Gamma-ray Burst 041219C

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN notice #2886
  C. Markwardt (UMD), L. Barbier, S. Barthelmy (GSFC), P. Boyd (UMBC), S. Campana (OAB), J. Cummings (GSFC), E. Fenimore (LANL), M. Galassi (LANL), N. Gehrels (GSFC), M. Goad (U.Leicester), D. Hullinger (UMD), H. Krimm (USRA), K. McLean (LANL), J. Norris (GSFC), D. Palmer (LANL), A. Parsons (GSFC), G. Sato (ISAS), M. Suzuki (Saitama), T. Takahashi (ISAS), J. Tueller (GSFC) on behalf of the Swift BAT team.
  At 20:30:33 UT, the Swift Burst Alert Telescope (BAT) triggered and located on-board GRB041219c (BAT Trigger #100380). This is the third burst detected and imaged by BAT on Dec 19. The spacecraft did not autonomously slew to the burst since automated slewing is not yet enabled. Automated notification through TDRSS is also disabled during this early commissioning phase of the mission.
  The ground-calculated location is RA, Decl. 343.966, -76.802 (J2000) with an uncertainty of 12 arcmin (radius, including a large systematic uncertainty due to the lack of an on-orbit bore-sight alignment calibration). This is ~43 degrees off the BAT bore sight and is ~50% encoded. It was imaged at >19 sigma. The source is 39 degrees from the galactic plane.
  The burst contained at least two peaks, each peak with a full-width, half-maximum of ~7 seconds, for a total duration of ~40 seconds. There is a possible faint precursor 40 seconds earlier which may or may not be from GRB 041219c (it cannot be determined with the data at hand). The peak flux was 1.5 events/cm^2/sec in the 15-350 keV band (~6 Crab).
  The spectrum appears to be soft based on the light curve. The total fluence is approximately 21 events/cm^2 (15-350 keV), or 2E-6 erg/cm^2.
• RXTE/ASM detection
  

  TITLE:                    GCN/RXTE_ASM BURST POSITION NOTICE  
  NOTICE_DATE:              Tue 21 Dec 04 23:06:13 UT
  NOTICE_TYPE:              RXTE-ASM Initial
  TRIGGER_NUM:              No correlation with BATSE is possible.  
  GRB_DATE:                 13358 TJD;   354 DOY;   04/12/19
  GRB_TIME:                 73791.64 SOD {20:29:51.64} UT
  POSITION_TYPE:            Box
  GRB_RXTE_RA:              342.367d {+22h 49m 28s} (J2000),
                            342.466d {+22h 49m 52s} (current),
                            341.358d {+22h 45m 26s} (1950)
  GRB_RXTE_DEC:             -76.648d {-76d 38' 52"} (J2000),
                            -76.622d {-76d 37' 17"} (current),  
                            -76.913d {-76d 54' 44"} (1950)
  GRB_ERROR_RA1:            343.100d {+22h 52m 24s} (J2000)
  GRB_ERROR_DEC1:           -76.790d {-76d 47' 23"} (J2000)
  GRB_ERROR_RA2:            342.620d {+22h 50m 29s} (J2000)
  GRB_ERROR_DEC2:           -76.750d {-76d 45' 00"} (J2000)
  GRB_ERROR_RA3:            341.560d {+22h 46m 14s} (J2000)
  GRB_ERROR_DEC3:           -76.480d {-76d 28' 47"} (J2000)
  GRB_ERROR_RA4:            342.050d {+22h 48m 12s} (J2000)
  GRB_ERROR_DEC4:           -76.530d {-76d 31' 47"} (J2000)
  GRB_RXTE_ERROR:           0.250 [deg radius (stat+sys), 90%]
  GRB_RXTE_INTEN:           2900.00 [mCrab] 
  SUN_POSTN:                268.14d {+17h 52m 34s}  -23.43d {-23d 25' 37"}
  SUN_DIST:                  63.63 [deg] 
  MOON_POSTN:                12.05d {+00h 48m 11s}   +3.34d {+03d 20' 40"}
  MOON_DIST:                 81.71 [deg]
  COMMENTS:                 RXTE-ASM GRB Coordinates.
  COMMENTS:                 
  COMMENTS:                 This is GRB041219C (GCN 2886).  ASM error box lies
  COMMENTS:                 near W edge of Swift error circle.
  COMMENTS:                 First ASM maximum confirms Swift precursor peak, and
  COMMENTS:                 we see the two later     
  COMMENTS:                 peaks in the subsequent camera.dwell.
  

• GCN notice #2900
  

  TITLE:   GCN GRB OBSERVATION REPORT
  NUMBER:  2900
  SUBJECT: GRB 041219c: PROMPT Observations
  DATE:    04/12/23 23:25:48 GMT
  FROM:    Melissa Nysewander at UNC,Chapel Hill  
  

  Melissa Nysewander, Matt Bayliss, Andrew Foster, and Dan Reichart report on behalf of the U. North Carolina team of the FUN GRB Collaboration:
  We imaged an 11.7 arcmin x 11.7 arcmin field near the center of the localization of GRB 041219c (Markwardt et al., GCN 2886) for 70 x 60 sec in V beginning 29.0 hours after the burst with PROMPT Telescope 3 at CTIO.
  Visual comparison to POSS2-Red reveals no obvious transients. Calibration to 10 NOMAD-V stars yields a 3-sigma limiting magnitude of V = 20.4 at a mean time of 30.0 hours after the burst for this region. Our image can be found at: http://www.physics.unc.edu/~mnysewan/grb041219c.html
  Construction and commissioning of PROMPT Telescope 3 began only three days prior to this burst. Despite this, the observations were conducted completely remotely from La Serena.