Gamma-ray Burst 080414

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Mon 14 Apr 08 22:35:52 UT
  NOTICE_TYPE:    INTEGRAL Wakeup
  TRIGGER_NUM:    5258,   Sub_Num: 0
  GRB_RA:         272.1237d {+18h 08m 30s} (J2000),
                  272.2456d {+18h 08m 59s} (current),
                  271.3880d {+18h 05m 33s} (1950)
  GRB_DEC:        -18.8745d {-18d 52' 27"} (J2000),
                  -18.8727d {-18d 52' 21"} (current),
                  -18.8830d {-18d 52' 58"} (1950)
  GRB_ERROR:      3.25 [arcmin, radius, statistical only]
  GRB_INTEN:      8.30 [sigma]
  GRB_TIME:       81215.28 SOD {22:33:35.28} UT
  GRB_DATE:       14570 TJD;   105 DOY;   08/04/14
  SC_RA:          276.35 [deg] (J2000)
  SC_DEC:          -8.10 [deg] (J2000)
  SUN_POSTN:       23.49d {+01h 33m 56s}   +9.80d {+09d 48' 06"}
  SUN_DIST:       113.13 [deg]   Sun_angle= 7.4 [hr] (West of Sun)
  MOON_POSTN:     144.62d {+09h 38m 29s}  +14.50d {+14d 30' 18"}
  MOON_DIST:      129.81 [deg]
  GAL_COORDS:      11.32,  0.54 [deg] galactic lon,lat of the burst
  ECL_COORDS:     272.02,  4.55 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       Possibly real GRB event  
  

• red DSS finding chart ps-file
  
  
• GCN Circular #7618
  S.Mereghetti, A.Paizis (IASF-Milano), D.Gotz (CEA-Saclay), M. Turler, S.Shaw, M. Beck, C. Baldovin Saavedra (ISDC, Versoix), and J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report:
  A GRB lasting about 10 s has been detected by IBAS in IBIS/ISGRI data at 22:33:32 UT of April 14. The coordinates (J2000) are:

   RA:  272.1342 [degrees]
   DEC: -18.8291 [degrees]
  

  with an uncertainty of 2 arcmin (90% c.l.).
  A preliminary analysis gives a peak flux in the 20-200 keV range of about 1 ph/cmq/s (1-s integration time) and a fluence over the same energy range of 3e-7 erg/cmq.
  This message can be cited.
• GCN NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Tue 15 Apr 08 00:25:21 UT
  NOTICE_TYPE:    INTEGRAL Offline
  TRIGGER_NUM:    5258,   Sub_Num: 1
  GRB_RA:         272.1341d {+18h 08m 32s} (J2000),
                  272.2560d {+18h 09m 01s} (current),
                  271.3987d {+18h 05m 36s} (1950)
  GRB_DEC:        -18.8291d {-18d 49' 44"} (J2000),
                  -18.8273d {-18d 49' 37"} (current),
                  -18.8376d {-18d 50' 15"} (1950)
  GRB_ERROR:      3.00 [arcmin, radius, statistical only]
  GRB_INTEN:      8.30 [sigma]
  GRB_TIME:       81215.28 SOD {22:33:35.28} UT
  GRB_DATE:       14570 TJD;   105 DOY;   08/04/14
  SC_RA:          276.35 [deg] (J2000)
  SC_DEC:          -8.10 [deg] (J2000)
  SUN_POSTN:       23.56d {+01h 34m 13s}   +9.83d {+09d 49' 44"}
  SUN_DIST:       113.19 [deg]   Sun_angle= 7.4 [hr] (West of Sun)
  MOON_POSTN:     145.55d {+09h 42m 12s}  +14.10d {+14d 05' 48"}
  MOON_DIST:      128.85 [deg]
  GAL_COORDS:      11.37,  0.55 [deg] galactic lon,lat of the burst
  ECL_COORDS:     272.03,  4.60 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       refined_coordinates_after_offline_analysis  
  

• GCN Circular #7619
  P. Kubanek (IAA-CSIC Granada, GACE Valencia) and J. French (UCD Dublin) reports on behalf of the Watcher collaboration:
  Watcher started observations of long INTEGRAL GRB at 22:36:25, e.g. 2:50 post GRB, 33 sec post GCN trigger. Observation, as well as futher analysis, is ongoing. Quick look on first images does not show any new source down to 14 mag.
  This message may be cited.
• GCN Circular #7620
  R. Burenin, (IKI), I. Khamitov (TUG), M. Pavlinsky, R. Sunyaev (IKI), Z. Eker (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.), I. Bikmaev, N. Sakhibullin (KSU/AST)
  report:
  The field of the long GRB 080414 detected by INTEGRAL (Mereghetti et al., GCN 7618) was observed with Russian-Turkish 1.5-m telescope (RTT150, Bakirlitepe, TUBITAK National Observatory, Turkey), under not optimal conditions. We made 8x100s images in R band centered at 23:46 UT, i.e. approximately 1.21 hours after the burst. We detect no new objects as compared to DSS-II red plate with magnitude brighter than R=~20.
• GCN Circular #7628
  M. De Pasquale (MSSL/UCL), A.P. Beardmore (U. Leicester) and M. Stamatikos (GSFC) report on the behalf of the Swift team:
  At 2008-04-15 14:15UT Swift performed a TOO observation of the INTEGRAL burst GRB 080414 (Mereghetti et al., GCN Circ. 7618), some 56.6ks after the trigger.
  No X-ray source was found in or near the IBAS error circle in a 3.9ks exposure Swift/XRT Photon Counting mode image (taken from T+56ks to T+85.5ks after the trigger) down to a 3 sigma limiting 0.3-10keV count rate of 3e-3 count/s. Assuming a power-law spectrum of photon index 2 absorbed by the Galactic column density of 1.16e22 cm^-2 in the direction of the burst, this corresponds to an observed 0.3-10keV flux limit of 1.9e-13 erg cm^-2 s^-1.
  The Swift/UVOT also observed the field. We do not detect an UV/Optical afterglow in the IBAS error circle in all UVOT filters down to the following 5 sigma upper limits:

     Filter  T_start  T_stop  Exp.    Mag UL (5sig)
             (ks)     (ks)    (s)
  
     v       56.9     79.9    272     > 18.3
     b       56.7     79.5    272     > 19.4
     u       56.7     84.7    326     > 19.2
     uvw1    56.6     84.7   1001     > 19.9
     uvm2    57.0     80.1    564     > 19.4
     uvw2    56.8     79.8   1085     > 19.9
  

  These upper limits are not corrected for the very large Galactic extinction in the line of sight to GRB 080414, corresponding to a reddening of E(B-V)=6.95 mag (Schlegel et al., 1998, ApJS, 500, 525). We note that this value is rather uncertain in this direction. The photometry is based on the UVOT photometric system described in Poole et al. (2008, MNRAS, 383, 627).
• GCN Report 125.1
  GCN_Report 125.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_125_1.pdf by M. Stamatikos at GSFC/ORAU titled: "Final Swift Observations of INTEGRAL GRB 080414"
• GCN Report 125.2
  GCN_Report 125.2 has been posted: http://gcn.gsfc.nasa.gov/reports/report_125_2.pdf by M. Stamatikos at GSFC/ORAU titled: "Corrected Final Swift Observations of INTEGRAL GRB 080414"