SIMBAD references

2023Natur.623..927H - Nature, 623, 927-931 (2023/November-0)

Minutes-duration optical flares with supernova luminosities.

HO A.Y.Q., PERLEY D.A., CHEN P., SCHULZE S., DHILLON V., KUMAR H., SURESH A., SWAIN V., BREMER M., SMARTT S.J., ANDERSON J.P., ANUPAMA G.C., AWIPHAN S., BARWAY S., BELLM E.C., BEN-AMI S., BHALERAO V., DE BOER T., BRINK T.G., BURRUSS R., CHANDRA P., CHEN T.-W., CHEN W.-P., COOKE J., COUGHLIN M.W., DAS K.K., DRAKE A.J., FILIPPENKO A.V., FREEBURN J., FREMLING C., FULTON M.D., GAL-YAM A., GALBANY L., GAO H., GRAHAM M.J., GROMADZKI M., GUTIERREZ C.P., HINDS K.-R., INSERRA C., NAYANA A.J., KARAMBELKAR V., KASLIWAL M.M., KULKARNI S., MULLER-BRAVO T.E., MAGNIER E.A., MAHABAL A.A., MOORE T., NGEOW C.-C., NICHOLL M., OFEK E.O., OMAND C.M.B., ONORI F., PAN Y.-C., PESSI P.J., PETITPAS G., POLISHOOK D., POSHYACHINDA S., PURSIAINEN M., RIDDLE R., RODRIGUEZ A.C., RUSHOLME B., SEGRE E., SHARMA Y., SMITH K.W., SOLLERMAN J., SRIVASTAV S., STROTJOHANN N.L., SUHR M., SVINKIN D., WANG Y., WISEMAN P., WOLD A., YANG S., YANG Y., YAO Y., YOUNG D.R. and ZHENG W.

Abstract (from CDS):

In recent years, certain luminous extragalactic optical transients have been observed to last only a few days. Their short observed duration implies a different powering mechanism from the most common luminous extragalactic transients (supernovae), whose timescale is weeks. Some short-duration transients, most notably AT2018cow (ref. ), show blue optical colours and bright radio and X-ray emission. Several AT2018cow-like transients have shown hints of a long-lived embedded energy source, such as X-ray variability, prolonged ultraviolet emission, a tentative X-ray quasiperiodic oscillation and large energies coupled to fast (but subrelativistic) radio-emitting ejecta. Here we report observations of minutes-duration optical flares in the aftermath of an AT2018cow-like transient, AT2022tsd (the 'Tasmanian Devil'). The flares occur over a period of months, are highly energetic and are probably nonthermal, implying that they arise from a near-relativistic outflow or jet. Our observations confirm that, in some AT2018cow-like transients, the embedded energy source is a compact object, either a magnetar or an accreting black hole.

Abstract Copyright: 2023 The Author(s), under exclusive licence to Springer Nature Limited

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