{
  "bibcode": "2010GCN.11308....1Y",
  "body": "M. Yoshida, K. S. Kawabata (HASC, Hiroshima U.), Gamal B. Ali,\nA. Haroon, A. Essam, I. Zead, A. Nakhlawy, and M. Ismail (NRIAG,\nEgypt) report:\n\nWe observed GRB 100925A / MAXI J1659-152 (Mangano et al., GCN\n11296;Barthelmy et al., GCN 11300; Marshall et al. GCN 11298;\nNegoro et al.ATEL 2873) with the Newtonian CCD camera attached to\nthe 188 cm telescope of Kottamia Astronomical Observatory in Egypt\non September 26 2010. We measured the brightness of this possible\nX-ray binary (Ugarte Postigo et al. GCN 11307) in B, V, R and I\nbands. Results of the photometry are listed below. We used a\nnearby USNO B1.0 star (USNO 0747-0361593) for photometric\ncalibration.\n\nband        START-UT        T-EXP[sec]   mag.(Vega)  error(*)\n-------------------------------------------------------------\nB     2010-09-26 18:11:24   300.0        16.64       0.08\nV($)  2010-09-26 18:17:05   180.0        16.33       0.06\nR     2010-09-26 17:59:24   120.0        16.11       0.05\nI     2010-09-26 18:01:59   120.0        15.87       0.04\n-------------------------------------------------------------\n\n(*) Poisson noise error only.\n($) We interpolated the B2 and the R2 magnitudes of the\ncomparison star to estimate the V band magnitude of the star.",
  "circularId": 11308,
  "createdOn": 1285529870000,
  "email": "yoshidam@hiroshima-u.ac.jp",
  "subject": "GRB 100925A / MAXI J1659-152: Optical observation with the Kottamia 188cm telescope",
  "submitter": "Michitoshi Yoshida at HASC,Hiroshima U  <yoshidam@hiroshima-u.ac.jp>",
  "eventId": "GRB 100925A"
}