γ-Ray Emission from Classical Nova V392 Per: Measurements from Fermi and HAWC
Lee, W. H.; Alvarez, C.; Hernandez, S.; Omodei, N.; Tibolla, O.; Wang, X.; Smith, A. J.; Longinotti, A. L.; Aydi, E.; Albert, A.; Lara, A.; Metzger, B. D.; Marandon, V.; Casanova, S.; Zhou, H.; Fraija, N.; Rosa-González, D.; Chomiuk, L.; Vurm, I.; Fang, K.; Li, K. L.; Dingus, B. L.; Carramiñana, A.; Martinez, O.; Turner, R.; Moreno, E.; Goodman, J. A.; Ruiz-Velasco, E.; Alfaro, R.; Arteaga-Velázquez, J. C.; Avila Rojas, D.; Ayala Solares, H. A.; Belmont-Moreno, E.; Caballero-Mora, K. S.; Capistrán, T.; Cotti, U.; Cotzomi, J.; De la Fuente, E.; de León, C.; Diaz Hernandez, R.; Espinoza, C.; García-González, J. A.; Garfias, F.; González, M. M.; Harding, J. P.; Huang, D.; Hueyotl-Zahuantitla, F.; Hüntemeyer, P.; Iriarte, A.; Joshi, V.; Luis-Raya, G.; Malone, K.; Martínez-Castro, J.; Matthews, J. A.; Miranda-Romagnoli, P.; Nayerhoda, A.; Nellen, L.; Newbold, M.; Noriega-Papaqui, R.; Pérez-Pérez, E. G.; Rho, C. D.; Sandoval, A.; Springer, R. W.; Torres, I.; Ureña-Mena, F.; Villaseñor, L.; Zepeda, A.; DuVernois, M. A.; Díaz-Vélez, J. C.; Durocher, M.; Fan, K. L.; Linnemann, J. T.; Lundeen, J.; Morales-Soto, J. A.; Mostafá, M.; Nisa, M. U.; Peisker, A.; Pérez Araujo, Y.; Serna-Franco, J.; Tollefson, K.; Torres-Escobedo, R.; Willox, E.; Babu, R.; Blochwitz, C.; Chaparro-Amaro, O.; Coutiño de León, S.; Engel, K.; Hinton, J.; Salazar-Gallegos, D.; Greus, F. Salesa; Son, Y.; HAWC Collaboration
United States, Mexico, Poland, Germany, South Korea, Spain, China, Taiwan, Estonia
Abstract
This paper reports on the γ-ray properties of the 2018 Galactic nova V392 Per, spanning photon energies ~0.1 GeV-100 TeV by combining observations from the Fermi Gamma-ray Space Telescope and the HAWC Observatory. As one of the most rapidly evolving γ-ray signals yet observed for a nova, GeV γ-rays with a power-law spectrum with an index Γ = 2.0 ± 0.1 were detected over 8 days following V392 Per's optical maximum. HAWC observations constrain the TeV γ-ray signal during this time and also before and after. We observe no statistically significant evidence of TeV γ-ray emission from V392 Per, but present flux limits. Tests disfavor the extension of the Fermi Large Area Telescope spectrum to energies above 5 TeV by 2 standard deviations (95%) or more. We fit V392 Per's GeV γ-rays with hadronic acceleration models, incorporating optical observations, and compare the calculations with HAWC limits.