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Displaying messages 21 to 40 (previous 20 | next 20)

GRB 120624B: Swift detection of a burst
Barthelmy, Kennea, & Racusin
Posted by Scott Barthelmy
12/06/25 15:35:04 GMT

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

GRB 120624A: Fermi GBM observation
Kienlin
Posted by Andreas von Kienlin
12/06/25 14:24:49 GMT

"At 07:24:25.34 UT on 24 June 2012, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 120624A (trigger 362215467 / 120624309). The burst was also detected by the 3rd Interplanetary Network (Golenetskii et al. 2011, GCN 13376). The angle from the Fermi LAT boresight is 90.2 degrees. The GBM light curve consists of a single FRED-like pulse with a duration (T90) of about 0.7 s (50-300...Full Text

GRB 120624B: Fermi-LAT Detection
Vianello & Kocevski
Posted by Giacomo Vianello
12/06/25 10:18:47 GMT

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

Konus-Wind observation of GRB 120624A
?
Posted by Dmitry Frederiks
12/06/25 09:50:57 GMT

The short-duration hard intense GRB 120624A (IPN localization: Golenetskii at al., GCN 13376) triggered Konus-Wind at T0=26662.982s UT (07:24:22.982) The light curve shows a single pulse, a total duration of the burst is ~0.3 s. The emission is seen up to ~10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB120624_T26662/ As observed by Konus-Wind...Full Text

GRB 120624B: Fermi GBM detection
Gruber, Burgess, & Connaughton
Posted by David Gruber
12/06/25 09:39:54 GMT

"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

IPN Triangulation of GRB 120624A (short/intense)
Hurley et al.
Posted by Dmitry Svinkin
12/06/24 23:00:23 GMT

The bright, short-duration GRB 120624A has been observed by Fermi (GBM trigger 362215467), INTEGRAL (SPI-ACS), Konus-Wind, Swift (BAT), and MESSENGER (GRNS), so far, at about 26665 s UT (07:24:25). The burst was outside the coded field of view of the BAT. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000)...Full Text

Swift Trigger 524949: Noise fluctuation near a galaxy
?
Posted by Scott Barthelmy
12/06/23 06:48:53 GMT

At 06:08:23 UT, the Swift Burst Alert Telescope (BAT) triggered and located a possible near-threshold image peak near the location of the nearby galaxies NGC4405 and NGC 4383 (trigger=524949). Swift slewed immediately to the location. The BAT on-board calculated location is RA, Dec 186.424, +16.302, which is RA(J2000) = 12h 25m 42s Dec(J2000) = +16d 18' 09" with an uncertainty of 3 arcmin...Full Text

GRB 120622A: MAXI/GSC detection
Serita et al.
Posted by Motoko Suzuki
12/06/22 05:17:01 GMT

The MAXI/GSC nova alert system triggered at 2012-06-22T03:21:46 UT on an uncatalogued soft X-ray transient source. The transient emission lasted at least for 39 sec within the 65 sec long triangular transit response of MAXI/GSC. We identify this event as GRB 120622A. Assuming that the source flux was constant over the transit, we obtain the source position at (R.A., Dec) = (+205.43 deg, -1.71...Full Text

Swift trigger 524642 / SwJ1910.2-0546
Rumyantsev, Antonyuk, & Pozanenko
Posted by Alexei Pozanenko
12/06/21 14:39:45 GMT

We observed the field of Swift trigger 524642 with AZT-11 telescope of CrAO observatory starting on June 18 (UT) 20:23:03 under favorable weather conditions and seeing of about 2.4 arsces. At the edge of the Swift-XRT localization (+19h 10m 22.39s -05d 47' 55.3" GRB_ERROR=5.2") we found bright optical source which is absent on any DSS2 plates. The coordinates of the source (J2000) 19 10 22.78...Full Text

GRB 120602A: Suzaku WAM observation of the prompt emission
Kobayashi et al.
Posted by Makoto Tashiro
12/06/20 11:48:02 GMT

The long GRB 120602A (IPN; Hurley and Goldsten et al., GCN 13365, Konus-Wind; Golenetskii et al., GCN 13366) triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 05:00:0.83 UT (=T0). The observed light curve shows a multi-peaked structure starting at T0+5.8 s, ending at T0+59.8 s, with a duration (T90) of about 54 seconds. The fluence in...Full Text

Konus-Wind observation of GRB 120617A
?
Posted by Dmitry Frederiks
12/06/19 12:24:29 GMT

The short-duration intense GRB 120617A (IPN localization: Golenetskii at al., GCN 13370) triggered Konus-Wind at T0=54167.025s UT (15:02:47.025) The light curve shows two pulses, a total duration of the burst is ~0.5 s. The emission is seen up to ~4 MeV. A spectral lag between G2(80-300 keV) and G1(20-80 keV) instrument's light curves is estimated to 28 +/- 4 ms (1 sigma). The Konus-Wind light...Full Text

IPN Triangulation of GRB 120617A (short/intense)
Hurley et al.
Posted by Dmitry Svinkin
12/06/18 20:28:42 GMT

The bright, short-duration GRB 120617A has been observed by INTEGRAL (SPI-ACS), Konus-Wind, and MESSENGER (GRNS), so far, at about 54171 s UT (15:02:51). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center...Full Text

Swift Trigger 524642 is Swift J1910.2-0546
?
Posted by Scott Barthelmy
12/06/18 19:52:20 GMT

At 19:06:47 UT, the Swift Burst Alert Telescope (BAT) triggered on Swift J1910.2-0546 (trigger=524642). Swift will execute a delayed slewed due to the Earth observing constraint (49 min delay). The BAT on-board calculated location is RA, Dec 287.577, -5.806, which is RA(J2000) = 19h 10m 18s Dec(J2000) = -05d 48' 22" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic...Full Text

Trigger 524584: Swift detection of Algol
?
Posted by Scott Barthelmy
12/06/18 12:00:18 GMT

At 11:33:11 UT, the Swift Burst Alert Telescope (BAT) triggered on the flare star Algol (trigger=524584). Swift did not slew because of the Sun observing constraint. The BAT on-board calculated location is RA, Dec 47.017, +40.966, which is RA(J2000) = 03h 08m 04s Dec(J2000) = +40d 57' 57" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As...Full Text

Swift triggers (#524542) on a Galactic source
?
Posted by Scott Barthelmy
12/06/17 16:12:08 GMT

At 15:46:55 UT, the Swift Burst Alert Telescope (BAT) triggered and located a likely Galactic source (trigger=524542). Swift slewed immediately to the source. The BAT on-board calculated location is RA, Dec 282.785, +0.025 which is RA(J2000) = 18h 51m 08s Dec(J2000) = +00d 01' 29" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is typical...Full Text

Konus-Wind observation of GRB 120602A
?
Posted by Dmitry Frederiks
12/06/15 09:28:27 GMT

The long intense GRB 120602A (IPN localization: Hurley at al., GCN 13365) triggered Konus-Wind at T0=18000.228s UT (05:00:00.228) The light curve shows a bright pulse at ~T0+55 s, preceded by several weaker overlapping pulses. A total burst duration of the burst is ~70 s. The emission is seen up to ~9 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB120602_T18000/...Full Text

IPN Triangulation of GRB 120602A (long/very bright)
Hurley et al.
Posted by Valentin Pal'shin
12/06/14 17:25:50 GMT

The long-duration, very bright GRB 120602A was observed by INTEGRAL (SPI-ACS), Swift (BAT), Konus-Wind, Suzaku (WAM), MESSENGER (GRNS), and Mars Odyssey (HEND) on June 2 at about 18001 s UT (05:00:01). The burst was outside of the coded field of view of the BAT. We have triangulated it to a 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg...Full Text

GRB 120614A: MAXI/GSC detection of a burst
Sugimoto et al.
Posted by Satoshi Nakahira
12/06/14 08:16:59 GMT

MAXI/GSC triggered at 2012-06-14T05:49:10 UT on a bright uncatalogued X-ray transient source. The transient emission lasted at least for 45 seconds within the 56 second long triangular transit response of MAXI/GSC. We identify this event as GRB 120614A. There was no violent variability within the scan transit. Assuming that the source flux was constant over the transit, we obtain the source position...Full Text

GRB 120612A: optical observations
Malesani et al.
Posted by Daniele Malesani
12/06/13 00:32:25 GMT

We observed the field of GRB 120612A (Pagani et al., GCN 13357) with the ESO VLT equipped with X-shooter. Observations were taken with the acquisition camera in the R and z filters, with an exposure time of 45 s each. The images were obtained around 23:25 UT (about 21.3 hr after the GRB). Within the revised XRT error circle (Evans et al., GCN 13359), we do not detect any object in either...Full Text

GRB 120612A: Swift/UVOT observations
Swenson & Pagani
Posted by Craig Swenson
12/06/12 18:08:11 GMT

The Swift/UVOT began settled observations of the field of GRB 120612A 148 s after the BAT trigger (Pagani et al., GCN 13357). No new optical afterglow consistent with the XRT posistion (Evans et al., GCN 13359) is detected in the initial UVOT exposures. We note that there is a DSS source, which complicates the UVOT analysis, located at RA, DEC = 126.72113, -17.57439. This source lies 3.05 arcsec...Full Text



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