Gamma-ray Burst 030501

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Thu 01 May 03 03:10:34 UT
  NOTICE_TYPE:    INTEGRAL Wakeup
  TRIGGER_NUM:    596,   Sub_Num: 0
  GRB_RA:         286.3819d {+19h 05m 32s} (J2000),
                  286.4226d {+19h 05m 41s} (current),
                  285.7710d {+19h 03m 05s} (1950)
  GRB_DEC:         +6.3410d {+06d 20' 27"} (J2000),
                   +6.3462d {+06d 20' 46"} (current),
                   +6.2639d {+06d 15' 50"} (1950)
  GRB_ERROR:      4.35 [arcmin, radius, statistical only]
  GRB_INTEN:      10.02 [sigma]
  GRB_TIME:       11418.49 SOD {03:10:18.49} UT
  GRB_DATE:       12760 TJD;   121 DOY;   03/05/01
  SC_RA:          284.62 [deg] (J2000)
  SC_DEC:          -6.82 [deg] (J2000)
  SUN_POSTN:       37.94d {+02h 31m 45s}  +14.93d {+14d 55' 32"}
  SUN_DIST:       108.89 [deg]
  MOON_POSTN:      34.55d {+02h 18m 12s}  +11.63d {+11d 37' 60"}
  MOON_DIST:      106.29 [deg]
  GAL_COORDS:      40.18, -0.23 [deg] galactic lon,lat of the burst
  ECL_COORDS:     288.64, 28.73 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.
  

• GCN notice #2183
  S. Mereghetti, D. Gotz, J. Borkowski on behalf of the IBAS Localization Team, S. Shaw and T. Courvoisier on behalf the INTEGRAL Science Data Centre and the INTEGRAL Science Working Team
  report the detection of a GRB at 03:10:18 UTC at coordinates RA 19h 05m 30s DEC +06deg 18' 26'' (J2000) with an uncertainty of 3 arcmin radius.
  The burst lasted about 40 seconds.
• GCN/BACODINE POSITION NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Thu 01 May 03 07:40:04 UT
  NOTICE_TYPE:    INTEGRAL Offline
  TRIGGER_NUM:    596,   Sub_Num: 1
  GRB_RA:         286.3768d {+19h 05m 30s} (J2000),
                  286.4175d {+19h 05m 40s} (current),
                  285.7657d {+19h 03m 04s} (1950)
  GRB_DEC:         +6.3072d {+06d 18' 26"} (J2000),
                   +6.3124d {+06d 18' 45"} (current),
                   +6.2301d {+06d 13' 48"} (1950)
  GRB_ERROR:      3.00 [arcmin, radius, statistical only]
  GRB_INTEN:      12.90 [sigma]
  GRB_TIME:       11418.49 SOD {03:10:18.49} UT
  GRB_DATE:       12760 TJD;   121 DOY;   03/05/01
  SC_RA:          284.62 [deg] (J2000)
  SC_DEC:          -6.82 [deg] (J2000)
  SUN_POSTN:       37.94d {+02h 31m 45s}  +14.93d {+14d 55' 32"}
  SUN_DIST:       108.91 [deg]
  MOON_POSTN:      34.55d {+02h 18m 12s}  +11.63d {+11d 37' 60"}
  MOON_DIST:      106.31 [deg]
  GAL_COORDS:      40.15, -0.24 [deg] galactic lon,lat of the burst
  ECL_COORDS:     288.63, 28.69 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.
  

• GCN notice #2187
  K. Hurley, on behalf of the Ulysses GRB team, and
  A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, report:
  Ulysses and INTEGRAL (SPI-ACS) also observed this burst (GCN 2183). As observed by Ulysses, it had a duration of approximately 75 seconds, a 25-100 keV fluence of approximately 1.1E-06 erg/cm2, and a peak flux of approximately 4.9E-07 erg/cm2 s over 0.25 seconds. Because this event was quite weak, these parameters are uncertain by a factor of about 2.
  We have triangulated it to a preliminary annulus centered at RA, Decl(2000)= 332.536, -37.604 degrees, whose radius is 61.259 +/- 0.294 degrees (3 sigma ). This annulus is consistent with, but does not constrain, the IBIS localization given in GCN 2183.
  This annulus may be improved.
• GCN notice #2188
  Michel Boer and Alain Klotz (CESR/CNRS/UPS), on behalf of the TAROT team report:
  We observed the localisation of GRB 030501 given by INTEGRAL (GCN Circ. 2183). The observations started at 3h10m37.6s, less than 20 seconds after the burst trigger, while it was still active.
  We do detect an object in the INTEGRAL error box which is not present on the DSS. The position of the new source is

  RA = 19h05m37.9s
  DEC = +6d18'51"
  

  with a preliminary uncertainty of 3 arcsec. On our 14, 30s duration, images the flux seems constant in first approximation, at an R magnitude of 14.9 +- 0.2. Hence the new source may be a variable star, detected seremdipitously in high state.
  Work is still in progress on our images to investigate the nature of this object. A preliminary report and finding chart are available at the following URL: http://www.cesr.fr/~klotz/grb030501/ This message is quotable
• GCN notice #2189
  D. Fox (Caltech) reports:
  "The candidate GRB030501 optical afterglow of Boer & Klotz (GCN 2188) is present in archival images of the Second Palomar Optical Sky Survey (XDSS) and the Two-Micron All-Sky Survey (2MASS). Although the object, which appears to be a star, is undetected in the XDSS B-band image, and faint in the XDSS R-band image, it is well-detected in the XDSS I-band image and extremely bright (among the brightest stars in the near field) in 2MASS J, H, and Ks images. These archival images may be viewed at the web page: http://www.astro.caltech.edu/~derekfox/grb030501/tarot.html
  We conclude that the object is not the optical afterglow of GRB030501. We also note in passing that the optical extinction in this field, very near the Galactic disk, is extremely high, E(B-V) = 14.8 mag from the dust maps of Schlegel, Finkbeiner, & Davis (1998). Such highly-reddened objects are thus to be expected."
• GCN notice #2201
  E. O. Ofek, Y.-J. Choi, A. Gal-Yam, Y. Lipkin (Wise observatory, TAU) report:
  We have observed the full error box of GRB030501 (Mereghetti et al. 2003, GCN 2183) using the Wise observatory 1m telescope + SITe CCD camera, starting 2003, May 2nd, 00:05 UT (16.5 hours after the burst). Two 600s R-band frames were obtained.
  Comparison of the images with the POSS-II E plate reveals no new optical sources, to a limiting magnitude of R=20.0, within the INTEGRAL error circle.
• GCN notice #2202
  V.Rumyantsev, E.Pavlenko (CrAO), A.Pozanenko (IKI) report:
  We have imaged the error box of GRB030501 (Mereghetti et al. 2003, GCN 2183) with AT-64 telescope of CrAO. Several unfiltered images were taken on May, 1 21:59-23:12 (18.8 hours after GRB) and May, 3 22:36-23:34 (2.8 days after GRB). Visual comparison with DSS-2I and comparison of the combined images in different epochs (May 1 and May 3) reveals no new or fading objects within GRB error box.
  Log of observations is following:

  Mid time    exposure   limit (3 sigma)
  01.93200    17x120     20.1
  03.96599    21x120     20.0
  

  The combined image of May, 1 can be found in http://grb.rssi.ru/GRB030501/
  This message may be cited.
• GCN notice #2224
  Alain Klotz and Michel Boer (CESR/CNRS/UPS), on behalf of the TAROT team report :
  We co-added 25 unfiltered 30s duration frames, taken between 20s and 17min after GRB 030501 (Mereghetti et al., GCNC 2183). We do not detect any new source up to the limiting magnitude of R=18.0 .
  The source reported in GCN Circ. 2188 is a bright infrared source as indicated by Fox et al (GCNC 2189). It was detected by TAROT because of its residual sensitivity to IR for the unfiltered images.
  The data will be soon available on the TAROT site, and are already accessible through the following URL : http://www.cesr.fr/~klotz/grb030501
  This message is citable.