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  1. Article ; Online: Mother and neonate suffering from COVID-19 infection. Is there any risk of vertical transmission? A case report.

    Urban, Agnieszka / Dyrda, Michal

    Ginekologia polska

    2021  Volume 92, Issue 10, Page(s) 701–703

    Abstract: Objectives: This study was carried out to visualize possible infection of the fetus during pregnancy through vertical transmission.: Material and methods: A descriptive observational study was conducted on a 39th week pregnant woman who was suspected ...

    Abstract Objectives: This study was carried out to visualize possible infection of the fetus during pregnancy through vertical transmission.
    Material and methods: A descriptive observational study was conducted on a 39th week pregnant woman who was suspected COVID-19. Pregnancy was ended with a caesarean section due to epidemiological reasons. The mother and newborn were examined for COVID-19 infection using PCR swabs.
    Results: At first there were discrepancies between SARS-CoV-2 test results from the nasopharyngeal swabs of the mother and the neonate. The mother tested positive, whereas the newborn tested negative. However, neonate's control swab was repeated within the following 48 hours and revealed a positive test result.
    Conclusions: The risk of vertical transmission with SARS-CoV2 is possible, therefore it is very important to isolate pregnant women from infected people to protect mothers and newborns.
    MeSH term(s) COVID-19/diagnosis ; COVID-19/transmission ; Cesarean Section ; Female ; Humans ; Infant, Newborn ; Infectious Disease Transmission, Vertical ; Mothers ; Pregnancy ; Pregnancy Complications, Infectious/diagnosis
    Language English
    Publishing date 2021-09-20
    Publishing country Poland
    Document type Case Reports ; Journal Article
    ZDB-ID 130894-4
    ISSN 2543-6767 ; 0017-0011
    ISSN (online) 2543-6767
    ISSN 0017-0011
    DOI 10.5603/GP.a2021.0033
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Deep brain stimulation for movement disorders after stroke: a systematic review of the literature.

    Paro, Mitch R / Dyrda, Michal / Ramanan, Srinath / Wadman, Grant / Burke, Stacey-Ann / Cipollone, Isabella / Bosworth, Cory / Zurek, Sarah / Senatus, Patrick B

    Journal of neurosurgery

    2022  Volume 138, Issue 6, Page(s) 1688–1701

    Abstract: Objective: Stroke remains the leading cause of disability in the United States. Even as acute care for strokes advances, there are limited options for improving function once the patient reaches the subacute and chronic stages. Identification of new ... ...

    Abstract Objective: Stroke remains the leading cause of disability in the United States. Even as acute care for strokes advances, there are limited options for improving function once the patient reaches the subacute and chronic stages. Identification of new therapeutic approaches is critical. Deep brain stimulation (DBS) holds promise for these patients. A number of case reports and small case series have reported improvement in movement disorders after strokes in patients treated with DBS. In this systematic review, the authors have summarized the patient characteristics, anatomical targets, stimulation parameters, and outcomes of patients who have undergone DBS treatment for poststroke movement disorders.
    Methods: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed. The PubMed, Scopus, and SpringerLink databases were searched for the keywords "DBS," "stroke," "movement," and "recovery" to identify patients treated with DBS for movement disorders after a stroke. The Joanna Briggs Institute Critical Appraisal checklists for case reports and case series were used to systematically analyze the quality of the included studies. Data collected from each study included patient demographic characteristics, stroke diagnosis, movement disorder, DBS target, stimulation parameters, complications, and outcomes.
    Results: The authors included 29 studies that described 53 patients who underwent placement of 82 total electrodes. Movement disorders included tremor (n = 18), dystonia (n = 18), hemiballism (n = 6), spastic hemiparesis (n = 1), chorea (n = 1), and mixed disorders (n = 9). The most common DBS targets were the globus pallidus internus (n = 32), ventral intermediate nucleus of thalamus (n = 25), and subthalamic area/subthalamic nucleus (n = 7). Monopolar stimulation was reported in 43 leads and bipolar stimulation in 13. High-frequency stimulation was used in 57 leads and low-frequency stimulation in 6. All patients but 1 had improvement in their movement disorders. Two complications were reported: speech impairment in 1 patient and hardware infection in another. The median (interquartile range) duration between stroke and DBS treatment was 6.5 (2.1-15.8) years.
    Conclusions: This is the first systematic review of DBS for poststroke movement disorders. Overall, most studies to date have been case reports and small series reporting heterogeneous patients and surgical strategies. This review suggests that DBS for movement disorders after a stroke has the potential to be effective and safe for diverse patients, and DBS may be a feasible option to improve function even years after a stroke.
    Language English
    Publishing date 2022-10-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3089-2
    ISSN 1933-0693 ; 0022-3085
    ISSN (online) 1933-0693
    ISSN 0022-3085
    DOI 10.3171/2022.8.JNS221334
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Comparison of the early effects of out-of-hospital resuscitation in selected urban and rural areas in Poland. A preliminary report from the Polish Cardiac Arrest Registry by the Polish Resuscitation Council.

    Cebula, Grzegorz M / Osadnik, Sonia / Wysocki, Michał / Dyrda, Marta / Chmura, Kaja / Nowakowski, Michał / Andres, Janusz

    Kardiologia polska

    2016  Volume 74, Issue 4, Page(s) 356–361

    Abstract: Background: The chain of survival is a set of most important factors affecting survival after an out-of-hospital cardiac arrest (OHCA). Recognising the difficulties in applying the chain is the key to improving outcomes. Early return of spontaneous ... ...

    Abstract Background: The chain of survival is a set of most important factors affecting survival after an out-of-hospital cardiac arrest (OHCA). Recognising the difficulties in applying the chain is the key to improving outcomes. Early return of spontaneous circulation (ROSC) after a cardiac arrest is a fundamental factor for patient survival.
    Aim: To assess the degree to which the location of OHCA affects ROSC during resuscitation efforts.
    Methods: Emergency medical service (EMS) teams filled cardiac arrest forms based on standard (Utstein) guidelines. The registry covered data from January 2013 to May 2014 collected over the area of 23,706 km2 with the population density of 90 persons/km2. This constitutes 7.6% of the area of Poland. The average population density in Poland is 123 persons/km2.
    Results: Over the time period covered by the study, 5185 cases of OHCA were reported. Resuscitation was attempted in 2415 (46.6%) cases. ROSC was achieved in 736 (30.48%) cases, including 374 (32.13%) cases in urban areas and 362 (28.94%) cases in rural areas. This difference was not statistically significant. Compared to urban areas, event witnesses in rural areas were more likely to perform bystander resuscitation and receive instructions from the EMS dispatchers. In the whole study group, cardiac disorders were the most common underlying cause of cardiac arrest (70.35%). The median time of ambulance arrival to the scene was significantly shorter in urban areas compared to rural areas (median time 6 min and 12 min, respectively).
    Conclusions: No significant relation was found between the location of OHCA and ROSC despite the fact that the time to ambulance arrival was significantly shorter in urban areas. In rural areas, resuscitation was more frequently initiated by the event witnesses. Both in urban and rural areas, OHCA was most commonly due to cardiac causes, and the initial recorded cardiac rhythm was a non-shockable one.
    MeSH term(s) Aged ; Cardiopulmonary Resuscitation/standards ; Emergency Medical Services/standards ; Female ; Humans ; Male ; Middle Aged ; Out-of-Hospital Cardiac Arrest/therapy ; Poland ; Registries ; Rural Health Services/standards ; Treatment Outcome ; Urban Health Services/standards
    Language English
    Publishing date 2016
    Publishing country Poland
    Document type Comparative Study ; Journal Article
    ZDB-ID 411492-9
    ISSN 1897-4279 ; 0022-9032
    ISSN (online) 1897-4279
    ISSN 0022-9032
    DOI 10.5603/KP.a2016.0001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Management of respiratory tract infections in primary care in Poland--results of the happy audit 2 project.

    Strumiło, Julia / Chlabicz, Sławomir / Ovhed, Ingvar / Zieliński, Andrzej / Pytel-Krolczuk, Barbara / Krzysztof, Buczkowski / Godycki-Cwirko, Maciek / Gowin, Ewelina / Gugnowski, Zbigniew / Panasiuk, Lech / Makowiec-Dyrda, Małgorzata / Mierzecki, Artur / Sieberto, Janusz / Sławin, Agata / Tomiak, Elzbieta

    Przeglad epidemiologiczny

    2014  Volume 68, Issue 1, Page(s) 33–8, 121–5

    Abstract: Objective: The Polish results of the international Happy Audit 2 project are reported which objective was to present therapeutic decisions made by general practitioners (especially antibiotics prescribed) and diagnostic methods applied to patients with ... ...

    Abstract Objective: The Polish results of the international Happy Audit 2 project are reported which objective was to present therapeutic decisions made by general practitioners (especially antibiotics prescribed) and diagnostic methods applied to patients with respiratory tract infections (RTI).
    Material and methods: [corrected] Following each visit of patient with respiratory tract infection, general practitioners participating in the study completed the questionnaire. The questionnaire included patient's data (age, gender), the duration of disease, clinical symptoms, diagnosis, prescribed antibiotics, additional testing as well as the influence of various factors on therapeutic decision.
    Results: Having considered the results of HappyAudit in Poland, a total of 5,137 office visits of patients reporting symptoms of RTIs were analyzed. The average duration of symptoms before visiting GP was 4.8 days (compared to average 4.4 in other countries). Worth noting is that additional testing in diagnosis of RTIs was performed less frequently in Poland: rapid streptococcal test was conducted in 0.4% of cases (European average: 4.45%), CRP--in 2.2% of patients (average from other countries: 14.2%) and chest X-ray in 2.3% of cases compared to 14% in other project's participants. In Poland, the most frequently applied antibiotic was amoxicillin, which was used in 28.9% of cases ended with antibiotic prescribing (amoxicillin/pivampicillin were also predominant in other countries, excluding Sweden). In Poland, macrolides (22.4% of all prescriptions for antibiotic) and cephalosporins (12.1%) were frequently used. The results indicate that narrow-spectrum antibiotics are prescribed in Poland less frequently, with the example being penicillin V which was prescribed in 6.7% of patients with RTIs who were given antibiotic.
    Conclusions: Comparing the results of Happy Audit 2 in Poland and other project's participants, the major differences consist in rare use of phenoxymethylpenicillin in favour of amoxicillin and macrolides as well as infrequent use of additional testing in diagnosis of RTIs in Poland.
    MeSH term(s) Adolescent ; Adult ; Aged ; Aged, 80 and over ; Anti-Bacterial Agents/therapeutic use ; Child ; Child, Preschool ; Clinical Audit/organization & administration ; Female ; General Practitioners ; Humans ; Infant ; Latvia ; Lithuania ; Male ; Middle Aged ; Poland ; Practice Patterns, Physicians' ; Primary Health Care/methods ; Respiratory Tract Infections/drug therapy ; Russia ; Sweden ; Treatment Outcome ; Young Adult
    Chemical Substances Anti-Bacterial Agents
    Language Polish
    Publishing date 2014
    Publishing country Poland
    Document type Comparative Study ; Journal Article ; Multicenter Study
    ZDB-ID 421782-2
    ISSN 0033-2100
    ISSN 0033-2100
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Constraints on an annihilation signal from a core of constant dark matter density around the milky way center with H.E.S.S.

    Abramowski, A / Aharonian, F / Ait Benkhali, F / Akhperjanian, A G / Angüner, E O / Backes, M / Balenderan, S / Balzer, A / Barnacka, A / Becherini, Y / Becker Tjus, J / Berge, D / Bernhard, S / Bernlöhr, K / Birsin, E / Biteau, J / Böttcher, M / Boisson, C / Bolmont, J /
    Bordas, P / Bregeon, J / Brun, F / Brun, P / Bryan, M / Bulik, T / Carrigan, S / Casanova, S / Chadwick, P M / Chakraborty, N / Chalme-Calvet, R / Chaves, R C G / Chrétien, M / Colafrancesco, S / Cologna, G / Conrad, J / Couturier, C / Cui, Y / Davids, I D / Degrange, B / Deil, C / deWilt, P / Djannati-Ataï, A / Domainko, W / Donath, A / Drury, L O'C / Dubus, G / Dutson, K / Dyks, J / Dyrda, M / Edwards, T / Egberts, K / Eger, P / Espigat, P / Farnier, C / Fegan, S / Feinstein, F / Fernandes, M V / Fernandez, D / Fiasson, A / Fontaine, G / Förster, A / Füßling, M / Gabici, S / Gajdus, M / Gallant, Y A / Garrigoux, T / Giavitto, G / Giebels, B / Glicenstein, J F / Gottschall, D / Grondin, M-H / Grudzińska, M / Hadasch, D / Häffner, S / Hahn, J / Harris, J / Heinzelmann, G / Henri, G / Hermann, G / Hervet, O / Hillert, A / Hinton, J A / Hofmann, W / Hofverberg, P / Holler, M / Horns, D / Ivascenko, A / Jacholkowska, A / Jahn, C / Jamrozy, M / Janiak, M / Jankowsky, F / Jung-Richardt, I / Kastendieck, M A / Katarzyński, K / Katz, U / Kaufmann, S / Khélifi, B / Kieffer, M / Klepser, S / Klochkov, D / Kluźniak, W / Kolitzus, D / Komin, Nu / Kosack, K / Krakau, S / Krayzel, F / Krüger, P P / Laffon, H / Lamanna, G / Lefaucheur, J / Lefranc, V / Lemière, A / Lemoine-Goumard, M / Lenain, J-P / Lohse, T / Lopatin, A / Lu, C-C / Marandon, V / Marcowith, A / Marx, R / Maurin, G / Maxted, N / Mayer, M / McComb, T J L / Méhault, J / Meintjes, P J / Menzler, U / Meyer, M / Mitchell, A M W / Moderski, R / Mohamed, M / Morå, K / Moulin, E / Murach, T / de Naurois, M / Niemiec, J / Nolan, S J / Oakes, L / Odaka, H / Ohm, S / Opitz, B / Ostrowski, M / Oya, I / Panter, M / Parsons, R D / Paz Arribas, M / Pekeur, N W / Pelletier, G / Petrucci, P-O / Peyaud, B / Pita, S / Poon, H / Pühlhofer, G / Punch, M / Quirrenbach, A / Raab, S / Reichardt, I / Reimer, A / Reimer, O / Renaud, M / de Los Reyes, R / Rieger, F / Romoli, C / Rosier-Lees, S / Rowell, G / Rudak, B / Rulten, C B / Sahakian, V / Salek, D / Sanchez, D A / Santangelo, A / Schlickeiser, R / Schüssler, F / Schulz, A / Schwanke, U / Schwarzburg, S / Schwemmer, S / Sol, H / Spanier, F / Spengler, G / Spies, F / Stawarz, Ł / Steenkamp, R / Stegmann, C / Stinzing, F / Stycz, K / Sushch, I / Tavernet, J-P / Tavernier, T / Taylor, A M / Terrier, R / Tluczykont, M / Trichard, C / Valerius, K / van Eldik, C / van Soelen, B / Vasileiadis, G / Veh, J / Venter, C / Viana, A / Vincent, P / Vink, J / Völk, H J / Volpe, F / Vorster, M / Vuillaume, T / Wagner, S J / Wagner, P / Wagner, R M / Ward, M / Weidinger, M / Weitzel, Q / White, R / Wierzcholska, A / Willmann, P / Wörnlein, A / Wouters, D / Yang, R / Zabalza, V / Zaborov, D / Zacharias, M / Zdziarski, A A / Zech, A / Zechlin, H-S

    Physical review letters

    2015  Volume 114, Issue 8, Page(s) 81301

    Abstract: An annihilation signal of dark matter is searched for from the central region of the Milky Way. Data acquired in dedicated on-off observations of the Galactic center region with H.E.S.S. are analyzed for this purpose. No significant signal is found in a ... ...

    Abstract An annihilation signal of dark matter is searched for from the central region of the Milky Way. Data acquired in dedicated on-off observations of the Galactic center region with H.E.S.S. are analyzed for this purpose. No significant signal is found in a total of ∼9  h of on-off observations. Upper limits on the velocity averaged cross section, ⟨σv⟩, for the annihilation of dark matter particles with masses in the range of ∼300  GeV to ∼10  TeV are derived. In contrast to previous constraints derived from observations of the Galactic center region, the constraints that are derived here apply also under the assumption of a central core of constant dark matter density around the center of the Galaxy. Values of ⟨σv⟩ that are larger than 3×10^{-24}  cm^{3}/s are excluded for dark matter particles with masses between ∼1 and ∼4  TeV at 95% C.L. if the radius of the central dark matter density core does not exceed 500 pc. This is the strongest constraint that is derived on ⟨σv⟩ for annihilating TeV mass dark matter without the assumption of a centrally cusped dark matter density distribution in the search region.
    Language English
    Publishing date 2015-02-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.114.081301
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  6. Article ; Online: H.E.S.S. Limits on Linelike Dark Matter Signatures in the 100 GeV to 2 TeV Energy Range Close to the Galactic Center.

    Abdalla, H / Abramowski, A / Aharonian, F / Ait Benkhali, F / Akhperjanian, A G / Andersson, T / Angüner, E O / Arrieta, M / Aubert, P / Backes, M / Balzer, A / Barnard, M / Becherini, Y / Becker Tjus, J / Berge, D / Bernhard, S / Bernlöhr, K / Birsin, E / Blackwell, R /
    Böttcher, M / Boisson, C / Bolmont, J / Bordas, P / Bregeon, J / Brun, F / Brun, P / Bryan, M / Bulik, T / Capasso, M / Carr, J / Casanova, S / Chakraborty, N / Chalme-Calvet, R / Chaves, R C G / Chen, A / Chevalier, J / Chrétien, M / Colafrancesco, S / Cologna, G / Condon, B / Conrad, J / Couturier, C / Cui, Y / Davids, I D / Degrange, B / Deil, C / Devin, J / deWilt, P / Djannati-Ataï, A / Domainko, W / Donath, A / Drury, L O'C / Dubus, G / Dutson, K / Dyks, J / Dyrda, M / Edwards, T / Egberts, K / Eger, P / Ernenwein, J-P / Eschbach, S / Farnier, C / Fegan, S / Fernandes, M V / Fiasson, A / Fontaine, G / Förster, A / Funk, S / Füßling, M / Gabici, S / Gajdus, M / Gallant, Y A / Garrigoux, T / Giavitto, G / Giebels, B / Glicenstein, J F / Gottschall, D / Goyal, A / Grondin, M-H / Grudzińska, M / Hadasch, D / Hahn, J / Hawkes, J / Heinzelmann, G / Henri, G / Hermann, G / Hervet, O / Hillert, A / Hinton, J A / Hofmann, W / Hoischen, C / Holler, M / Horns, D / Ivascenko, A / Jacholkowska, A / Jamrozy, M / Janiak, M / Jankowsky, D / Jankowsky, F / Jingo, M / Jogler, T / Jouvin, L / Jung-Richardt, I / Kastendieck, M A / Katarzyński, K / Katz, U / Kerszberg, D / Khélifi, B / Kieffer, M / King, J / Klepser, S / Klochkov, D / Kluźniak, W / Kolitzus, D / Komin, Nu / Kosack, K / Krakau, S / Kraus, M / Krayzel, F / Krüger, P P / Laffon, H / Lamanna, G / Lau, J / Lees, J-P / Lefaucheur, J / Lefranc, V / Lemière, A / Lemoine-Goumard, M / Lenain, J-P / Leser, E / Liu, R / Lohse, T / Lorentz, M / Lypova, I / Marandon, V / Marcowith, A / Mariaud, C / Marx, R / Maurin, G / Maxted, N / Mayer, M / Meintjes, P J / Meyer, M / Mitchell, A M W / Moderski, R / Mohamed, M / Morå, K / Moulin, E / Murach, T / de Naurois, M / Niederwanger, F / Niemiec, J / Oakes, L / O'Brien, P / Odaka, H / Ohm, S / Ostrowski, M / Öttl, S / Oya, I / Padovani, M / Panter, M / Parsons, R D / Paz Arribas, M / Pekeur, N W / Pelletier, G / Perennes, C / Petrucci, P-O / Peyaud, B / Pita, S / Poon, H / Prokhorov, D / Prokoph, H / Pühlhofer, G / Punch, M / Quirrenbach, A / Raab, S / Reimer, A / Reimer, O / Renaud, M / de Los Reyes, R / Rieger, F / Romoli, C / Rosier-Lees, S / Rowell, G / Rudak, B / Rulten, C B / Sahakian, V / Salek, D / Sanchez, D A / Santangelo, A / Sasaki, M / Schlickeiser, R / Schüssler, F / Schulz, A / Schwanke, U / Schwemmer, S / Settimo, M / Seyffert, A S / Shafi, N / Shilon, I / Simoni, R / Sol, H / Spanier, F / Spengler, G / Spies, F / Stawarz, Ł / Steenkamp, R / Stegmann, C / Stinzing, F / Stycz, K / Sushch, I / Tavernet, J-P / Tavernier, T / Taylor, A M / Terrier, R / Tibaldo, L / Tluczykont, M / Trichard, C / Tuffs, R / van der Walt, J / van Eldik, C / van Soelen, B / Vasileiadis, G / Veh, J / Venter, C / Viana, A / Vincent, P / Vink, J / Voisin, F / Völk, H J / Vuillaume, T / Wadiasingh, Z / Wagner, S J / Wagner, P / Wagner, R M / White, R / Wierzcholska, A / Willmann, P / Wörnlein, A / Wouters, D / Yang, R / Zabalza, V / Zaborov, D / Zacharias, M / Zdziarski, A A / Zech, A / Zefi, F / Ziegler, A / Żywucka, N

    Physical review letters

    2016  Volume 117, Issue 15, Page(s) 151302

    Abstract: A search for dark matter linelike signals iss performed in the vicinity of the Galactic Center by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis iss developed to improve the sensitivity to linelike signals. ... ...

    Abstract A search for dark matter linelike signals iss performed in the vicinity of the Galactic Center by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis iss developed to improve the sensitivity to linelike signals. The upgraded analysis along with newer data extend the energy coverage of the previous measurement down to 100 GeV. The 18 h of data collected with the H.E.S.S. array allow one to rule out at 95% C.L. the presence of a 130 GeV line (at l=-1.5°, b=0° and for a dark matter profile centered at this location) previously reported in Fermi-LAT data. This new analysis overlaps significantly in energy with previous Fermi-LAT and H.E.S.S.
    Results: No significant excess associated with dark matter annihilations was found in the energy range of 100 GeV to 2 TeV and upper limits on the gamma-ray flux and the velocity weighted annihilation cross section are derived adopting an Einasto dark matter halo profile. Expected limits for present and future large statistics H.E.S.S. observations are also given.
    Language English
    Publishing date 2016-10-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.117.151302
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  7. Article ; Online: Search for Dark Matter Annihilations towards the Inner Galactic Halo from 10 Years of Observations with H.E.S.S.

    Abdallah, H / Abramowski, A / Aharonian, F / Ait Benkhali, F / Akhperjanian, A G / Angüner, E / Arrieta, M / Aubert, P / Backes, M / Balzer, A / Barnard, M / Becherini, Y / Becker Tjus, J / Berge, D / Bernhard, S / Bernlöhr, K / Birsin, E / Blackwell, R / Böttcher, M /
    Boisson, C / Bolmont, J / Bordas, P / Bregeon, J / Brun, F / Brun, P / Bryan, M / Bulik, T / Capasso, M / Carr, J / Casanova, S / Chakraborty, N / Chalme-Calvet, R / Chaves, R C G / Chen, A / Chevalier, J / Chrétien, M / Colafrancesco, S / Cologna, G / Condon, B / Conrad, J / Couturier, C / Cui, Y / Davids, I D / Degrange, B / Deil, C / deWilt, P / Djannati-Ataï, A / Domainko, W / Donath, A / Drury, L O'C / Dubus, G / Dutson, K / Dyks, J / Dyrda, M / Edwards, T / Egberts, K / Eger, P / Ernenwein, J-P / Eschbach, S / Farnier, C / Fegan, S / Fernandes, M V / Fiasson, A / Fontaine, G / Förster, A / Funk, S / Füßling, M / Gabici, S / Gajdus, M / Gallant, Y A / Garrigoux, T / Giavitto, G / Giebels, B / Glicenstein, J F / Gottschall, D / Goyal, A / Grondin, M-H / Grudzińska, M / Hadasch, D / Hahn, J / Hawkes, J / Heinzelmann, G / Henri, G / Hermann, G / Hervet, O / Hillert, A / Hinton, J A / Hofmann, W / Hoischen, C / Holler, M / Horns, D / Ivascenko, A / Jacholkowska, A / Jamrozy, M / Janiak, M / Jankowsky, D / Jankowsky, F / Jingo, M / Jogler, T / Jouvin, L / Jung-Richardt, I / Kastendieck, M A / Katarzyński, K / Katz, U / Kerszberg, D / Khélifi, B / Kieffer, M / King, J / Klepser, S / Klochkov, D / Kluźniak, W / Kolitzus, D / Komin, Nu / Kosack, K / Krakau, S / Kraus, M / Krayzel, F / Krüger, P P / Laffon, H / Lamanna, G / Lau, J / Lees, J-P / Lefaucheur, J / Lefranc, V / Lemière, A / Lemoine-Goumard, M / Lenain, J-P / Leser, E / Lohse, T / Lorentz, M / Lui, R / Lypova, I / Marandon, V / Marcowith, A / Mariaud, C / Marx, R / Maurin, G / Maxted, N / Mayer, M / Meintjes, P J / Menzler, U / Meyer, M / Mitchell, A M W / Moderski, R / Mohamed, M / Morå, K / Moulin, E / Murach, T / de Naurois, M / Niederwanger, F / Niemiec, J / Oakes, L / Odaka, H / Ohm, S / Öttl, S / Ostrowski, M / Oya, I / Padovani, M / Panter, M / Parsons, R D / Paz Arribas, M / Pekeur, N W / Pelletier, G / Petrucci, P-O / Peyaud, B / Pita, S / Poon, H / Prokhorov, D / Prokoph, H / Pühlhofer, G / Punch, M / Quirrenbach, A / Raab, S / Reimer, A / Reimer, O / Renaud, M / de Los Reyes, R / Rieger, F / Romoli, C / Rosier-Lees, S / Rowell, G / Rudak, B / Rulten, C B / Sahakian, V / Salek, D / Sanchez, D A / Santangelo, A / Sasaki, M / Schlickeiser, R / Schüssler, F / Schulz, A / Schwanke, U / Schwemmer, S / Seyffert, A S / Shafi, N / Simoni, R / Sol, H / Spanier, F / Spengler, G / Spieß, F / Stawarz, L / Steenkamp, R / Stegmann, C / Stinzing, F / Stycz, K / Sushch, I / Tavernet, J-P / Tavernier, T / Taylor, A M / Terrier, R / Tluczykont, M / Trichard, C / Tuffs, R / van der Walt, J / van Eldik, C / van Soelen, B / Vasileiadis, G / Veh, J / Venter, C / Viana, A / Vincent, P / Vink, J / Voisin, F / Völk, H J / Vuillaume, T / Wadiasingh, Z / Wagner, S J / Wagner, P / Wagner, R M / White, R / Wierzcholska, A / Willmann, P / Wörnlein, A / Wouters, D / Yang, R / Zabalza, V / Zaborov, D / Zacharias, M / Zdziarski, A A / Zech, A / Zefi, F / Ziegler, A / Żywucka, N

    Physical review letters

    2016  Volume 117, Issue 11, Page(s) 111301

    Abstract: The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a search for the annihilations of DM particles using γ-ray observations towards ... ...

    Abstract The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a search for the annihilations of DM particles using γ-ray observations towards the inner 300 pc of the Milky Way, with the H.E.S.S. array of ground-based Cherenkov telescopes. The analysis is based on a 2D maximum likelihood method using Galactic Center (GC) data accumulated by H.E.S.S. over the last 10 years (2004-2014), and does not show any significant γ-ray signal above background. Assuming Einasto and Navarro-Frenk-White DM density profiles at the GC, we derive upper limits on the annihilation cross section ⟨σv⟩. These constraints are the strongest obtained so far in the TeV DM mass range and improve upon previous limits by a factor 5. For the Einasto profile, the constraints reach ⟨σv⟩ values of 6×10^{-26}  cm^{3} s^{-1} in the W^{+}W^{-} channel for a DM particle mass of 1.5 TeV, and 2×10^{-26}  cm^{3} s^{-1} in the τ^{+}τ^{-} channel for a 1 TeV mass. For the first time, ground-based γ-ray observations have reached sufficient sensitivity to probe ⟨σv⟩ values expected from the thermal relic density for TeV DM particles.
    Language English
    Publishing date 2016-09-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.117.111301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Search for photon-linelike signatures from dark matter annihilations with H.E.S.S.

    Abramowski, A / Acero, F / Aharonian, F / Akhperjanian, A G / Anton, G / Balenderan, S / Balzer, A / Barnacka, A / Becherini, Y / Becker Tjus, J / Bernlöhr, K / Birsin, E / Biteau, J / Bochow, A / Boisson, C / Bolmont, J / Bordas, P / Brucker, J / Brun, F /
    Brun, P / Bulik, T / Carrigan, S / Casanova, S / Cerruti, M / Chadwick, P M / Chaves, R C G / Cheesebrough, A / Colafrancesco, S / Cologna, G / Conrad, J / Couturier, C / Dalton, M / Daniel, M K / Davids, I D / Degrange, B / Deil, C / deWilt, P / Dickinson, H J / Djannati-Ataï, A / Domainko, W / Drury, L O'C / Dubus, G / Dutson, K / Dyks, J / Dyrda, M / Egberts, K / Eger, P / Espigat, P / Fallon, L / Farnier, C / Fegan, S / Feinstein, F / Fernandes, M V / Fernandez, D / Fiasson, A / Fontaine, G / Förster, A / Füßling, M / Gajdus, M / Gallant, Y A / Garrigoux, T / Gast, H / Giebels, B / Glicenstein, J F / Glück, B / Göring, D / Grondin, M-H / Häffner, S / Hague, J D / Hahn, J / Hampf, D / Harris, J / Heinz, S / Heinzelmann, G / Henri, G / Hermann, G / Hillert, A / Hinton, J A / Hofmann, W / Hofverberg, P / Holler, M / Horns, D / Jacholkowska, A / Jahn, C / Jamrozy, M / Jung, I / Kastendieck, M A / Katarzyński, K / Katz, U / Kaufmann, S / Khélifi, B / Klepser, S / Klochkov, D / Kluźniak, W / Kneiske, T / Komin, Nu / Kosack, K / Kossakowski, R / Krayzel, F / Krüger, P P / Laffon, H / Lamanna, G / Lefaucheur, J / Lemoine-Goumard, M / Lenain, J-P / Lennarz, D / Lohse, T / Lopatin, A / Lu, C-C / Marandon, V / Marcowith, A / Masbou, J / Maurin, G / Maxted, N / Mayer, M / McComb, T J L / Medina, M C / Méhault, J / Menzler, U / Moderski, R / Mohamed, M / Moulin, E / Naumann, C L / Naumann-Godo, M / de Naurois, M / Nedbal, D / Nekrassov, D / Nguyen, N / Niemiec, J / Nolan, S J / Ohm, S / de Oña Wilhelmi, E / Opitz, B / Ostrowski, M / Oya, I / Panter, M / Parsons, R D / Paz Arribas, M / Pekeur, N W / Pelletier, G / Perez, J / Petrucci, P-O / Peyaud, B / Pita, S / Pühlhofer, G / Punch, M / Quirrenbach, A / Raue, M / Reimer, A / Reimer, O / Renaud, M / de Los Reyes, R / Rieger, F / Ripken, J / Rob, L / Rosier-Lees, S / Rowell, G / Rudak, B / Rulten, C B / Sahakian, V / Sanchez, D A / Santangelo, A / Schlickeiser, R / Schulz, A / Schwanke, U / Schwarzburg, S / Schwemmer, S / Sheidaei, F / Skilton, J L / Sol, H / Spengler, G / Stawarz, L / Steenkamp, R / Stegmann, C / Stinzing, F / Stycz, K / Sushch, I / Szostek, A / Tavernet, J-P / Terrier, R / Tluczykont, M / Trichard, C / Valerius, K / van Eldik, C / Vasileiadis, G / Venter, C / Viana, A / Vincent, P / Völk, H J / Volpe, F / Vorobiov, S / Vorster, M / Wagner, S J / Ward, M / White, R / Wierzcholska, A / Wouters, D / Zacharias, M / Zajczyk, A / Zdziarski, A A / Zech, A / Zechlin, H-S

    Physical review letters

    2013  Volume 110, Issue 4, Page(s) 41301

    Abstract: Gamma-ray line signatures can be expected in the very-high-energy (E(γ)>100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal would be readily distinguishable from astrophysical γ-ray sources that in most ...

    Abstract Gamma-ray line signatures can be expected in the very-high-energy (E(γ)>100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal would be readily distinguishable from astrophysical γ-ray sources that in most cases produce continuous spectra that span over several orders of magnitude in energy. Using data collected with the H.E.S.S. γ-ray instrument, upper limits on linelike emission are obtained in the energy range between ∼ 500 GeV and ∼ 25 TeV for the central part of the Milky Way halo and for extragalactic observations, complementing recent limits obtained with the Fermi-LAT instrument at lower energies. No statistically significant signal could be found. For monochromatic γ-ray line emission, flux limits of (2 × 10(-7) -2 × 10(-5)) m(-2) s(-1) sr(-1) and (1 × 10(-8) -2 × 10(-6)) m(-2) s(-1)sr(-1) are obtained for the central part of the Milky Way halo and extragalactic observations, respectively. For a DM particle mass of 1 TeV, limits on the velocity-averaged DM annihilation cross section ⟨σv⟩(χχ → γγ) reach ∼ 10(-27) cm(3)s(-1), based on the Einasto parametrization of the Galactic DM halo density profile.
    Language English
    Publishing date 2013-01-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.110.041301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Search for a dark matter annihilation signal from the galactic center halo with H.E.S.S.

    Abramowski, A / Acero, F / Aharonian, F / Akhperjanian, A G / Anton, G / Barnacka, A / de Almeida, U Barres / Bazer-Bachi, A R / Becherini, Y / Becker, J / Behera, B / Bernlöhr, K / Bochow, A / Boisson, C / Bolmont, J / Bordas, P / Borrel, V / Brucker, J / Brun, F /
    Brun, P / Bulik, T / Büsching, I / Carrigan, S / Casanova, S / Cerruti, M / Chadwick, P M / Charbonnier, A / Chaves, R C G / Cheesebrough, A / Chounet, L-M / Clapson, A C / Coignet, G / Conrad, J / Dalton, M / Daniel, M K / Davids, I D / Degrange, B / Deil, C / Dickinson, H J / Djannati-Ataï, A / Domainko, W / Drury, L O'C / Dubois, F / Dubus, G / Dyks, J / Dyrda, M / Egberts, K / Eger, P / Espigat, P / Fallon, L / Farnier, C / Fegan, S / Feinstein, F / Fernandes, M V / Fiasson, A / Fontaine, G / Förster, A / Füssling, M / Gallant, Y A / Gast, H / Gérard, L / Gerbig, D / Giebels, B / Glicenstein, J F / Glück, B / Goret, P / Göring, D / Hague, J D / Hampf, D / Hauser, M / Heinz, S / Heinzelmann, G / Henri, G / Hermann, G / Hinton, J A / Hoffmann, A / Hofmann, W / Hofverberg, P / Horns, D / Jacholkowska, A / de Jager, O C / Jahn, C / Jamrozy, M / Jung, I / Kastendieck, M A / Katarzyński, K / Katz, U / Kaufmann, S / Keogh, D / Kerschhaggl, M / Khangulyan, D / Khélifi, B / Klochkov, D / Kluźniak, W / Kneiske, T / Komin, Nu / Kosack, K / Kossakowski, R / Laffon, H / Lamanna, G / Lennarz, D / Lohse, T / Lopatin, A / Lu, C-C / Marandon, V / Marcowith, A / Masbou, J / Maurin, D / Maxted, N / McComb, T J L / Medina, M C / Méhault, J / Moderski, R / Moulin, E / Naumann, C L / Naumann-Godo, M / de Naurois, M / Nedbal, D / Nekrassov, D / Nguyen, N / Nicholas, B / Niemiec, J / Nolan, S J / Ohm, S / Olive, J-F / Wilhelmi, E de Oña / Opitz, B / Ostrowski, M / Panter, M / Arribas, M Paz / Pedaletti, G / Pelletier, G / Petrucci, P-O / Pita, S / Pühlhofer, G / Punch, M / Quirrenbach, A / Raue, M / Rayner, S M / Reimer, A / Reimer, O / Renaud, M / de los Reyes, R / Rieger, F / Ripken, J / Rob, L / Rosier-Lees, S / Rowell, G / Rudak, B / Rulten, C B / Ruppel, J / Ryde, F / Sahakian, V / Santangelo, A / Schlickeiser, R / Schöck, F M / Schönwald, A / Schwanke, U / Schwarzburg, S / Schwemmer, S / Shalchi, A / Sikora, M / Skilton, J L / Sol, H / Spengler, G / Stawarz, Ł / Steenkamp, R / Stegmann, C / Stinzing, F / Sushch, I / Szostek, A / Tavernet, J-P / Terrier, R / Tibolla, O / Tluczykont, M / Valerius, K / van Eldik, C / Vasileiadis, G / Venter, C / Vialle, J P / Viana, A / Vincent, P / Vivier, M / Völk, H J / Volpe, F / Vorobiov, S / Vorster, M / Wagner, S J / Ward, M / Wierzcholska, A / Zajczyk, A / Zdziarski, A A / Zech, A / Zechlin, H-S

    Physical review letters

    2011  Volume 106, Issue 16, Page(s) 161301

    Abstract: A search for a very-high-energy (VHE; ≥100  GeV) γ-ray signal from self-annihilating particle dark matter (DM) is performed towards a region of projected distance r∼45-150  pc from the Galactic center. The background-subtracted γ-ray spectrum measured ... ...

    Abstract A search for a very-high-energy (VHE; ≥100  GeV) γ-ray signal from self-annihilating particle dark matter (DM) is performed towards a region of projected distance r∼45-150  pc from the Galactic center. The background-subtracted γ-ray spectrum measured with the High Energy Stereoscopic System (H.E.S.S.) γ-ray instrument in the energy range between 300 GeV and 30 TeV shows no hint of a residual γ-ray flux. Assuming conventional Navarro-Frenk-White and Einasto density profiles, limits are derived on the velocity-weighted annihilation cross section (σv) as a function of the DM particle mass. These are among the best reported so far for this energy range and in particular differ only little between the chosen density profile parametrizations. In particular, for the DM particle mass of ∼1  TeV, values for (σv) above 3×10(-25)  cm(3) s(-1) are excluded for the Einasto density profile.
    Language English
    Publishing date 2011-04-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.106.161301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Detection of gamma rays from a starburst galaxy.

    Acero, F / Aharonian, F / Akhperjanian, A G / Anton, G / Barres de Almeida, U / Bazer-Bachi, A R / Becherini, Y / Behera, B / Bernlöhr, K / Bochow, A / Boisson, C / Bolmont, J / Borrel, V / Brucker, J / Brun, F / Brun, P / Bühler, R / Bulik, T / Büsching, I /
    Boutelier, T / Chadwick, P M / Charbonnier, A / Chaves, R C G / Cheesebrough, A / Chounet, L-M / Clapson, A C / Coignet, G / Dalton, M / Daniel, M K / Davids, I D / Degrange, B / Deil, C / Dickinson, H J / Djannati-Ataï, A / Domainko, W / Drury, L O'C / Dubois, F / Dubus, G / Dyks, J / Dyrda, M / Egberts, K / Emmanoulopoulos, D / Espigat, P / Farnier, C / Fegan, S / Feinstein, F / Fiasson, A / Förster, A / Fontaine, G / Füssling, M / Gabici, S / Gallant, Y A / Gérard, L / Gerbig, D / Giebels, B / Glicenstein, J F / Glück, B / Goret, P / Göring, D / Hauser, D / Hauser, M / Heinz, S / Heinzelmann, G / Henri, G / Hermann, G / Hinton, J A / Hoffmann, A / Hofmann, W / Hofverberg, P / Hoppe, S / Horns, D / Jacholkowska, A / de Jager, O C / Jahn, C / Jung, I / Katarzyński, K / Katz, U / Kaufmann, S / Kerschhaggl, M / Khangulyan, D / Khélifi, B / Keogh, D / Klochkov, D / Kluźniak, W / Kneiske, T / Komin, Nu / Kosack, K / Kossakowski, R / Lamanna, G / Lenain, J-P / Lohse, T / Marandon, V / Martineau-Huynh, O / Marcowith, A / Masbou, J / Maurin, D / McComb, T J L / Medina, M C / Méhault, J / Moderski, R / Moulin, E / Naumann-Godo, M / de Naurois, M / Nedbal, D / Nekrassov, D / Nicholas, B / Niemiec, J / Nolan, S J / Ohm, S / Olive, J-F / de Oña Wilhelmi, E / Orford, K J / Ostrowski, M / Panter, M / Paz Arribas, M / Pedaletti, G / Pelletier, G / Petrucci, P-O / Pita, S / Pühlhofer, G / Punch, M / Quirrenbach, A / Raubenheimer, B C / Raue, M / Rayner, S M / Reimer, O / Renaud, M / Rieger, F / Ripken, J / Rob, L / Rosier-Lees, S / Rowell, G / Rudak, B / Rulten, C B / Ruppel, J / Sahakian, V / Santangelo, A / Schlickeiser, R / Schöck, F M / Schwanke, U / Schwarzburg, S / Schwemmer, S / Shalchi, A / Sikora, M / Skilton, J L / Sol, H / Stawarz, Ł / Steenkamp, R / Stegmann, C / Stinzing, F / Superina, G / Szostek, A / Tam, P H / Tavernet, J-P / Terrier, R / Tibolla, O / Tluczykont, M / van Eldik, C / Vasileiadis, G / Venter, C / Venter, L / Vialle, J P / Vincent, P / Vivier, M / Völk, H J / Volpe, F / Wagner, S J / Ward, M / Zdziarski, A A / Zech, A

    Science (New York, N.Y.)

    2009  Volume 326, Issue 5956, Page(s) 1080–1082

    Abstract: Starburst galaxies exhibit in their central regions a highly increased rate of supernovae, the remnants of which are thought to accelerate energetic cosmic rays up to energies of approximately 10(15) electron volts. We report the detection of gamma rays-- ...

    Abstract Starburst galaxies exhibit in their central regions a highly increased rate of supernovae, the remnants of which are thought to accelerate energetic cosmic rays up to energies of approximately 10(15) electron volts. We report the detection of gamma rays--tracers of such cosmic rays--from the starburst galaxy NGC 253 using the High Energy Stereoscopic System (H.E.S.S.) array of imaging atmospheric Cherenkov telescopes. The gamma-ray flux above 220 billion electron volts is F = (5.5 +/- 1.0(stat) +/- 2.8(sys)) x 10(-13) cm(-2) s(-1), implying a cosmic-ray density about three orders of magnitude larger than that in the center of the Milky Way. The fraction of cosmic-ray energy channeled into gamma rays in this starburst environment is five times as large as that in our Galaxy.
    Language English
    Publishing date 2009-11-20
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.1178826
    Database MEDical Literature Analysis and Retrieval System OnLINE

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