Results 1 to 10 of about 490,137 (362)

The First LHAASO Catalog of Gamma-Ray Sources [PDF]

The Astrophysical Journal Supplement Series, 2023
We present the first catalog of very-high-energy and ultra-high-energy gamma-ray sources detected by the Large High Altitude Air Shower Observatory. The catalog was compiled using 508 days of data collected by the Water Cherenkov Detector Array from 2021
Zhen Cao, F. Aharonian, Q. An, Axikegu, Y. X. Bai, Y. W. Bao, D. Bastieri, X. J. Bi, Y. J. Bi, J. T. Cai, Q. Cao, W. Y. Cao, Zhe Cao, J. Chang, J. F. Chang, A. M. Chen, E. S. Chen, Liang Chen, Lin Chen, Long Chen, M. J. Chen, M. L. Chen, Q. H. Chen, S. H. Chen, S. Z. Chen, T. L. Chen, Y. Chen, N. Cheng, Y. D. Cheng, M. Y. Cui, S. W. Cui, X. H. Cui, Y. D. Cui, B. Z. Dai, H. L. Dai, Z. G. Dai, Danzengluobu, D. della Volpe, X. Q. Dong, K. K. Duan, J. H. Fan, Y. Z. Fan, J. Fang, K. Fang, C. F. Feng, L. Feng, S. H. Feng, X. T. Feng, Y. L. Feng, S. Gabici, B. Gao, C. D. Gao, L. Q. Gao, Q. Gao, W. Gao, W. K. Gao, M. M. Ge, L. S. Geng, G. Giacinti, G. H. Gong, Q. B. Gou, M. H. Gu, F. L. Guo, X. L. Guo, Y. Q. Guo, Y. Y. Guo, Y. A. Han, H. H. He, H. N. He, J. Y. He, X. B. He, Y. He, M. Heller, Y. K. Hor, B. W. Hou, C. Hou, X. Hou, H. B. Hu, Q. Hu, S. C. Hu, D. H. Huang, T. Q. Huang, W. J. Huang, X. T. Huang, X. Y. Huang, Y. Huang, Z. C. Huang, X. L. Ji, H. Y. Jia, K. Jia, K. Jiang, X. W. Jiang, Z. J. Jiang, M. Jin, M. M. Kang, T. Ke, D. Kuleshov, K. Kurinov, B. B. Li, Cheng Li, Cong Li, D. Li, F. Li, H. B. Li, H. C. Li, H. Y. Li, J. Li, Jian Li, Jie Li, K. Li, W. L. Li, W. L. Li, X. R. Li, Xin Li, Y. Z. Li, Zhe Li, Zhuo Li, E. W. Liang, Y. F. Liang, S. J. Lin, B. Liu, C. Liu, D. Liu, H. Liu, H. D. Liu, J. Liu, J. L. Liu, J. Y. Liu, M. Y. Liu, R. Y. Liu, S. M. Liu, W. Liu, Y. Liu, Y. N. Liu, R. Lu, Q. Luo, H. K. Lv, B. Q. Ma, L. L. Ma, X. H. Ma, J. R. Mao, Z. Min, W. Mitthumsiri, H. J. Mu, Y. C. Nan, A. Neronov, Z. W. Ou, B. Y. Pang, P. Pattarakijwanich, Z. Y. Pei, M. Y. Qi, Y. Q. Qi, B. Q. Qiao, J. J. Qin, D. Ruffolo, A. Sáiz, D. Semikoz, C. Y. Shao, L. Shao, O. Shchegolev, X. D. Sheng, F. W. Shu, H. C. Song, Yu. V. Stenkin, V. Stepanov, Y. Su, Q. N. Sun, X. N. Sun, Z. B. Sun, P. H. T. Tam, Q. W. Tang, Z. B. Tang, W. W. Tian, C. Wang, C. B. Wang, G. W. Wang, H. G. Wang, H. H. Wang, J. C. Wang, K. Wang, L. P. Wang, L. Y. Wang, P. H. Wang, R. Wang, W. Wang, X. G. Wang, X. Y. Wang, Y. Wang, Y. D. Wang, Y. J. Wang, Z. H. Wang, Z. X. Wang, Zhen Wang, Zheng Wang, D. M. Wei, J. J. Wei, Y. J. Wei, T. Wen, C. Y. Wu, H. R. Wu, S. Wu, X. F. Wu, Y. S. Wu, S. Q. Xi, J. Xia, J. J. Xia, G. M. Xiang, D. X. Xiao, G. Xiao, G. G. Xin, Y. L. Xin, Y. Xing, Z. Xiong, D. L. Xu, R. F. Xu, R. X. Xu, W. L. Xu, L. Xue, D. H. Yan, J. Z. Yan, T. Yan, C. W. Yang, F. Yang, F. F. Yang, H. W. Yang, J. Y. Yang, L. L. Yang, M. J. Yang, R. Z. Yang, S. B. Yang, Y. H. Yao, Z. G. Yao, Y. M. Ye, L. Q. Yin, N. Yin, X. H. You, Z. Y. You, Y. H. Yu, Q. Yuan, H. Yue, H. D. Zeng, T. X. Zeng, W. Zeng, M. Zha, B. B. Zhang, F. Zhang, H. M. Zhang, H. Y. Zhang, J. L. Zhang, L. X. Zhang, Li Zhang, P. F. Zhang, P. P. Zhang, R. Zhang, S. B. Zhang, S. R. Zhang, S. S. Zhang, X. Zhang, X. P. Zhang, Y. F. Zhang, Yi Zhang, Yong Zhang, B. Zhao, J. Zhao, L. Zhao, L. Z. Zhao, S. P. Zhao, F. Zheng, B. Zhou, H. Zhou, J. N. Zhou, M. Zhou, P. Zhou, R. Zhou, X. X. Zhou, C. G. Zhu, F. R. Zhu, H. Zhu, K. J. Zhu, X. Zuo, (The LHAASO Collaboration)   +280 more
doaj   +2 more sources

SIX NEW MILLISECOND PULSARS FROM ARECIBO SEARCHES OF FERMI GAMMA-RAY SOURCES [PDF]

, 2016
We have discovered six radio millisecond pulsars (MSPs) in a search with the Arecibo telescope of 34 unidentified gamma-ray sources from the Fermi Large Area Telescope (LAT) four year point source catalog.
H. T. Cromartie, F. Camilo, M. Kerr, J. S. Deneva, S. M. Ransom, P. S. Ray, E. C. Ferrara, P. F. Michelson, K. S. Wood   +8 more
openalex   +3 more sources

Radio Morphology of Gamma-Ray Sources: Double-lobed Radio Sources [PDF]

The Astrophysical Journal
The extragalactic γ -ray sky is dominated by relativistic jets aligned to the observer’s line of sight, i.e., blazars. A few of their misaligned counterparts, e.g., radio galaxies, are also detected with the Fermi-Large Area Telescope (LAT), albeit in a ...
Vaidehi S. Paliya, D. J. Saikia, Alberto Domínguez, C. S. Stalin   +3 more
doaj   +2 more sources

On the Potential of Bright, Young Pulsars to Power Ultrahigh Gamma-Ray Sources [PDF]

Astrophysical Journal Letters, 2022
The recent discovery of a new population of ultrahigh-energy gamma-ray sources with spectra extending beyond 100 TeV revealed the presence of Galactic PeVatrons—cosmic-ray factories accelerating particles to PeV energies.
E. de Oña Wilhelmi, R. L'opez-Coto, E. Amato, F. Aharonian   +3 more
semanticscholar   +1 more source

The TRAPUM L-band survey for pulsars in Fermi-LAT gamma-ray sources [PDF]

, 2022
More than 100 millisecond pulsars (MSPs) have been discovered in radio observations of gamma-ray sources detected by the Fermi Large Area Telescope (LAT), but hundreds of pulsar-like sources remain unidentified.
C. Clark, R. Breton, E. Barr, M. Burgay, T. Thongmeearkom, L. Nieder, S. Buchner, B. Stappers, M. Kramer, W. Becker, M. Mayer, A. Phosrisom, A. Ashok, M. Bezuidenhout, F. Calore, I. Cognard, P. Freire, M. Geyer, J. Grießmeier, R. Karuppusamy, L. Levin, P. Padmanabh, A. Possenti, S. Ransom, M. Serylak, V. V. Krishnan, L. Vleeschower, J. Behrend, D. Champion, W. Chen, D. Horn, E. Keane, L. Kunkel, Y. Men, A. Ridolfi, V. Dhillon, T. Marsh, M. Papa   +37 more
semanticscholar   +1 more source

3HWC: The Third HAWC Catalog of Very-high-energy Gamma-Ray Sources [PDF]

Astrophysical Journal, 2020
We present a new catalog of TeV gamma-ray sources using 1523 days of data from the High-Altitude Water Cherenkov (HAWC) Observatory. The catalog represents the most sensitive survey of the northern gamma-ray sky at energies above several TeV, with three ...
A. Albert, R. Alfaro, C. Alvarez, J. Camacho, J. C. Arteaga-Vel'azquez, K. Arunbabu, D. Rojas, H. Solares, V. Baghmanyan, E. Belmont-Moreno, S. Benzvi, C. Brisbois, K. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, U. Cotti, S. León, E. D. L. Fuente, R. Hernández, L. Díaz-Cruz, B. Dingus, M. DuVernois, M. Durocher, J. C. Díaz-Vélez, R. Ellsworth, K. Engel, C. Espinoza, K. Fan, K. Fang, M. F. Alonso, H. Fleischhack, N. Fraija, A. Galván-Gámez, D. García, J. García-González, F. Garfias, G. Giacinti, M. Gonz'alez, J. Goodman, J. P. Harding, S. Hernández, J. Hinton, B. Hona, D. Huang, F. Hueyotl-Zahuantitla, P. Hüntemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, D. Kieda, A. Lara, William H. Lee, H. L. Vargas, J. Linnemann, A. Longinotti, G. Luis-Raya, J. Lundeen, R. L'opez-Coto, K. Malone, V. Marandon, O. Martinez, I. Martinez-Castellanos, J. Mart'inez-Castro, J. Matthews, P. Miranda-Romagnoli, J. Morales-Soto, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, M. Newbold, M. Nisa, R. Noriega-Papaqui, L. Olivera-Nieto, N. Omodei, A. Peisker, Y. Araujo, E. Pérez-Pérez, Z. Ren, C. Rho, C. Rivière, D. Rosa-González, E. Ruiz-Velasco, H. Salazar, F. Greus, A. Sandoval, M. Schneider, H. Schoorlemmer, F. Serna, G. Sinnis, A. Smith, R. Springer, P. Surajbali, E. Tabachnick, K. Tollefson, I. Torres, R. Torres-Escobedo, T. Ukwatta, F. Ureña-Mena, T. Weisgarber, Felix Werner, E. Willox, A. Zepeda, Hong-lei Zhou, C. D. Le'on, J. Álvarez   +106 more
semanticscholar   +1 more source

On the Properties of Inverse Compton Spectra Generated by Upscattering a Power-law Distribution of Target Photons

The Astrophysical Journal, 2023
Relativistic electrons are an essential component in many astrophysical sources, and their radiation may dominate the high-energy bands. Inverse Compton (IC) emission is the radiation mechanism that plays the most important role in these bands. The basic
Dmitry Khangulyan, Felix Aharonian, Andrew M. Taylor   +2 more
doaj   +1 more source

Limits on Leptonic TeV Emission from the Cygnus Cocoon with Swift-XRT

The Astrophysical Journal, 2023
γ -ray observations of the Cygnus Cocoon, an extended source surrounding the Cygnus X star-forming region, suggest the presence of a cosmic-ray accelerator reaching energies up to a few PeV.
David Guevel, Andrew Beardmore, Kim L. Page, Amy Lien, Ke Fang, Luigi Tibaldo, Sabrina Casanova, Petra Huentemeyer   +7 more
doaj   +1 more source

Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth [PDF]

Science, 2017
Exotic origin for cosmic positrons Several cosmic-ray detectors have found more positrons arriving at Earth than expected. Some researchers interpret this as a signature of exotic physics, such as the annihilation of dark matter particles.
A. Abeysekara, A. Albert, R. Alfaro, C. Alvarez, J. Álvarez, R. Arceo, J. C. Arteaga-Velázquez, D. Avila Rojas, H. Ayala Solares, A. Barber, N. Bautista-Elivar, A. Becerril, E. Belmont-Moreno, S. Benzvi, D. Berley, A. Bernal, J. Braun, C. Brisbois, K. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, M. Castillo, U. Cotti, J. Cotzomi, S. Coutiño de León, C. de León, E. de la Fuente, B. Dingus, M. DuVernois, J. C. Díaz-Vélez, R. Ellsworth, K. Engel, O. Enŕıquez-Rivera, D. Fiorino, N. Fraija, J. García-González, F. Garfias, M. Gerhardt, A. Gonzalez Muñoz, M. González, J. Goodman, Z. Hampel-Arias, J. P. Harding, S. Hernández, A. Hernández-Almada, J. Hinton, B. Hona, C. Hui, P. Hüntemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, S. Kaufmann, D. Kieda, A. Lara, R. Lauer, W. Lee, D. Lennarz, H. L. Vargas, J. Linnemann, A. Longinotti, G. Luis Raya, R. Luna-García, R. López-Coto, K. Malone, S. Marinelli, O. Martinez, I. Martinez-Castellanos, J. Martínez-Castro, H. Martínez-Huerta, J. Matthews, P. Miranda-Romagnoli, E. Moreno, M. Mostafá, L. Nellen, M. Newbold, M. Nisa, R. Noriega-Papaqui, R. Pelayo, J. Pretz, E. Pérez-Pérez, Z. Ren, C. Rho, C. Rivière, D. Rosa-González, M. Rosenberg, E. Ruiz-Velasco, H. Salazar, F. Salesa Greus, A. Sandoval, M. Schneider, H. Schoorlemmer, G. Sinnis, A. Smith, R. Springer, P. Surajbali, I. Taboada, O. Tibolla, K. Tollefson, I. Torres, T. Ukwatta, G. Vianello, T. Weisgarber, S. Westerhoff, I. Wisher, J. Wood, T. Yapici, G. Yodh, P. Younk, A. Zepeda, H. Zhou, F. Guo, J. Hahn, H. Li, H. Zhang   +115 more
semanticscholar   +1 more source

Evidence for Two Distinct Populations of Kilonova-associated Gamma-Ray Bursts

The Astrophysical Journal Letters, 2023
Identification of gamma-ray burst (GRB) progenitors based on the duration of their prompt emission ( T _90 ) has faced several roadblocks recently. Long-duration GRBs (with T _90 > 2 s) have traditionally been thought to be originating from the collapse ...
Dimple, K. Misra, K. G. Arun
doaj   +1 more source