TY  - JOUR
AU  - Acharyya, Atreya
AU  - Adams, Colin B.
AU  - Bangale, Priyadarshini
AU  - Bartkoske, Joshua T.
AU  - Benbow, Wystan
AU  - Buckley, J. H.
AU  - Chen, Yu
AU  - Christiansen, Jodi L.
AU  - Chromey, Alisha J.
AU  - Duerr, Anne
AU  - Errando, Manel
AU  - Godoy, Miguel E.
AU  - Falcone, Abe
AU  - Feldman, Sydney
AU  - Feng, Qi
AU  - Foote, Juniper
AU  - Fortson, Lucy
AU  - Furniss, Amy
AU  - Hanlon, William
AU  - Hanna, David
AU  - Hervet, Olivier
AU  - Hinrichs, Claire E.
AU  - Holder, Jamie
AU  - Humensky, Thomas B.
AU  - Jin, Weidong
AU  - Johnson, Madalyn N.
AU  - Kaaret, Philip
AU  - Kertzman, Mary
AU  - Kherlakian, Maria
AU  - Kieda, David
AU  - Kleiner, Tobias K.
AU  - Korzoun, Nikolas
AU  - Krennrich, Frank
AU  - Kumar, Sajan
AU  - Lang, Mark J.
AU  - Lundy, Matthew
AU  - Maier, Gernot
AU  - Millard, Matthew J.
AU  - Mooney, Connor L.
AU  - Moriarty, Patrick
AU  - Mukherjee, Reshmi
AU  - Ning, Wenmeng
AU  - Brien, Stephan Ó.
AU  - Ong, Rene A.
AU  - Pohl, Martin
AU  - Pueschel, Elisa
AU  - Quinn, John
AU  - Rabinowitz, Pazit L.
AU  - Ragan, Kenneth J.
AU  - Reynolds, Paul T.
AU  - Ribeiro, Deivid
AU  - Roache, Emmet
AU  - Sadeh, Iftach
AU  - Saha, Lab
AU  - Santander, Marcos
AU  - Sembroski, Glenn H.
AU  - Shang, Ruo
AU  - Splettstoesser, Megan
AU  - Tak, D.
AU  - Talluri, Anjana K.
AU  - Tucci, James V.
AU  - Vassiliev, Vladimir V.
AU  - Williams, David A.
AU  - Wong, Samantha L.
AU  - Woo, Jooyun
TI  - An In-depth Study of Gamma Rays from the Starburst Galaxy M82 with VERITAS
JO  - The astrophysical journal / Part 1
VL  - 981
IS  - 2
SN  - 0004-637X
CY  - London
PB  - Institute of Physics Publ.
M1  - PUBDB-2025-04857
M1  - arXiv:2501.09998
M1  - arXiv:2501.09998
SP  - 189 
PY  - 2025
N1  - 15 pages, 7 figures; Accepted for the publication in The Astrophysical Journal (ApJ)
AB  - Assuming Galactic cosmic rays originate in supernovae and the winds of massive stars, starburst galaxies should produce very-high-energy (VHE; E > 100 GeV) gamma-ray emission via the interaction of their copious quantities of cosmic rays with the large reservoirs of dense gas within the galaxies. Such VHE emission was detected by VERITAS from the starburst galaxy M82 in 2008–09. An extensive, multiyear campaign followed these initial observations, yielding a total of 254 hr of good-quality VERITAS data on M82. Leveraging modern analysis techniques and the larger exposure, these VERITAS data show a more statistically significant VHE signal (∼6.5 standard deviations, σ). The corresponding photon spectrum is well fit by a power law (Γ = 2.3 ± 0.3<sub>stat</sub> ± 0.2<sub>sys</sub>), and the observed integral flux is F (>450 GeV) = (3.2 ± 0.6<sub>stat</sub> ± 0.6<sub>sys</sub>) × 10<sup>−13</sup> cm<sup>−2</sup> s<sup>−1</sup>, or ∼0.4
LB  - PUB:(DE-HGF)16
DO  - DOI:10.3847/1538-4357/adab71
UR  - https://bib-pubdb1.desy.de/record/640718
ER  -