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The First Detection of an Orphan Burst at the Rise Phase

We report on the earliest detection of the optical transient MASTER OT J123248.62-012924.5 coincident within the error box with the optical and X-ray transient AT2021lfa/ZTF21aayokph. In our images the brightness of the object rises monotonically with confidence. We interpret this transient as a gam...

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Bibliographic Details
Published in:Astronomy letters 2022-11, Vol.48 (11), p.623-635
Main Authors: Lipunov, V. M., Kornilov, V. G., Topolev, V. V., Tyurina, N. V., Gorbovskoy, E. S., Simakov, S. G., Zhirkov, K. K., Vlasenko, D. S., Francile, C., Podesta, R., Podesta, F., Svinkin, D. S., Budnev, N. M., Balanutsa, P. V., Cheryasov, D. V., Chasovnikov, A. R., Rebolo, R., Serra-Ricart, M., Gress, O. A., Ershova, O. A., Yurkov, V. V., Gabovich, A. S., Tlatov, A. G., Minkina, E. M., Vladimirov, V. V., Kuznetsov, A. S., Antipov, G. A., Svertilov, S. I., Tselik, Yu, Kechin, Ya
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Language:English
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Summary:We report on the earliest detection of the optical transient MASTER OT J123248.62-012924.5 coincident within the error box with the optical and X-ray transient AT2021lfa/ZTF21aayokph. In our images the brightness of the object rises monotonically with confidence. We interpret this transient as a gamma-ray burst (GRB) characterized by smooth optical self-similar (SOSS) emission, while the nondetection of gamma-ray emission at space observatories is interpreted in terms of the hypothesis of a ‘‘failed’’ GRB. Thus, this is the first detection of a nonmonotonic orphan burst.
ISSN:1063-7737
1562-6873
DOI:10.1134/S1063773722110093