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Book ; Online: Searching for long faint astronomical high energy transients

Crupi, Riccardo / Dilillo, Giuseppe / Ward, Kester / Bissaldi, Elisabetta / Fiore, Fabrizio / Vacchi, Andrea

a data driven approach

2023

Abstract: HERMES (High Energy Rapid Modular Ensemble of Satellites) pathfinder is an in-orbit demonstration consisting of a constellation of six 3U nano-satellites hosting simple but innovative detectors for the monitoring of cosmic high-energy transients. The ... ...

Abstract	HERMES (High Energy Rapid Modular Ensemble of Satellites) pathfinder is an in-orbit demonstration consisting of a constellation of six 3U nano-satellites hosting simple but innovative detectors for the monitoring of cosmic high-energy transients. The main objective of HERMES Pathfinder is to prove that accurate position of high-energy cosmic transients can be obtained using miniaturized hardware. The transient position is obtained by studying the delay time of arrival of the signal to different detectors hosted by nano-satellites on low Earth orbits. To this purpose, the goal is to achive an overall accuracy of a fraction of a micro-second. In this context, we need to develop novel tools to fully exploit the future scientific data output of HERMES Pathfinder. In this paper, we introduce a new framework to assess the background count rate of a space-born, high energy detector; a key step towards the identification of faint astrophysical transients. We employ a Neural Network (NN) to estimate the background lightcurves on different timescales. Subsequently, we employ a fast change-point and anomaly detection technique to isolate observation segments where statistically significant excesses in the observed count rate relative to the background estimate exist. We test the new software on archival data from the NASA Fermi Gamma-ray Burst Monitor (GBM), which has a collecting area and background level of the same order of magnitude to those of HERMES Pathfinder. The NN performances are discussed and analyzed over period of both high and low solar activity. We were able to confirm events in the Fermi/GBM catalog and found events, not present in Fermi/GBM database, that could be attributed to Solar Flares, Terrestrial Gamma-ray Flashes, Gamma-Ray Bursts, Galactic X-ray flash. Seven of these are selected and analyzed further, providing an estimate of localisation and a tentative classification.
Keywords	Astrophysics - High Energy Astrophysical Phenomena ; Computer Science - Machine Learning
Subject code	520
Publishing date	2023-03-28
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online ; Thesis: High-energy emission from bright Gamma-Ray Bursts using Fermi

Bissaldi, Elisabetta

2010

Abstract: GammaRay Bursts (GRBs) represent the most explosive events in the Universe after the Big Bang. They are sudden, intense flashes of gammarays, which, for a few blinding seconds, become the brightest objects in the Universe. This reflects extreme ... ...

Author's details	Elisabetta Bissaldi
Abstract	GammaRay Bursts (GRBs) represent the most explosive events in the Universe after the Big Bang. They are sudden, intense flashes of gammarays, which, for a few blinding seconds, become the brightest objects in the Universe. This reflects extreme conditions which are fascinating and worth exploring. During the last two decades, the understanding of GRBs has been revolutionized more by observational progress rather than by theoretical predictions. A first major advance in the comprehension of the GRB phenomenon occurred in 1991 with the launch of the Compton GammaRay Observatory (CGRO). The allsky survey from the Burst and Transient Experiment onboard CGRO measured about 3000 bursts and showed that they were isotropically distributed, thus suggesting a cosmological origin. A better understanding of the physics of GRBs has been made possible by precise localizations in the late ’90s, which discovered that the prompt emission in gammarays is followed by a longerlasting afterglow, which can be detected in all wavelengths ranges from radio, optical, to X and gammarays up to several days after the explosion ...
Language	English
Size	Online-Ressource (242 S., 9,32 MB)
Document type	Book ; Online ; Thesis
Thesis / German Habilitation thesis	Techn. Univ., Diss.--München, 2010
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Online ; Thesis: High-energy emission from bright Gamma-Ray Bursts using Fermi

Bissaldi, Elisabetta

2010

Author's details	Elisabetta Bissaldi
Abstract	GammaRay Bursts (GRBs) represent the most explosive events in the Universe after the Big Bang. They are sudden, intense flashes of gammarays, which, for a few blinding seconds, become the brightest objects in the Universe. This reflects extreme conditions which are fascinating and worth exploring. During the last two decades, the understanding of GRBs has been revolutionized more by observational progress rather than by theoretical predictions. A first major advance in the comprehension of the GRB phenomenon occurred in 1991 with the launch of the Compton GammaRay Observatory (CGRO). The allsky survey from the Burst and Transient Experiment onboard CGRO measured about 3000 bursts and showed that they were isotropically distributed, thus suggesting a cosmological origin. A better understanding of the physics of GRBs has been made possible by precise localizations in the late ’90s, which discovered that the prompt emission in gammarays is followed by a longerlasting afterglow, which can be detected in all wavelengths ranges from radio, optical, to X and gammarays up to several days after the explosion ...
Language	English
Size	Online-Ressource (242 S., 9,32 MB)
Document type	Book ; Online ; Thesis
Thesis / German Habilitation thesis	Techn. Univ., Diss.--München, 2010
Database	Former special subject collection: coastal and deep sea fishing

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Article ; Online: Rapid spectral variability of a giant flare from a magnetar in NGC 253.

Nature

2021 Volume 589, Issue 7841, Page(s) 207–210

Abstract: Magnetars are neutron stars with extremely strong magnetic fields ( ... ...

Abstract	Magnetars are neutron stars with extremely strong magnetic fields (10
Language	English
Publishing date	2021-01-13
Publishing country	England
Document type	Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, Non-U.S. Gov't
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-020-03077-8
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Article: Investigating the Nature of Late-Time High-Energy GRB Emission Through Joint

Ajello, M / Baldini, L / Barbiellini, G / Bastieri, D / Bellazzini, R / Bissaldi, E / Blandford, R D / Bonino, R / Bottacini, E / Bregeon, J / Bruel, P / Buehler, R / Cameron, R A / Caputo, R / Caraveo, P A / Chiaro, G / Ciprini, S / Cohen-Tanugi, J / Costantin, D /

D'Ammando, F / DE Palma, F / DI Lalla, N / DI Mauro, M / DI Venere, L / Domínguez, A / Favuzzi, C / Franckowiak, A / Fukazawa, Y / Funk, S / Fusco, P / Gargano, F / Gasparrini, D / Giglietto, N / Giordano, F / Giroletti, M / Green, D / Grenier, I A / Guiriec, S / Holt, C / Horan, D / Jóhannesson, G / Kocevski, D / Kuss, M / LA Mura, G / Larsson, S / Li, J / Longo, F / Loparco, F / Lubrano, P / Magill, J D / Maldera, S / Manfreda, A / Mazziotta, M N / Michelson, P F / Mizuno, T / Monzani, M E / Morselli, A / Negro, M / Nuss, E / Omodei, N / Orienti, M / Orlando, E / Paliya, V S / Perkins, J S / Persic, M / Pesce-Rollins, M / Piron, F / Principe, G / Racusin, J L / Rainò, S / Rando, R / Razzano, M / Razzaque, S / Reimer, A / Reimer, O / Sgrò, C / Siskind, E J / Spandre, G / Spinelli, P / Tak, D / Thayer, J B / Torres, D F / Tosti, G / Valverde, J / Vogel, M / Wood, K

The Astrophysical journal

2018 Volume 863, Issue 2

Abstract: We use joint observations by ... ...

Abstract	We use joint observations by the
Language	English
Publishing date	2018-08-17
Publishing country	United States
Document type	Journal Article
ZDB-ID	2960-9
ISSN	0004-637X
ISSN	0004-637X
DOI	10.3847/1538-4357/aad000
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Article ; Online: Verification of the Optical System of the 9.7-m Prototype Schwarzschild-Couder Telescope

Adams, C. / Alfaro, R. / Ambrosi, G. / Ambrosio, M. / Aramo, C. / Benbow, W. / Bertucci, B. / Bissaldi, E. / Bitossi, M. / Boiano, A. / Bonavolonta, C. / Bose, R. / Brill, A. / Buckley, J. H. / Byrum, K. / Cameron, R. A. / Capasso, M. / Caprai, M. / Covault, C. E. /

Venere, L. Di / Fegan, S. / Feng, Q. / Fiandrini, E. / Furniss, A. / Garczarczyk, M. / Garfias, F. / Gent, A. / Giglietto, N. / Giordano, F. / Gonz'alez, M. M. / Halliday, R. / Hervet, O. / Hughes, G. / Humensky, T. B. / Ionica, M. / Iriarte, A. / Jin, W. / Kaarat, P. / Kieda, D. / Kim, B. / Licciulli, F. / Limon, M. / Loporchio, S. / Masone, V. / Meures, T. / Mode, B. A. W. / Mukherjee, R. / Nieto, D. / Okumura, A. / Otte, N. / Palombara, N. La / Pantaleo, F. R. / Paoletti, R. / Pareschi, G. / Petrashyk, A. / Powell, J. / Powell, K. / Ribeiro, D. / Roache, E. / Rousselle, J. / Rugliancich, A. / Ru'iz-D'iaz-Soto, J. / Santander, M. / Schlenstedt, S. / Scuderi, S. / Shang, R. / Sironi, G. / Stevenson, B. / Stiaccini, L. / Taylor, L. P. / Tosti, L. / Tovmassian, G. / Vagelli, V. / Valentino, M. / Vandenbroucke, J. / Vassiliev, V. V. / Wakely, S. P. / Wilcox, P. / Williams, D. A. / Yu, P.

Abstract: For the first time in the history of ground-based $\gamma$-ray astronomy, the on-axis performance of the dual mirror, aspheric, aplanatic Schwarzschild-Couder optical system has been demonstrated in a $9.7$-m aperture imaging atmospheric Cherenkov ... ...

Abstract	For the first time in the history of ground-based $\gamma$-ray astronomy, the on-axis performance of the dual mirror, aspheric, aplanatic Schwarzschild-Couder optical system has been demonstrated in a $9.7$-m aperture imaging atmospheric Cherenkov telescope. The novel design of the prototype Schwarzschild-Couder Telescope (pSCT) is motivated by the need of the next-generation Cherenkov Telescope Array (CTA) observatory to have the ability to perform wide ($\geq 8^{\circ}$) field-of-view observations simultaneously with superior imaging of atmospheric cascades (resolution of $0.067^{\circ}$ per pixel or better). The pSCT design, if implemented in the CTA installation, has the potential to improve significantly both the $\gamma$-ray angular resolution and the off-axis sensitivity of the observatory, reaching nearly the theoretical limit of the technique and thereby making a major impact on the CTA observatory sky survey programs, follow-up observations of multi-messenger transients with poorly known initial localization, as well as on the spatially resolved spectroscopic studies of extended $\gamma$-ray sources. This contribution reports on the initial alignment procedures and point-spread-function results for the challenging segmented aspheric primary and secondary mirrors of the pSCT.
Keywords	covid19
Publisher	ArXiv
Document type	Article ; Online
DOI	10.1117/12.2568134
Database	COVID19

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Article ; Online: Observation of inverse Compton emission from a long γ-ray burst.

Veres, P / Bhat, P N / Briggs, M S / Cleveland, W H / Hamburg, R / Hui, C M / Mailyan, B / Preece, R D / Roberts, O J / von Kienlin, A / Wilson-Hodge, C A / Kocevski, D / Arimoto, M / Tak, D / Asano, K / Axelsson, M / Barbiellini, G / Bissaldi, E / Dirirsa, F Fana /

Gill, R / Granot, J / McEnery, J / Omodei, N / Razzaque, S / Piron, F / Racusin, J L / Thompson, D J / Campana, S / Bernardini, M G / Kuin, N P M / Siegel, M H / Cenko, S B / O'Brien, P / Capalbi, M / Daì, A / De Pasquale, M / Gropp, J / Klingler, N / Osborne, J P / Perri, M / Starling, R L C / Tagliaferri, G / Tohuvavohu, A / Ursi, A / Tavani, M / Cardillo, M / Casentini, C / Piano, G / Evangelista, Y / Verrecchia, F / Pittori, C / Lucarelli, F / Bulgarelli, A / Parmiggiani, N / Anderson, G E / Anderson, J P / Bernardi, G / Bolmer, J / Caballero-García, M D / Carrasco, I M / Castellón, A / Segura, N Castro / Castro-Tirado, A J / Cherukuri, S V / Cockeram, A M / D'Avanzo, P / Di Dato, A / Diretse, R / Fender, R P / Fernández-García, E / Fynbo, J P U / Fruchter, A S / Greiner, J / Gromadzki, M / Heintz, K E / Heywood, I / van der Horst, A J / Hu, Y-D / Inserra, C / Izzo, L / Jaiswal, V / Jakobsson, P / Japelj, J / Kankare, E / Kann, D A / Kouveliotou, C / Klose, S / Levan, A J / Li, X Y / Lotti, S / Maguire, K / Malesani, D B / Manulis, I / Marongiu, M / Martin, S / Melandri, A / Michałowski, M J / Miller-Jones, J C A / Misra, K / Moin, A / Mooley, K P / Nasri, S / Nicholl, M / Noschese, A / Novara, G / Pandey, S B / Peretti, E / Del Pulgar, C J Pérez / Pérez-Torres, M A / Perley, D A / Piro, L / Ragosta, F / Resmi, L / Ricci, R / Rossi, A / Sánchez-Ramírez, R / Selsing, J / Schulze, S / Smartt, S J / Smith, I A / Sokolov, V V / Stevens, J / Tanvir, N R / Thöne, C C / Tiengo, A / Tremou, E / Troja, E / de Ugarte Postigo, A / Valeev, A F / Vergani, S D / Wieringa, M / Woudt, P A / Xu, D / Yaron, O / Young, D R

Nature

2019 Volume 575, Issue 7783, Page(s) 459–463

Abstract: Long-duration γ-ray bursts (GRBs) originate from ultra-relativistic jets launched from the collapsing cores of dying massive stars. They are characterized by an initial phase of bright and highly variable radiation in the kiloelectronvolt-to- ... ...

Abstract	Long-duration γ-ray bursts (GRBs) originate from ultra-relativistic jets launched from the collapsing cores of dying massive stars. They are characterized by an initial phase of bright and highly variable radiation in the kiloelectronvolt-to-megaelectronvolt band, which is probably produced within the jet and lasts from milliseconds to minutes, known as the prompt emission
Language	English
Publishing date	2019-11-20
Publishing country	England
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, Non-U.S. Gov't
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-019-1754-6
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Article ; Online: Unresolved Gamma-Ray Sky through its Angular Power Spectrum.

Ackermann, M / Ajello, M / Baldini, L / Ballet, J / Barbiellini, G / Bastieri, D / Bellazzini, R / Bissaldi, E / Blandford, R D / Bonino, R / Bottacini, E / Bregeon, J / Bruel, P / Buehler, R / Burns, E / Buson, S / Cameron, R A / Caputo, R / Caraveo, P A /

Cavazzuti, E / Chen, S / Chiaro, G / Ciprini, S / Costantin, D / Cuoco, A / Cutini, S / D'Ammando, F / de la Torre Luque, P / de Palma, F / Desai, A / Digel, S W / Di Lalla, N / Di Mauro, M / Di Venere, L / Fana Dirirsa, F / Favuzzi, C / Franckowiak, A / Fukazawa, Y / Funk, S / Fusco, P / Gargano, F / Gasparrini, D / Giglietto, N / Giordano, F / Giroletti, M / Green, D / Grenier, I A / Guillemot, L / Guiriec, S / Horan, D / Jóhannesson, G / Kuss, M / Larsson, S / Latronico, L / Li, J / Liodakis, I / Longo, F / Loparco, F / Lubrano, P / Magill, J D / Maldera, S / Malyshev, D / Manfreda, A / Mazziotta, M N / Mereu, I / Michelson, P F / Mitthumsiri, W / Mizuno, T / Monzani, M E / Morselli, A / Moskalenko, I V / Negro, M / Nuss, E / Orienti, M / Orlando, E / Palatiello, M / Paliya, V S / Paneque, D / Persic, M / Pesce-Rollins, M / Petrosian, V / Piron, F / Porter, T A / Principe, G / Rainò, S / Rando, R / Razzano, M / Razzaque, S / Reimer, A / Reimer, O / Serini, D / Sgrò, C / Siskind, E J / Spandre, G / Spinelli, P / Suson, D J / Tajima, H / Takahashi, M / Thayer, J B / Tibaldo, L / Torres, D F / Troja, E / Venters, T M / Vianello, G / Wood, K / Yassine, M / Zaharijas, G / Ammazzalorso, S / Fornengo, N / Regis, M

Physical review letters

2019 Volume 121, Issue 24, Page(s) 241101

Abstract: The gamma-ray sky has been observed with unprecedented accuracy in the last decade by the Fermi -large area telescope (LAT), allowing us to resolve and understand the high-energy Universe. The nature of the remaining unresolved emission [unresolved gamma- ...

Abstract	The gamma-ray sky has been observed with unprecedented accuracy in the last decade by the Fermi -large area telescope (LAT), allowing us to resolve and understand the high-energy Universe. The nature of the remaining unresolved emission [unresolved gamma-ray background (UGRB)] below the LAT source detection threshold can be uncovered by characterizing the amplitude and angular scale of the UGRB fluctuation field. This Letter presents a measurement of the UGRB autocorrelation angular power spectrum based on eight years of Fermi-LAT Pass 8 data products. The analysis is designed to be robust against contamination from resolved sources and noise systematics. The sensitivity to subthreshold sources is greatly enhanced with respect to previous measurements. We find evidence (with ∼3.7σ significance) that the scenario in which two classes of sources contribute to the UGRB signal is favored over a single class. A double power law with exponential cutoff can explain the anisotropy energy spectrum well, with photon indices of the two populations being 2.55±0.23 and 1.86±0.15.
Language	English
Publishing date	2019-01-04
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.121.241101
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Article ; Online: Search for Cosmic-Ray Electron and Positron Anisotropies with Seven Years of Fermi Large Area Telescope Data.

Abdollahi, S / Ackermann, M / Ajello, M / Albert, A / Atwood, W B / Baldini, L / Barbiellini, G / Bellazzini, R / Bissaldi, E / Bloom, E D / Bonino, R / Bottacini, E / Brandt, T J / Bruel, P / Buson, S / Caragiulo, M / Cavazzuti, E / Chekhtman, A / Ciprini, S /

Costanza, F / Cuoco, A / Cutini, S / D'Ammando, F / de Palma, F / Desiante, R / Digel, S W / Di Lalla, N / Di Mauro, M / Di Venere, L / Donaggio, B / Drell, P S / Favuzzi, C / Focke, W B / Fukazawa, Y / Funk, S / Fusco, P / Gargano, F / Gasparrini, D / Giglietto, N / Giordano, F / Giroletti, M / Green, D / Guiriec, S / Harding, A K / Jogler, T / Jóhannesson, G / Kamae, T / Kuss, M / Larsson, S / Latronico, L / Li, J / Longo, F / Loparco, F / Lubrano, P / Magill, J D / Malyshev, D / Manfreda, A / Mazziotta, M N / Meehan, M / Michelson, P F / Mitthumsiri, W / Mizuno, T / Moiseev, A A / Monzani, M E / Morselli, A / Negro, M / Nuss, E / Ohsugi, T / Omodei, N / Paneque, D / Perkins, J S / Pesce-Rollins, M / Piron, F / Pivato, G / Principe, G / Rainò, S / Rando, R / Razzano, M / Reimer, A / Reimer, O / Sgrò, C / Simone, D / Siskind, E J / Spada, F / Spandre, G / Spinelli, P / Strong, A W / Tajima, H / Thayer, J B / Torres, D F / Troja, E / Vandenbroucke, J / Zaharijas, G / Zimmer, S

Physical review letters

2017 Volume 118, Issue 9, Page(s) 91103

Abstract: The Large Area Telescope on board the Fermi Gamma-ray Space Telescope has collected the largest ever sample of high-energy cosmic-ray electron and positron events since the beginning of its operation. Potential anisotropies in the arrival directions of ... ...

Abstract	The Large Area Telescope on board the Fermi Gamma-ray Space Telescope has collected the largest ever sample of high-energy cosmic-ray electron and positron events since the beginning of its operation. Potential anisotropies in the arrival directions of cosmic-ray electrons or positrons could be a signature of the presence of nearby sources. We use almost seven years of data with energies above 42 GeV processed with the Pass 8 reconstruction. The present data sample can probe dipole anisotropies down to a level of 10^{-3}. We take into account systematic effects that could mimic true anisotropies at this level. We present a detailed study of the event selection optimization of the cosmic-ray electrons and positrons to be used for anisotropy searches. Since no significant anisotropies have been detected on any angular scale, we present upper limits on the dipole anisotropy. The present constraints are among the strongest to date probing the presence of nearby young and middle-aged sources.
Language	English
Publishing date	2017-03-03
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.118.091103
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Search for Spectral Irregularities due to Photon-Axionlike-Particle Oscillations with the Fermi Large Area Telescope.

Ajello, M / Albert, A / Anderson, B / Baldini, L / Barbiellini, G / Bastieri, D / Bellazzini, R / Bissaldi, E / Blandford, R D / Bloom, E D / Bonino, R / Bottacini, E / Bregeon, J / Bruel, P / Buehler, R / Caliandro, G A / Cameron, R A / Caragiulo, M / Caraveo, P A /

Cecchi, C / Chekhtman, A / Ciprini, S / Cohen-Tanugi, J / Conrad, J / Costanza, F / D'Ammando, F / de Angelis, A / de Palma, F / Desiante, R / Di Mauro, M / Di Venere, L / Domínguez, A / Drell, P S / Favuzzi, C / Focke, W B / Franckowiak, A / Fukazawa, Y / Funk, S / Fusco, P / Gargano, F / Gasparrini, D / Giglietto, N / Glanzman, T / Godfrey, G / Guiriec, S / Horan, D / Jóhannesson, G / Katsuragawa, M / Kensei, S / Kuss, M / Larsson, S / Latronico, L / Li, J / Li, L / Longo, F / Loparco, F / Lubrano, P / Madejski, G M / Maldera, S / Manfreda, A / Mayer, M / Mazziotta, M N / Meyer, M / Michelson, P F / Mirabal, N / Mizuno, T / Monzani, M E / Morselli, A / Moskalenko, I V / Murgia, S / Negro, M / Nuss, E / Okada, C / Orlando, E / Ormes, J F / Paneque, D / Perkins, J S / Pesce-Rollins, M / Piron, F / Pivato, G / Porter, T A / Rainò, S / Rando, R / Razzano, M / Reimer, A / Sánchez-Conde, M / Sgrò, C / Simone, D / Siskind, E J / Spada, F / Spandre, G / Spinelli, P / Takahashi, H / Thayer, J B / Torres, D F / Tosti, G / Troja, E / Uchiyama, Y / Wood, K S / Wood, M / Zaharijas, G / Zimmer, S

Physical review letters

2016 Volume 116, Issue 16, Page(s) 161101

Abstract: We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in the γ-ray spectrum of NGC 1275, the central galaxy of the Perseus cluster. Using 6 years of Fermi Large Area Telescope data, we ... ...

Abstract	We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in the γ-ray spectrum of NGC 1275, the central galaxy of the Perseus cluster. Using 6 years of Fermi Large Area Telescope data, we find no evidence for ALPs and exclude couplings above 5×10^{-12} GeV^{-1} for ALP masses 0.5≲m_{a}≲5 neV at 95% confidence. The limits are competitive with the sensitivity of planned laboratory experiments, and, together with other bounds, strongly constrain the possibility that ALPs can reduce the γ-ray opacity of the Universe.
Language	English
Publishing date	2016-04-22
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.116.161101
Database	MEDical Literature Analysis and Retrieval System OnLINE

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