{
  "circularId": 36501,
  "subject": "GRB 240514E: A possible candidate BD-21 1074",
  "submitter": "tmihara@riken.jp",
  "submittedHow": "web",
  "bibcode": "2024GCN.36501....1M",
  "createdOn": 1715914852507,
  "format": "text/plain",
  "body": "T. Mihara (RIKEN), Y. Tsuboi (Chuo U.), W. Iwakiri (Chiba U.), H. Negoro, M. Nakajima, Y. Kudo, H. Shibui, K. Takagi, H. Takahashi, K. Tatano, H. Nishio (Nihon U.), T. Kawamuro, S. Yamada, S. Wang, T. Tamagawa, N. Kawai, M. Matsuoka (RIKEN), T. Sakamoto, M. Serino, S. Sugita, Y. Kawakubo, H. Hiramatsu, H. Nishikawa, Y. Kondo, A. Yoshida (AGU), H. Sugai, N. Nagashima (Chuo U.), M. Shidatsu, Y. Niida (Ehime U.), I. Takahashi, M. Niwano, N. Higuchi, Y. Yatsu (Tokyo Tech), S. Nakahira, S. Ueno, H. Tomida, M. Ishikawa, S. Ogawa, M. Kurihara (JAXA), Y. Ueda, Y. Okada (Kyoto U.), M. Yamauchi, Y. Otsuki, T. Hasegawa, M. Nishio (Miyazaki U.), K. Yamaoka (Nagoya U.), M. Sugizaki (NAOC) report on behalf of the MAXI team:\n\nThis is a cross post of ATel #16622.\n\nMAXI team reported a possible GRB afterglow, GRB 240514E (GCN 36485).\nIt is not confirmed yet, as Swift cannot follow-up this region for a week. \nWe report here that there is a flare star system BD-21 1074 in the MAXI error box.\nIt is also an X-ray source 1RXS J050649.5-213505 in the ROSAT catalog \n(0.8e-11 erg/s/cm2 in 0.1-2.4 keV) in Hunsch et al. 1999 (A&AS 135, 319).\nBecause the nearby stars above this ROSAT flux level are about 90 stars scattering\nall over the sky, \nthe chance coincidence of a GRB and a flare star is rare.\nThere is no counterpart in the 3MAXI 7-year catalog with the sensitivity of 0.6e-11 erg/s/cm2 in 4-10 keV.\nIf it was a flare from BD-21 1074, it would be the first detection with MAXI,\nand also the first detection of X-ray flare from BD-21 1074.\n<br>\nBD-21 1074ABC are dMe stars triplet at the distance of 19.8 pc (Gaia DR3).\nOptical flares were reported in Messina et al. 2014 (A&A 570, 19). \nThe observational results with MAXI are consistent with a stellar flare, i.e. \nsoft X-ray spectrum, no variability during the scan,\nno detection in the previous scan at 92 min before,\nand no detection in the next scan at 19 h later.\nThe measured X-ray luminosity was 1.0e32 erg/s,\nwhich is the highest class of flares as a dMe star. \n<br>\nSince BD-21 1074 might be in an active phase,\noptical spectroscopic observations are recommended.\n",
  "eventId": "GRB 240514E"
}