we imaged for 10 ks the field of GRB 120624B (Gruber et al. 2012, GCN 13377) with the Chandra ACIS-S starting on June 30, 2012 8:56:22 UT. Within the Swift/BAT 1 arcmin error circle (Barthelmy et al. 2012, GCN 13381) we detect two sources, already reported by Swift/XRT (Littlejohns et al. 2012, GCN 13394). S1 source is detected with wavdetect at a (preliminary) position: RA(J2000): 11 23 32...Full Text

Following the XRT observations of the BAT error circle for GRB 120624B reported in Littlejohns et al. (GCN 13394), we have compared the measured XRT flux of source S1 at 240 ks to that of bursts with similar or greater measured BAT fluence. Measurements of the XRT flux at approximately 240 ks for these bursts show that GRB 120624B lies at the faint end of the distribution of such bursts, should...Full Text

The Swift/UVOT began settled observations of the field of GRB 120624B 60hours 45mins after the BAT trigger (Barthelmy et al., GCN 13381). No optical afterglow is found at either of the XRT positions (Littlejohns et al. GCN 13394) nor the HAWKI position reported by D'Avanzo et al. (GCN 13391) in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld...Full Text

We have analysed 10 ks of XRT data for GRB 120624B (Barthelmy et al. GCN 13381), from 218.7 ks to 260.9 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. Inside the BAT refined error circle (Sakamoto et al. GCN 13384) we find an uncatalogued X-ray source (S1) at RA, Dec = 170.8845, +8.9283 which is equivalent to: RA (J2000): 11 23 32.28 Dec(J2000): +08 55 42.0 with...Full Text

We observed the field of the bright GRB 120624B (Fermi/GBM trigger 362269436/120624933, Gruber et al., GCN 13377, 13383; Konus-Wind detection, Golenetskii et al., GCN 13382; Swift trigger 525068, Sakamoto et al., GCN 13384) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPG/ESO telescope at La Silla Observatory (Chile). Observations...Full Text

We observed the field of the very intense GRB 120426B detected by Fermi, Swift and Konus-Wind (Gruber et al., GCN 13377, Barthelmy et al. GCN 13381, Golenetskii et al. GCN 13382) with HAWKI at ESO's VLT (Paranal, Chile). Observations consisted of two epochs of 600s of integration in K-band covering the entire BAT error box (Sakamoto et al. GCN 13384). In the first epoch obtained 24.7 hr after...Full Text

GRB 120624B, detected by Fermi-GBM (GCN 13377), Fermi-LAT (GCN 13379), Swift-BAT (GCN 13381), and Konus-Wind (GCN 13382) has very high fluence (1.9e-04 erg cm-2) and peak flux. The fluence of GRB 120624B in among the top 1.5% of bursts detected by Swift-BAT and the top 0.55% detected by Fermi-GBM. The GRB position is unfortunately within the Swift Moon constraint. Swift-XRT/-UVOT follow-up...Full Text

We observed the Swift/BAT field of GRB 120624B (Gruber et al., GCN 13377; Vianello& Kocevski, GCN 13379; Sakamoto et al., GCN 13384) using the 2.5m Nordic Optical Telescope (NOT) equipped with the ALFOSC camera, at La Palma, Canary Islands. Observations started at 21:26 UT on 2012-06-25 (i.e., 23.05 hr after the Fermi trigger) and a series of SDSS r-band frames with a total exposure time of 1250s...Full Text

“Following the detection of GRB 120624B by Fermi/GBM, Fermi/LAT, Konus/Wind and Swift/BAT (GCN 13377, 13378, 13379 and 13381 respectively), we have imaged the field with the 0.36m f/7 telescope at Gualba Observatory in Barcelona (Spain) starting on June 25 at 20:30 UT (i.e. about 22 hr post-burst). Within the Swift/BAT 3’ radius error box no optical afterglow candidate is identified for GRB 120624B...Full Text

RA(J2000) = 11h 23m 32.6s Dec(J2000) = +08d 56' 00.4" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 86%. The mask-weighted light curve shows multiple overlapping episodes starting from T-25 sec. There are two main episodes going from T-10 to T+70 sec with a peak around T+35 sec, and the second episode starts T+120 sec and appears to end...Full Text

"The peak flux and fluence values reported for GRB 120624B in GCN 13380 were erroneously calculated. The correct numbers are as follows: The fluence in the 10-1000 keV energy range is (1.916 +/- 0.002)E-04 erg/cm^2. This is consistent with the values reported by Konus-Wind (Golenetskii et al. GCN 13382). The 1-sec peak photon flux measured in the 10-1000 keV band is 17.7 +/- 0.3 ph/s/cm^2. We...Full Text

The long intense hard GRB 120624B (GBM trigger 362269436: Gruber et al., GCN 13377; Fermi/LAT detection: Vianello & Kocevski, GCN 13379) triggered Konus-Wind at T0=80406.904s UT (22:20:06.904) The light curve shows multiple pulses grouped to three main episodes. A total duration of the burst is ~300 s. We note a quasi-periodic light curve structure (with T~3.6s) which is observed during the second...Full Text

At 22:19:51 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120624B (trigger=525068) (also detected by Fermi-GBM, Circ 13377 and Fermi-LAT, Circ 13379). There were no real-time notices for this event because it occurred during a TDRSS outage (22:07 to 22:46), so none of the normal sequence of real-time notices were available. There was no automated slew to this BAT trigger because...Full Text

Fermi-LAT has detected high energy emission from the long, hard and bright GRB 120624B in ground analysis. The GRB was triggered on by the GBM on June 24, 2012 at 22:23:54.93 UTC, although the emission started ~250 seconds earlier (trigger 362269436, GCN 13377). The best GBM position was ~70 deg off-axis for the whole duration of the prompt emission (~270 seconds), outside of the Fermi/LAT nominal field...Full Text

"At 22:23:54.92 UT on 24 June 2012, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 120624B (trigger 362269436 / 120624933). The on-ground calculated location, using the GBM trigger data, is RA = 172.9, DEC = 6.5 (J2000 degrees, equivalent to 11 h 31 m 36 s, 06 d 30 '), with an uncertainty of 1 degree (radius, 1-sigma containment, statistical only; there is additionally a systematic error...Full Text