Discovery of Emission Pulses from Magnetar SGR 1935+2154
Astronomy Reports - 2022
Tóm tắt
In the paper, observation results of the magnetar SGR 1935+2154 at the frequency 111 MHz by the LPA (BSA) FIAN radio telescope are presented. For the search of single non-periodic pulses, we used data recorded in the six-frequency channel mode with a temporal resolution of 0.1 s in the receiver band 110.25 ± 1.25 MHz. As a result of data analysis for the period from September 1, 2019 to March 1, 2021, a pulse was detected with a dispersion measure
$$DM = 320 \pm 10$$
pc/cm3, scattering value
$$\tau \sim 340$$
ms, and a fluence
$$f\sim 300$$
Jy ms. To search for periodic pulses, we used data recorded in the 32-channel mode in the receiver band 109–111.5 MHz in January–February and October–December, 2020. As a result, in two sessions, periodic radiation was found with a period of 3.247 s, an amplitude of 40 mJy, and dispersion measure DM = 320 pc/cm3.
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Tài liệu tham khảo
R. C. Duncan and C. Thompson, Astrophys. J. 392, L9 (1992).
B. Paczynski, Acta Astron. 42, 1 (1992).
T. L. Cline, U. D. Desai, G. Pizzichini, B. J. Teegarden, et al., Astrophys. J. 237, L1 (1980).
K. Hurley, T. Cline, E. Mazets, S. Barthelmy, et al., Nature (London, U.K.) 397 (6714), 41 (1999).
A. D. Kuz’min and B. Ya. Losovskii, Astron. Lett. 25, 108 (1999).
S. A. Olausen and V. M. Kaspi, Astrophys. J. Suppl. 212, 6 (2014).
R. Nanda, Chandra Proposal, No. 15508481 (2014).
A. V. Kozlova, G. L. Israel, D. S. Svinkin, D. D. Frederiks, et al., Mon. Not. R. Astron. Soc. 460, 2008 (2016).
R. Kothes, X. Sun, B. Gaensler, and W. Reich, Astrophys. J. 852, 54 (2018).
A. Ridnaia, S. Golenetskii, R. Aptekar, D. Frederiks, et al., GRB Coord. Network, Circ. Service, No. 26242 (2019).
D. M. Palmer, Astron. Telegram, No. 13675 (2020).
P. Scholz, Astron. Telegram, No. 13681 (2020).
J. M. Cordes and T. J. W. Lazio, arXiv: astro-ph/0207156 (2002).
C. Bochenek, S. Kulkarni, V. Ravi, D. McKenna, G. Hallinan, and K. Belov, Astron. Telegram, No. 13684 (2020).
Ya. N. Istomin, Mon. Not. R. Astron. Soc. 478, 4348 (2018).
D. R. Lorimer, M. Bailes, M. A. McLaughlin, D. J. Narkevic, and F. Crawford, Science (Washington, DC, U.S.) 318 (5851), 777 (2007).
M. Burgay, M. Pilia, G. Bernardi, G. Naldi, et al., Astron. Telegram, No. 13783 (2020).
C. Zhang, J. C. Jiang, Y. P. Men, B. J. Wang, et al., Astron. Telegram, No. 13699 (2020).
V. V. Oreshko, G. A. Latyshev, I. A. Alekseev, Yu. I. Azarenkov, B. I. Ivanov, V. M. Karpov, and V. I. Kostromin, Tr. IPA 24, 80 (2012).
V. A. Fedorova and A. E. Rodin, Astron. Rep. 63, 39 (2019).
V. A. Fedorova and A. E. Rodin, Astron. Rep. 63, 877 (2019).
A. Rodin and V. Fedorova, Astron. Telegram, No. 14186 (2020).
W. Zhu, B. Wang, D. Zhou, X. Dejiang, et al., Astron. Telegram, No. 14084 (2020).
B. C. Andersen, K. M. Bandura, M. Bhardwaj, A. Bij, et al., Nature (London, U.K.) 587 (7832), 54 (2020).
C. D. Bochenek, V. Ravi, K. V. Belov, G. Hallinan, J. Kocz, S. R. Kulkarni, and D. L. McKenna, Nature (London, U.K.) 587 (7832), 59 (2020).
F. Kirsten, M. Snelders, M. Jenkins, K. Nimmo, J. van den Eijnden, J. W. T. Hessels, M. P. Gawronski, and J. Yang, Nat. Astron. 5, 414 (2021).