GCN OPS NOTE (01mar03): This is not a GRB. The INTEGRAL team has determined from post-burst offline analysis that this is NOT a GRB. ////////////////////////////////////////////////////////////////////// TITLE: GCN/INTEGRAL NOTICE NOTICE_DATE: Fri 28 Feb 03 21:55:36 UT NOTICE_TYPE: INTEGRAL Wakeup TRIGGER_NUM: 225, Sub_Num: 0 GRB_RA: 269.2840d {+17h 57m 08s} (J2000), 269.3382d {+17h 57m 21s} (current), 268.4272d {+17h 53m 43s} (1950) GRB_DEC: -37.8483d {-37d 50' 53"} (J2000), -37.8485d {-37d 50' 54"} (current), -37.8427d {-37d 50' 33"} (1950) GRB_ERROR: 4.65 [arcmin, radius, statistical only] GRB_INTEN: 7.31 [sigma] GRB_TIME: 78764.40 SOD {21:52:44.40} UT GRB_DATE: 12698 TJD; 59 DOY; 03/02/28 SC_RA: 257.36 [deg] (J2000) SC_DEC: -35.67 [deg] (J2000) SUN_POSTN: 341.44d {+22h 45m 45s} -7.86d {-07d 51' 28"} SUN_DIST: 71.07 [deg] MOON_POSTN: 318.10d {+21h 12m 24s} -21.13d {-21d 07' 37"} MOON_DIST: 45.03 [deg] GAL_COORDS: 353.53, -6.59 [deg] galactic lon,lat of the burst ECL_COORDS: 269.42,-14.41 [deg] ecliptic lon,lat of the burst COMMENTS: INTEGRAL GRB Coordinates. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1912 SUBJECT: GRB 030228, optical observations DATE: 03/03/01 19:12:58 GMT FROM: Peter Garnavich at U of Notre Dame K. von Braun (DTM), P. Garnavich (Notre Dame), K. Stanek (CfA) We imaged the error circle of the INTEGRAL trigger 225 with the 1-m Swope telescope on Mar. 1.38 (UT) which is 11 hours after the burst. A single 600s exposure was obtained in the I-band. This is a low Galactic latitude field but extinction in this direction is only 0.6 mag in the I-band based on the Schlegel, Finkbeiner & Davis (1998, ApJ, 500, 525) maps. Stellar crowding limits the detection threshold to rather bright magnitudes. Compared with the digitized sky survey IR plate we find no new sources within the 10' diameter error circle down to I=19 based on a rough calibration with a Landolt standard field. We do find an existing star which is significantly brighter in our CCD image than on the DSS plate at 17:56:44.46 -37:52:57 (2000) which we identify as the infrared source IRAS 17533-3752 and its detection is probably due to a combination of a large IR excess and a filter mismatch. This message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1913 SUBJECT: 030228: NOT A GRB DATE: 03/03/01 21:21:53 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti for the IBAS Localization Team communicates: Offline analysis of the INTEGRAL data regarding the possible GRB detected on 2003-02-28 at 21:52:44.4008 UTC (IBAS Alert Packet n.129) reveal that this trigger was a false event not related to a GRB. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1918 SUBJECT: IPN triangulation of GRB030228 (annulus) DATE: 03/03/03 20:26:01 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the Ulysses GRB team, A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W. Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, and T. Cline, on behalf of the Ulysses and Konus GRB teams, report: Ulysses, INTEGRAL (SPI-ACS), RHESSI, and Konus-Wind observed this GRB at 73606 seconds. As observed by Ulysses, it had a duration of approximately 15 seconds, a 25-100 keV fluence of approximately 2.0E-06 erg/cm2, and a peak flux of approximately 4.9E-07 erg/cm2 s over 0.50 seconds. We have triangulated it to a preliminary annulus centered at RA, Decl (2000)= 347.624, -42.117 degrees, whose radius is 84.182 +/- 0.157 degrees (3 sigma). This annulus may be constrained and/or improved, but at this stage it is not clear whether this event was observed by Mars Odyssey, and thus whether a small error box can be obtained for it.