Gamma-ray Burst 021219

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN notice #1731
  S. Mereghetti, D. Gotz, J. Burkowsky, the INTEGRAL Science Data Center and the INTEGRAL Science Working team report the detection of GRB021219 at 07:33:57 UTC in the field of view of the IBIS telescope on board ESA's INTEGRAL satellite. The burst lasted about 4 seconds and had a peak flux of about 1-2 10^-7 erg/cm2/s in the 25-100 keV range. The preliminary position is RA 18h50m and DEC +31deg 52s with an uncertainty of 20' (radius) dominated by systematics. A refined position will be reported as soon as available. This message is citable.
• GCN notice #1768
  D.Gotz (IASF-Milano), P.Favre (ISDC), S.Mereghetti (IASF-Milano) and J.Borkowski (ISDC) and the INTEGRAL Science Working team report :
  Further analysis of the INTEGRAL IBIS data led to a refined position of GRB021219 of RA 18h 50.5m DEC 31deg 54m (J2000) with an uncertainty of 4 arcmin.
• GCN notice #1769
  Due to a typing mistake the GRB declination in GCN 1766 was reported as +31deg 52s. The correct value is +31deg 52min There was also a spelling error in the name of J.Borkowski
• GCN notice #1770
  V. Lipunov, A. Krylov, V. Kornilov, G. Borisov, D. Kuvshinov, M. Kuznetcov S. Patanin - Sternberg Astronomical Institute, Moscow report:
  We observed with MASTER-system ( http://observ.inetcomm.ru/) error box of the burst GRB 021219 (GCN INTEGRAL Circ 1766) at 15:04:07 UT (after 7,5 hours GRB time) between cloudes. There is no OT brighter than 13.7 (With respect to R-USNO stars). The corected eror box (GCN Circ 1769) was in our field.
  The Images can be seen at URL:
  http://observ.inetcomm.ru/images/19122002/
  Circular may be cited.
• GCN notice #1771
  K. Hurley and T. Cline, on behalf of the Ulysses GRB team, and
  D.Gotz (IASF-Milano), P.Favre (ISDC), S.Mereghetti (IASF-Milano), J.Borkowski (ISDC), and the INTEGRAL Science Working team, report:
  This burst (GCN 1766, 1767, 1768) was also observed by Ulysses.
  Although the INTEGRAL timing is still undergoing refinement, we have triangulated it assuming a systematic uncertainty of 100 ms, which is supported by recent SGR observations. The preliminary annulus is centered at RA, Decl(2000)= 182.935, 36.337 degrees, with radius 78.549 +/- 0.023 degrees (3 sigma ). This annulus intersects the INTEGRAL error circle given in GCN 1768 at two points:

            RA                               DEC
       282.557459=18 H 50 M 13.79 S      31.832096= 31 o 49' 55"
       282.642596=18 H 50 M 34.22 S      31.932013= 31 o 55' 55"
  

  This reduces the error box size to about 15 square arcminutes. This annulus may be improved. A map has been posted at ssl.berkeley.edu/ipn3/021219.
• GCN notice #1772
  K. Hurley and T. Cline, on behalf of the Ulysses GRB team, and
  D.Gotz (IASF-Milano), P.Favre (ISDC), S. Mereghetti (IASF-Milano), J. Borkowski (ISDC), and the INTEGRAL Science Working team, report:
  The IPN annulus actually intersects the INTEGRAL error circle given in GCN 1768 at four points, not two:

            RA                               DEC
       282.572616=18 h 50 m 17 s      31.849899= 31 o  50 '  59 "
       282.664692=18 h 50 m 39 s      31.957916= 31 o  57 '  28 "
       282.546093=18 h 50 m 11 s      31.898856= 31 o  53 '  55 "
       282.601577=18 h 50 m 24 s      31.963983= 31 o  57 '  50 "
  

  Thus the agreement between the annulus and the error circle is improved, but the error box size increases to about 22 square arcminutes. A revised map has been posted at ssl.berkeley.edu/ipn3/021219.
• GCN notice #1773
  A. Henden (USRA/USNO), J. Hambsch (VVS/AAVSO), E. Broens (VVS/AAVSO) report:
  We have imaged the entire error circle of GRB021219 (Mereghetti et al., GCN 1766; Gotz et al., GCN 1768) with the following results:

       UTD     dt(burst) tele   exp   filt  condx  lim_mag
     021219.78  11hr     0.4m  8x5min  Rc   poor   18.0
     021220.06  18hr     1.0m  12min   Ic   poor   19.5
  

  Comparison with the DSS-2 F and N plates show only a few objects near the plate limit that may or may not be real, but no new bright object. No galaxies are seen; at galactic longitude 61.8 and latitude +14, this field is relatively close to the galactic plane. No additional observations are planned.
• GCN notice #1774
  E. Berger (Caltech) and D. A. Frail (NRAO) report on behalf of a larger collaboration:
  "On December 20.03 UT we used the VLA at 4.86 GHz to observe the error box of GRB 021219 (GCN 1766). We detect a single radio source within the refined IPN+INTEGRAL error region (GCN 1772), which is visible in the NRAO VLA Sky Survey (NVSS; Condon et al. 1998, AJ, 115, 1693). There are no additional sources down to a 4-sigma limit of 220 microJy."
  This message may be cited.
• GCN notice #1775
  A. J. Castro-Tirado, J. Gorosabel and P. Amado (IAA-CSIC, Granada) J. M. Castro Cer=F3n (ROA, San Fernando)
  report:
  "On Dec 20.74 UT we observed the field of the GRB 021219 detected by INTEGRAL (Mereghetti et al. GCN 1766) with the 1.5-m Telescope at the Observatorio de Sierra Nevada in Granada, in order to monitor the entire IBIS-IPN error box (Hurley et al. GCN 1771, Gotz et al. GCN 1772). In the co- added image (6 x 300-s in the Johnson R-band filter with a 2".5 seeing), no optical transient is found when comparing to the DSS-2 (R-band) down to R =3D 20.5".
  This message is citeable.