This file contains Circulars on both the "A" and "B" 050714 bursts: //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3607 SUBJECT: GRB 050714 - A long GRB detected with INTEGRAL DATE: 05/07/14 01:09:52 GMT FROM: Diego Gotz at IASF-CNR D. Gotz, S. Mereghetti (IASF, Milano), S. Shaw, N. Mowlavi, M. Beck, S. Soldi (ISDC, Versoix) and J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: A 40 s long GRB has been detected by IBAS in IBIS/ISGRI data at 00:05:56 on July 14 2005. Its refined coordinates (J2000) are: RA: 43.5863 [degrees] DEC: +69.1261 [degrees] with an uncertainty of 2.0 arcmin (90% c.l. radius). Its preliminary peak flux (20-200 keV, 1s integration time) is about 0.3 ph (2.6E-08 erg)/cmsq/s. Its fluence (20-200 keV, 40 s integration time) is 6.16E-07 erg/cmsq. A plot of the light curve will be posted at http://ibas.mi.iasf.cnr.it/IBAS_Results.html This message can be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3608 SUBJECT: GRB 050714A: ROTSE-III Optical Limits DATE: 05/07/14 01:31:23 GMT FROM: Brad Schaefer at LSU B. Schaefer (Louisiana State), S.A. Yost (U Mich), H. Swan (U Mich), E.S. Rykoff (U Mich), report on behalf of the ROTSE collaboration: ROTSE-IIId, located at the Turkish National Observatory at Bakirlitepe, Turkey, responded to GRB 050714A (Integral trigger 2598), producing images beginning 9.1 s after the GCN notice time. An automated response took the first image at 00:06:33.1 UT, 27.9 s after the burst, under excellent conditions. We took 10 5-sec, 10 20-sec and 60 60-sec eposures. These unfiltered images are calibrated relative to USNO A2.0 (R). Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma error circle, for both single images and coadding into sets of 10. Individual images have limiting magnitudes ranging from 16.5-17.9; we set the following specific limits. start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd? -------------------------------------------------------------------- 00:06:33.1 0:06:38.1 5 16.6 27.9 N 00:06:33.1 0:08:55.1 142 18.2 27.9 Y //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3609 SUBJECT: GRB 050714, optical observations DATE: 05/07/14 10:49:34 GMT FROM: Sylvio Klose at TLS Tautenburg S. Klose, B. Stecklum, B. Fuhrmann, F. Ludwig, Thueringer Landessternwarte Tautenburg, and J. Greiner, MPE Garching, report: The field of GRB 050714 was observed with the Tautenburg Schmidt telescope using for the first time the semi-robotic mode. In this mode the telescope software is watching for a special SMS message created in Garching which is extracted from the BACODINE notifications. As a result, if a burst happens the coordinates of the GRB error box are automatically uploaded into the current target data file, and the telescope software is waiting for an OK to be given by the telescope operator. In this respect human intervention is mandatory, so that this mode is not fully robotic (which is indeed not forseen because of security reasons). Observations of GRB 050714 started at 0:24 UT on July 14, i.e. 18 min after the onset of the burst (Gotz et al. 2005, GCN 3607). A sequence of several I, R, and V-band images was taken starting with the I-band (several 2 min exposures). Observations continued until 1:50 UT (twilight). A first inspection of the combined images shows no new bright source in the GRB error circle (90% c.l.; Gotz et al. 2005). However, we detect two potentially variable objects. Source #1, at RA, DEC (J2000) 02:54:47.05, 69:08:04.2, is listed in the USNO-B catalogue. It is relatively bright on our combined I-band image (we estimate I~17), and also visible on our combined R-band image, but has no obvious counterpart on the DSS2 red image. This object lies slightly outside the 2' error circle. Source #2, at RA, DEC (J2000) 02:54:19.46, 69:08:59.7, has a faint DSS2-red counterpart but is notably brighter on our R-band images than on the DSS2 red. This source lies inside the GRB error circle. Because of the telescope schedule in Tautenburg, no 2nd epoch observations can be performed by the end of July. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3610 SUBJECT: GRB 050714: Swift XRT afterglow position DATE: 05/07/14 18:11:01 GMT FROM: Judith Racusin at PSU J.L. Racusin, J.A. Kennea, D.N. Burrows (PSU), T. Roberts, K. Page (U. Leicester), N. Gehrels (NASA/GSFC), on behalf of the Swift XRT team: INTEGRAL detected GRB050714 at 00:05:56 UT on July 14th 2005 (GCN Circ 3607). The Swift observatory executed a Target of Opportunity observation of the INTEGRAL position and the XRT began taking data at 13:46:16 UT, 13.7 hours after the burst. In preliminary ground processing of the data, we detect an uncatalogued apparently fading X-ray source located at: RA(J2000) = 02 54 21.9, Dec(J2000) = +69 06 43 We estimate an uncertainty of 9 arcseconds radius (90% containment). This position is 52 arcseconds from the INTEGRAL position reported in GCN 3607. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3611 SUBJECT: GRB 050714, R-band candidate DATE: 05/07/14 18:41:40 GMT FROM: Sylvio Klose at TLS Tautenburg S. Klose, B. Stecklum, Thueringer Landessternwarte Tautenburg, and J. Greiner, MPE Garching, report: The Tautenburg R-band image of the field of GRB 050714 (Klose et al., GCN 3609) shows a faint source in the revised 9 arcsec GRB error circle (Racusin et al. 2005, GCN 3610) at RA, DEC (J2000) = 2:54:21.68, 69:06:40.3, for which we estimate R~21. This source is not visible on the I-band image, implying I>~20. No accurate photometry has been performed so far. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3613 SUBJECT: Swift detection of a long transient (GRB 050714B?) DATE: 05/07/15 00:25:37 GMT FROM: Andrew Levan at U.of Leicester A. Levan, A. Beardmore, K. Page, J. Osborne, E. Rol (U. Leicester) S. Barthelmy, J. Cannizzo (GSFC-UMBC), L. Cominsky (Sonoma State U.), H. Krimm (GSFC), C. Markwardt (GSFC/UMD), D. Palmer (LANL), T. Sakamoto (GSFC), C. Gronwall, D. Burrows, P. Roming, J. Kennea (PSU) and N. Gehrels (GSFC) report for the Swift team. At 22:40:32 UT, Swift-BAT triggered (trigger=145994) and located on-board a source. The flight-determined location is RA,Dec 169.694, -15.528 {+11h 18m 47s, -15d 31' 39"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys). The spacecraft was on target at approximately 150 seconds. This was a very weak 64-sec image-trigger detection right at the image-trigger threshold (10.1 sigma). There are no "peaks" in the BAT lightcurve, which is consistent with a long low-amplitude event, and that it was an image trigger and not a rate trigger. At this early stage in the analysis, we can not distinguish between a long GRB and a hard X-ray transient. However, we do think that it is from a real astrophysical source. The spacecraft slewed immediately and the XRT began observing the burst at 22:43:00.6 UT (151 s after the BAT trigger). XRT found a bright, uncatalogued, fading X-ray source. The position, calculated with xrtcentroid on the TDRSS postage stamp image, is: RA: 11h 18m 47.9s (J2000), Dec: -15d 32' 55.5" (J2000). This position is 76.5 arcseconds from the BAT position. The estimated uncertainty is 6 arcseconds radius (90% containment). The Swift Ultra Violet/Optical Telescope (UVOT) observations began at 22:43:03 UT, 151 seconds after the BAT trigger. The first data taken after the spacecraft settled was a 100 seconds exposure using the V filter with the midpoint of the observation at 201 seconds after the BAT trigger. There is no new source at the XRT position. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3614 SUBJECT: GRB 050714B: optical afterglow DATE: 05/07/15 01:19:48 GMT FROM: Daniele Malesani at SISSA-ISAS,Trieste,Italy D. Malesani (SISSA/ISAS), P. D'Avanzo (INAF, OABr), G.L. Israel, S. Piranomonte (INAF, OARm), G. Chincarini (Univ Milano-Bicocca), L. Stella (INAF, OARm), G. Tagliaferri (INAF, OABr), E. Depagne (ESO), report: We observed the field of GRB 050714B with the ESO VLT-UT2 (Kueyen) equipped with the FORS1 instrument. The observing conditions were moderate, with a seeing of ~1.4 arcsec. Exposures were carried out in the R band, starting on 2005 Jul 14, 23:37 UT (56 min after the GRB). Inspection of the XRT error circle (Levan et al., GCN 3613) shows a bright, single object not visible in the DSS at the approximate coordinates (error ~1"): alpha(J2000) = 11:18:47.8 delta(J2000) = -15:32:52.6 Its magnitude is brighter than the DSS limit, so we suggest that this object is the afterglow of GRB 050714B. This message can be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3615 SUBJECT: GRB050714B: Refined analysis of the Swift-BAT burst DATE: 05/07/15 02:40:16 GMT FROM: Scott Barthelmy at NASA/GSFC J. Tueller (GSFC), S. Barthelmy, L. Barbier (GSFC), J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (NASA GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), on behalf of the Swift-BAT team: Using the full data set from the recent telemetry downlink, we report further analysis of Swift-BAT Trigger #145994 (Levan, et al., GCN 3613). The ground-analysis position is RA,Dec 169.697,-15.535 (J2000). The event-by-event data yields a lightcurve with a broad bump starting at T+15 sec and ending at T+70 sec. The spectrum over the interval from T-19 to T+68 seconds is soft. The simple power law photon index is 2.6 +/- 0.3 with a fluence of 6.5 +/- 1.4 X 10^-7 erg/cm^2 in the 15-350 keV band (90% c.l.). The peak flux in a 1-sec wide window starting at T+55 seconds is 0.5 +/- 0.2 ph/cm^2/sec. Although we can not rule out a hard x-ray transient source, it is more likely a real GRB, albeit on the soft end of the distribution. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3616 SUBJECT: GRB 050714B: candidate afterglow does not fade DATE: 05/07/15 04:04:44 GMT FROM: Daniele Malesani at SISSA-ISAS,Trieste,Italy S. Covino, P. D'Avanzo (INAF, OABr), D. Malesani (SISSA/ISAS), G.L. Israel, S. Piranomonte (INAF, OARm), G. Tagliaferri (INAF, OABr), G. Chincarini (Univ Milano-Bicocca), L. Stella (INAF, OARm), report: Photometric analysis of our set of images of GRB 050714B (Levan et al., GCN 3613; Tueller et al., GCN 3615) taken with the VLT-FORS1 in the R band does not confirm the proposed identification of the object reported by Malesani et al. (GCN 3614) as the candidate optical afterglow. The object shows constant brightness between Jul 14.984 UT and Jul 15.040 UT (from 56 to 137 minutes after the GRB, respectively) at about R = 21.7, taking as reference the USNO star U0675-11455984 with magnitude R = 15.3. A light curve for this object can be seen at the following URL: http://www.sissa.it/~malesani/GRB/050714B/candidate_lc.gif We give below the refined coordinates for the candidate, adopting an astrometric solution based on the 2MASS catalog: alpha(J2000) = 11:18:47.71, delta(J2000) = -15:32:51.6 The error is 0.2 arcsec. We note that two fainter objects are present close to the edge of the XRT error circle A: alpha(J2000) = 11:18:47.71, delta(J2000) = -15:33:00.9 B: alpha(J2000) = 11:18:48.19, delta(J2000) = -15:32:50.3 None of such objects is seen to vary by more than ~0.1 mag. A finding chart can be found here: http://www.sissa.it/~malesani/GRB/050714B/GRB050714B_finder.jpg This message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3618 SUBJECT: GRB 050714B: refined XRT analysis DATE: 05/07/15 11:26:34 GMT FROM: Andrew Levan at U.of Leicester K. Page, A. Beardmore, A. Levan, E. Rol, J.P. Osborne (U. Leicester), D. Morris, D. Burrows (PSU), A. Smale (NASA HQ), L. Cominsky (Sonoma State U.) and N. Gehrels (GSFC) report for the Swift XRT team: We have analysed the XRT data for GRB 050714B taken 157-18700 seconds after the trigger. PSF fitting of the candidate afterglow in the photon counting (PC) mode observations yields a refined position of RA: 11h 18m 48.0s (J2000) Dec:-15d 32m 49.9s (J2000) with an uncertainty of 6 arcseconds (90%). This position is offset approximately 5.5 arcseconds from the position reported in GCN 3613 and does not contain object "A" found by Covino et al (GCN 3616). XRT observations began in Windowed Timing (WT) mode 157 seconds after the trigger and show a steep decline with a power-law decay index between 5 and 6, lasting for approximately 300 seconds. This is followed by a rise, which peaks 400 seconds after the trigger and was recorded in PC mode. No observations were performed between 546 and 5000 seconds. In the interval 5000-18700 seconds a shallower decay of approximately 0.7 was seen. The behaviour is similar to that which has been seen in many Swift afterglows and indicates that this transient is, most likely, a GRB. The spectrum of the early afterglow is exceptionally soft, having a photon index of ~ 6, with evidence of spectral evolution between the WT and PC mode observations. The mean unabsorbed fluxes in WT mode (157-220 seconds) and PC mode (221-546 seconds) are 3.4e-9 and 1.7e-9 ergs/s/cm^2 respectively, in the 0.5-10 keV range. We note, however, that no flux was detected above 2 keV by the XRT. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3620 SUBJECT: Swift UVOT Observations of GRB 050714B DATE: 05/07/15 18:44:37 GMT FROM: Caryl Gronwall at PSU/Swift-UVOT C. Gronwall, A. Morgan, P. Roming (PSU), A. Levan (U. Leicester), M. Ajello (MPE), M. Trippico (GSFC-SSAI), N. Gehrels (GSFC) report on behalf of the Swift UVOT team: We have analyzed the UVOT data for GRB 050714B (Levan et al., GCN 3613; Tueller et al., GCN 3615) taken 195 to 41743 seconds (approximately 12 hours) after the trigger. We detect a faint extended source in a summed ultraviolet image with a total exposure time of 8936 seconds located at RA = 11:18:48.26, Dec = -15.:32:50.87. This location is within the refined XRT error circle reported by Page et al. (GCN 3618). At this time, we cannot determine if this source is fading. We note that this source position is consistent with the position of one of the faint sources (source B) detected in the VLT-FORS1 R-band observations reported by Covino et al. (GCN 3616). //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3644 SUBJECT: GRB 050714B: VLT R-band observations DATE: 05/07/19 13:12:39 GMT FROM: Daniele Malesani at SISSA-ISAS,Trieste,Italy P. D'Avanzo, S. Covino (INAF, OABr), G.L. Israel, S. Piranomonte (INAF, OARm), D. Malesani (SISSA/ISAS), G. Tagliaferri (INAF, OABr), G. Chincarini (Univ Milano-Bicocca), L. Stella (INAF, OARm), report: The field of GRB 050714B (Levan et al., GCN 2613; Tueller et al., GCN 3615) was observed again with the ESO VLT-UT2. Ten exposures lasting 180 s were acquired with the FORS1 instrument (mean time 2005 Jul 17.97, that is 3.03 days after the GRB). These images go deeper than our previous dataset (Covino et al., GCN 3616). In addition to sources 1 and B reported by Covino et al. (GCN 3616), we find two more fainter sources lying at the edge of the XRT error circle (Levan et al., GCN 3614; Page et al., GCN 3618): C: alpha = 11:18:48.24, delta = -15:32:54.3 (J2000); D: alpha = 11:18:48.40, delta = -15:32:53.3 (J2000). An updated finding chart is posted at the following URL: http://www.sissa.it/~malesani/GRB/050714B/finder_epoch2.jpg When compared to our previous images, sources 1 and B do not show variability within the photometric errors. Source B is coincident with the UVOT object (Gronwall et al., GCN 3620) and is extended also in our images. At the present stage, therefore, no object can be easily singled out as the GRB afterglow, although source B could be the GRB host galaxy. We thank the ESO staff for excellently performing these observations in service mode. This message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3649 SUBJECT: GRB 050714a: Refined XRT analysis and afterglow confirmation DATE: 05/07/19 19:59:34 GMT FROM: Tim Roberts at Leicester U/BA T.P. Roberts, K. Page, A. Beardmore (U. Leicester), J.L. Racusin, J.A. Kennea (PSU), N. White (GSFC), D. Hinshaw (GSFC-SPSYS) report on behalf of the Swift XRT team: We have re-analysed the complete Swift dataset from the TOO observation of the INTEGRAL-detected GRB050714a (see GCN circ. 3610), beginning 13.7 hours after the burst. The new refined coordinates of the afterglow candidate are: RA(J2000) = 02 54 22.2 Dec(J2000) = +69 06 46 We estimate an uncertainty of 6.9 arcseconds on this position (90% containment). However, we were unable establish from this data whether the source was definitely fading due its low count rate. Swift began a second observation of this GRB at 00:05 UT on 19th July 2005 (5.0 days since the burst event). In 9.7 ks of data we do not detect the candidate afterglow. Hence we confirm that the behaviour of the X-ray source identified in our first circular is consistent with it being the afterglow of GRB 050714a. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3651 SUBJECT: GRB050714b: Radio Observation DATE: 05/07/20 17:51:29 GMT FROM: Patrick B. Cameron at Caltech P. B. Cameron reports on behalf of the Caltech-NRAO-Carnegie collaboration: "We observed the field of GRB050714b (GCN 3613) with the Very Large Array at 8.5 GHz on July 19.98. No radio source is detected within the XRT error circle (GCN 3618) with a 2-sigma upper limit of 102 uJy. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc." //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3789 SUBJECT: RBO GRB 050714A and GRB 050716 observations DATE: 05/08/13 12:09:45 GMT FROM: Ron Canterna at U of Wyoming C. Rodgers, E. Hausel, D. Allen and R. Canterna report on behalf of the Red Buttes Observatory GRB Team as part of the FUN GRB Collaboration. We responded to GRB 050714A (GCN 3607) at 05:11:41 UT with a series of 10 minute R and I exposures centered on the positon of the original Integral GRB Position under excellent conditions. No new source was detected after comparison with DSS. UT Time Since Filter Limiting Start GRB Magnitude 05:11 5:06 I 17.4 05:33 5:28 R 18.4 05:43 5:38 R 18.4 We also responded to GRB 050716 (GCN 3623) at 2005-07-17 05:52:03 UT. We took a series of 5 and 10 minute exposures in R and I with limiting magnitues of 18.6 in R and 17.4 in I. These observations were started 17 hours after the BAT trigger. No new source was detected after comparison with DSS. 10 sigma limiting magnitudes were derived from the USNO-B1.0 catalogue