Gamma-ray Burst 040730

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Fri 30 Jul 04 02:12:40 UT
  NOTICE_TYPE:    INTEGRAL Wakeup
  TRIGGER_NUM:    1888,   Sub_Num: 0
  GRB_RA:         238.2856d {+15h 53m 09s} (J2000),
                  238.3769d {+15h 53m 30s} (current),
                  237.2908d {+15h 49m 10s} (1950)
  GRB_DEC:        -56.4492d {-56d 26' 56"} (J2000),
                  -56.4626d {-56d 27' 44"} (current),
                  -56.3008d {-56d 18' 02"} (1950)
  GRB_ERROR:      3.07 [arcmin, radius, statistical only]
  GRB_INTEN:      9.74 [sigma]
  GRB_TIME:       7942.70 SOD {02:12:22.70} UT
  GRB_DATE:       13216 TJD;   212 DOY;   04/07/30
  SC_RA:          229.00 [deg] (J2000)
  SC_DEC:         -59.19 [deg] (J2000)
  SUN_POSTN:      129.67d {+08h 38m 40s}  +18.45d {+18d 27' 18"}
  SUN_DIST:       115.59 [deg]
  MOON_POSTN:     285.64d {+19h 02m 34s}  -27.32d {-27d 19' 26"}
  MOON_DIST:       44.30 [deg]
  GAL_COORDS:     326.13, -1.99 [deg] galactic lon,lat of the burst
  ECL_COORDS:     249.15,-35.28 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  

• GCN/BACODINE POSITION NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Fri 30 Jul 04 03:57:51 UT 
  NOTICE_TYPE:    INTEGRAL Offline
  TRIGGER_NUM:    1888,   Sub_Num: 1
  GRB_RA:         238.3153d {+15h 53m 16s} (J2000),
                  238.4067d {+15h 53m 38s} (current), 
                  237.3205d {+15h 49m 17s} (1950)
  GRB_DEC:        -56.4507d {-56d 27' 02"} (J2000),
                  -56.4641d {-56d 27' 50"} (current),
                  -56.3024d {-56d 18' 08"} (1950)
  GRB_ERROR:      2.00 [arcmin, radius, statistical only]
  GRB_INTEN:      9.74 [sigma]   
  GRB_TIME:       7942.70 SOD {02:12:22.70} UT
  GRB_DATE:       13216 TJD;   212 DOY;   04/07/30
  SC_RA:          229.00 [deg] (J2000)
  SC_DEC:         -59.19 [deg] (J2000)  
  SUN_POSTN:      129.67d {+08h 38m 40s}  +18.45d {+18d 27' 18"}
  SUN_DIST:       115.61 [deg]  
  MOON_POSTN:     285.64d {+19h 02m 34s}  -27.32d {-27d 19' 26"}
  MOON_DIST:       44.29 [deg]
  GAL_COORDS:     326.14, -2.01 [deg] galactic lon,lat of the burst
  ECL_COORDS:     249.17,-35.28 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.
  

• red DSS finding chart ps-file
  
  
• GCN notice #2634
  D. Gotz, S. Mereghetti (IASF, Milano), N. Mowlavi, M. Beck, J.Borkowski (ISDC) on behalf of the IBAS Localization Team report:
  A 50 s long GRB has been detected with the INTEGRAL Burst Alert System (IBAS) on July 30 at 02:11:55 UT. The GRB has been detected with IBIS/ISGRI in the 15-200 keV band (IBAS Alert # 1888) Its coordinates (J2000) are:

  R.A.  15h 53m 16s
  Dec. -56deg 27' 03''
  

  with an uncertainty of 2 arcmin (90% c.l. radius)
  The preliminary peak flux in the 20-200 keV range is about 0.4 photons/cmsq/s (4E-8 erg/cmsq/s) (1 s integration time).
  This message can be cited.
• GCN notice #2635
  J. Gorosabel (IAA-CSIC), S. Eguchi (Univ. of Nagoya), A.J. Castro-Tirado (IAA-CSIC), A. de Ugarte Postigo (IAA-CSIC), P. Kilmartin (Univ. of Canterbury), P. Yock (Univ. of Auckland), M. Jel=EDnek (IAA-CSIC) and J.M. Castro Cer=F3n (STScI) report:
  "We have acquired two set of images of the GRB 040730 error box, provided by INTEGRAL (Gotz et al. GCN 2634), with the 0.6 m telescope (+MOA camera) at the Mt. John Observatory. The observations were performed with the MOA broad R band filter (similar to Ic); individual exposure times were 300 s. The two sets are composed of three images each (Texp =3D 3 x 300 s), the first one taken on July 30.2992-30.3126 UT (t-to ~ 5.2 hr) and the second one 30.5215-30.5349 UT (t-to ~ 10.7 hr). Visual comparison of the two epochs did not reveal variable sources brighter than Ic ~ 20. We note=20 the severe Galactic extinction in the GRB line of sight (A_I ~ 2.3 mag)."
  This message may be cited.
• GCN notice #2636
  D. Bersier, J. Rhoads, A. Fruchter (STScI), A. Levan (U. of Leicester), M. Albrecht (Bochum) and B. Reipurth (Hawaii) report on behalf of a larger collaboration:
  We have observed the field of GRB 040730 (Gotz et al., GCN 2634) with the Infrared Side Port Imager (ISPI) on the CTIO Blanco-4m telescope, starting 0.11d after the burst. We obtained several images on Jul 30 and Jul 31 UT in the J, H, and Ks bands. The 10' field of view was centered on the GRB position and covering the whole error box (2').
  We used an image subtraction technique to search for any variable object in the Ks-band data. In this passband the foreground extinction is approximately 0.4 magnitude. We find no variable object in our first night data. Similarly, the comparison of the first and second night data reveal no transient, to a limiting magnitude of approximately Ks=17.6 (5 sigma).