{
  "bibcode": "2015GCN.18571....1K",
  "body": "H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), A. Y. Lien (GSFC/UMBC),\nC. B. Markwardt (GSFC), and D. M. Palmer (LANL) report on behalf of \nthe Swift-BAT team:\n\nWe perform further investigation regarding the uncertainty of the source nature \nof GRB151107A (Lien et al., GCN Circ. 18564) due to its proximity to the \nGalactic plane (within 1 deg) and the featureless light curve.\n\nUsing analysis from the BAT transient monitor (Krimm et al., 2013), there is \nno significant emission in the 15-50 keV band at ~ 4000 s before and ~ 6000 s\nafter the event data (signal-to-noise ratio < 1.8 sigma). The source was out of \nthe field of view for the immediate time outside the event data range due to\npre-planned telescope slews. A search in the daily mosaic images at the burst \nlocation shows a 4-sigma detection on Nov. 7 (12.5 mCrab) and 1.6 sigma on \nNov. 8 (which corresponds to a 1-sigma upper limit of ~ 5 mCrab).\n\nThis flux level and time profile are consistent with a GRB, and appear dimmer \nand shorter than a usual accreting binary source during outburst. However, \nwe cannot rule out other possible Galactic transients, such as thermonuclear \nbursts or flaring stars.\n\nIn addition, we note that within 20.3 arcsec of the revised BAT position is the \nbright M2/M3 type star designated HD 126577. It is possible that the BAT \ndetections correspond to a flaring episode from HD 126577, although this \nstar is not known for such episodes.",
  "circularId": 18571,
  "createdOn": 1447106811000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 151107A: Further investigation of the source nature",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 151107A"
}