Gamma-ray Burst 060516

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 16 May 06 06:44:52 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     210254,   Seg_Num: 0
GRB_RA:           71.178d {+04h 44m 43s} (J2000),
                  71.248d {+04h 44m 60s} (current),
                  70.623d {+04h 42m 30s} (1950)
GRB_DEC:         -18.113d {-18d 06' 47"} (J2000),
                 -18.102d {-18d 06' 05"} (current),
                 -18.204d {-18d 12' 14"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=2205 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        13871 TJD;   136 DOY;   06/05/16
GRB_TIME:        24214.80 SOD {06:43:34.80} UT
GRB_PHI:         -150.73 [deg]
GRB_THETA:        29.58 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    9.43 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +0 -100  +0 -75  +1 
SUN_POSTN:        52.93d {+03h 31m 44s}  +19.08d {+19d 04' 54"}
SUN_DIST:         41.31 [deg]   Sun_angle= -1.2 [hr] (East of Sun)
MOON_POSTN:      272.44d {+18h 09m 46s}  -28.55d {-28d 33' 01"}
MOON_DIST:       129.05 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      216.40,-35.88 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       66.39,-40.02 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 78.69,9.87 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 16 May 06 06:47:39 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     210254,   Seg_Num: 0
GRB_RA:           71.178d {+04h 44m 43s} (J2000),
                  71.248d {+04h 44m 60s} (current),
                  70.623d {+04h 42m 30s} (1950)
GRB_DEC:         -18.113d {-18d 06' 47"} (J2000),
                 -18.102d {-18d 06' 05"} (current),
                 -18.204d {-18d 12' 14"} (1950)
GRB_DATE:        13871 TJD;   136 DOY;   06/05/16
GRB_TIME:        24214.80 SOD {06:43:34.80} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -150.73 [deg]
GRB_THETA:        29.58 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    9.43 [sigma]
LC_URL:          sw00210254000msb.lc
SUN_POSTN:        52.93d {+03h 31m 44s}  +19.08d {+19d 04' 56"}
SUN_DIST:         41.31 [deg]   Sun_angle= -1.2 [hr] (East of Sun)
MOON_POSTN:      272.47d {+18h 09m 53s}  -28.55d {-28d 33' 00"}
MOON_DIST:       129.04 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      216.40,-35.88 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       66.39,-40.02 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is an image trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 78.69,9.87 [deg].

GCN Circular #5144
A. M. Parsons (GSFC), L. M. Barbier (NASA/GSFC), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/ORAU), C. B. Markwardt (GSFC/UMD) and D. M. Palmer (LANL) report on behalf of the Swift Team:
At 06:43:34 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060516 (trigger=210254). Swift did not slew because of the Sun observing constraint. The BAT on-board calculated location is RA,Dec 71.178, -18.113 {04h 44m 43s, -18d 06' 47"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is typical for image triggers, the BAT TDRSS lightcurve shows nothing above background noise. We will have to wait for the full data downlink (T+2 hrs) to tell more about this burst.
GCN Circular #5146
D. Hullinger (BYU-Idaho), L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), M. Koss (GSFC/UMD), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/JSPS/USRA), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC) on behalf of the Swift-BAT team:
Using the data set from T-119 to T+183 sec from recent telemetry downlinks, we report further analysis of BAT GRB 060516 (trigger #210254) (Parsons, et al., GCN 5144). The BAT ground-calculated position is RA,Dec = 71.167,-18.096 deg {04h 44m 40.8s,-18d 05' 44"} (J2000) +- 3.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 79%. The ground-calculated image significance in the 15-100 keV band is 12.3 sigma.
The mask-weighted lighcurve shows a long relatively smooth burst starting at ~T-30 sec and extending out to T+130, mostly in the 15-50 keV band. There is no significant emission in the >100 keV band. T90 (15-350 keV) is 160 +- 20 sec (estimated error including systematics). The long duration and smooth nature of the lightcurve could be an indication of a high redshift burst.
The time-averaged spectrum from T-42.2 to T+134.0 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.15 +- 0.24. The fluence in the 15-150 keV band is 1.1 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+128.56 sec in the 15-150 keV band is 0.3 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
Due to the Sun constraint, this GRB will not be observable by the Swift XRT and UVOT instruments for >31 days.

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Jochen Greiner, last update: 16-May-2006 [Disclaimer]