GRB140215A

This page lists all entries on GRB140215A in GRBweb

Summary IPN Swift GCN 15837 GCN 15838 GCN 15839 GCN 15840 GCN 15841 GCN 15842 GCN 15843 GCN 15844 GCN 15845 GCN 15846 GCN 15847 GCN 15848 GCN 15849 GCN 15850 GCN 15852 GCN 15853 GCN 15855 GCN 15857 GCN 15858 GCN 15861

Summary table
Variable Value Source
T0 4:07:10 UTC GCN_circulars,Swift Det
ra 104.1492° Swift
decl 41.7866° Swift
pos_error 6.47e-05° Swift
T90 84.2 s Swift
T90_start 4:07:10 UTC Swift
fluence 7.80e-06 erg/cm² Swift
T100 84.2 s
GBM_located False
mjd 56703.171643518515 GCN_circulars,Swift Det
IPN table
GRB_name GRB140215A
ra 104.1375°
decl 41.7833°
pos_error 5.00e-02°
Swift table
GRB_name GRB140215A
t_trigger 4:07:10 UTC
ra 104.1492°
decl 41.7866°
pos_error 6.47e-05°
T90 84.2 s
fluence 7.80e-06 erg/cm²
GCN 15837 table
GRB_name GRB140215A
GCN_number 15837
Detection_method Swift Det
t_trigger 4:07:10 UTC
ra 104.1360°
decl 41.7800°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15837 SUBJECT: GRB 140215A: Swift detection of a burst with optical counterpart DATE: 14/02/15 04:16:28 GMT FROM: David Palmer at LANL C. B. Markwardt (NASA/GSFC), S. D. Barthelmy (GSFC), L. M. Z. Hagen (PSU), J. A. Kennea (PSU), V. Mangano (PSU), F. E. Marshall (NASA/GSFC), C. J. Mountford (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Swift Team: At 04:07:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140215A (trigger=586680). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 104.136, +41.780 which is RA(J2000) = 06h 56m 33s Dec(J2000) = +41d 46' 49" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a couple of overlapping FRED-like peaks with a duration of about 25 sec. The peak count rate was ~4500 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 04:09:08.0 UT, 117.7 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 104.1489, 41.7858 which is equivalent to: RA(J2000) = +06h 56m 35.74s Dec(J2000) = +41d 47' 08.9" with an uncertainty of 6.1 arcseconds (radius, 90% containment). This location is 40 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy. The initial flux in the 2.5 s image was 6.19e-10 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 150 seconds with the White filter starting 125 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at RA(J2000) = 06:56:35.83 = 104.14928 DEC(J2000) = +41:47:11.8 = 41.78660 with a 90%-confidence error radius of about 0.74 arc sec. This position is 3.1 arc sec. from the center of the XRT error circle. The estimated magnitude is 15.08 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.09. Burst Advocate for this burst is C. B. Markwardt (Craig.Markwardt AT nasa.gov). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN 15838 table
GRB_name GRB140215A
GCN_number 15838
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15838 SUBJECT: GRB140215A: Prompt Observations with Discovery Channel Telescope DATE: 14/02/15 04:34:40 GMT FROM: S. Bradley Cenko at NASA/GSFC S.B. Cenko (NASA-GSFC), V. Toy (UMD), A. Kutyrev (NASA-GSFC), J. Capone (UMD), E. Troja (NASA-GSFC), A. Cucchiara (NASA-GSFC), S. Veilleux (UMD), and S. Gezari (UMD) report on behalf of a larger collaboration: We imaged the location of the Swift GRB140215A (Markwardt et al., GCN 15837) with the Large Monolithic Imager mounted on the 4.3m Discovery Channel Telescope. Observations began at 4:09:50 UT on 15 February 2014, ~ 2.7 min after the Swift BAT trigger time, and were taken under sub-optimal conditions (moderate cloud cover and bright moon). We detect the bright optical afterglow in individual exposures beginning at this time. Using several nearby point sources from USNO-B1 reference, we measure a magnitude of r' ~ 13.5 mag in our first exposure. Multi-color observations are ongoing. We thank the entire staff of the Discovery Channel Telescope for assistance with these observations.
GCN 15839 table
GRB_name GRB140215A
GCN_number 15839
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15839 SUBJECT: GRB 140215A: KAIT Optical Detection DATE: 14/02/15 04:50:23 GMT FROM: Weikang Zheng at UC Berkeley WeiKang Zheng, Alexei V. Filippenko, Adam Morgan (UC Berkeley), and S. B. Cenko (NASA/Goddard Space Flight Center) report on behalf of the KAIT GRB team: The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, responded to Swift GRB 140215A (Markwardt et al., GCN 15837) starting at 04:09:02 UT, 112 s after the burst. Observations were performed with an automatic sequence in the V, I and clear (roughly R) filters, and the exposure time was 20 s per image. We detect the bright optical afterglow (Markwardt et al., GCN 15837; Cenko et al., GCN 15838) in all the individual images. The afterglow decayed from mag~13.7 (mid t-t0=189s) to mag~15.9 (mid t-t0=1094s) in our clear band images calibrated to USNO B1.0 catalog. Observations are on going.
GCN 15840 table
GRB_name GRB140215A
GCN_number 15840
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15840 SUBJECT: GRB140215A: Skynet PROMPT Optical Observations DATE: 14/02/15 05:45:47 GMT FROM: Aaron LaCluyze at U.North Carolina A. LaCluyze, J. Haislip, D. Reichart, A. Trotter, A. Foster, N. Frank, K. Ivarsen, J. Moore, M. Nysewander, R. Beauchemin, T. Berger, M. Carroll, H. T. Cromartie, R. Egger, M. Hinckle, A. Ireland, M. Maples, L. Scott, and J. A. Crain report: Skynet observed the Swift-BAT localization of GRB 140215A (Markwardt et al., GCN 15837, Swift trigger 586680) with six of the PROMPT telescopes located at CTIO in Chile. Observations began at ~59s after the burst in BVRI and luminance. We detect a fading optical source in all bands at the position of the source detected by Markwardt et al. A preliminary light curve calibrated to USNOB and NOMAD catalog stars can be found at: http://www.skynet.unc.edu/grb/grb140215a.png Further observations are ongoing.
GCN 15841 table
GRB_name GRB140215A
GCN_number 15841
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15841 SUBJECT: GRB 140215A: RATIR Optical and NIR Observations DATE: 14/02/15 05:53:42 GMT FROM: Nat Butler at Az State U Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos A. de Diego (UNAM), Leonid Georgiev (UNAM), Jess Gonzlez (UNAM), Carlos Romn-Ziga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report: We observed the field of GRB 140215A (Markwardt, et al., GCN 15837) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astronmico Nacional on Sierra San Pedro Mrtir beginning 110 seconds after the Swift BAT trigger. Initial data were taken out-of-focus, and will require special handling. In-focus data were acquired from 2014/02 15.20 to 2014/02 15.22UTC (0.65 to 1.13 hours after the BAT trigger), corresponding to a total of 0.36 hours exposure in the r and i bands and 0.15 hours exposure in the Z, Y, J, and H bands. For a source within the Swift UVOT error circle, in comparison with 2MASS, we obtain the following detections: r 17.45 +/- 0.01 i 17.08 +/- 0.01 Z 16.82 +/- 0.01 Y 16.55 +/- 0.02 J 16.34 +/- 0.01 H 16.05 +/- 0.01 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. We thank the staff of the Observatorio Astronmico Nacional in San Pedro Mrtir. Further observations are ongoing.
GCN 15842 table
GRB_name GRB140215A
GCN_number 15842
Detection_method Swift-XRT Det
ra 104.1492°
decl 41.7863°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15842 SUBJECT: GRB 140215A: Enhanced Swift-XRT position DATE: 14/02/15 08:38:14 GMT FROM: Phil Evans at U of Leicester P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team. Using 2359 s of XRT Photon Counting mode data and 4 UVOT images for GRB 140215A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 104.14917, +41.78625 which is equivalent to: RA (J2000): 06h 56m 35.80s Dec (J2000): +41d 47' 10.5" with an uncertainty of 1.7 arcsec (radius, 90% confidence). This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN 15843 table
GRB_name GRB140215A
GCN_number 15843
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15843 SUBJECT: GRB 140215A: T24 optical observations DATE: 14/02/15 11:01:22 GMT FROM: Veli-Pekka Hentunen at Taurus Hill Obs,A95 Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill Observatory, Varkaus, Finland) report: We have detected GRB 140215A optical afterglow at iTelescope observatory T24 (Auberry, California) using 0.61-m/6.5 astrograph and FLI-PL09000 CCD camera. The observations were started at 2014-02-15 04:33:26 (UT) and stopped at 06:05:49 (UT). Fourteen photometric V filter images and eight unfiltered images with different exposure time were made. The afterglow was detected at the following position RA 06:56:35.84 and DEC +41:47:11.5. The following magnitudes were obtained from the observations using NOMAD1 1317-0185429 (V= 13.190 and R=13.190) as a comparison star: Tmid(s)+T0 Filter Exp. time Mag Mag err. 1107 V 3x60s 17.00V 0.12 2090 V 3x120s 17.30V 0.13 3283 V 3x60s 17.96V 0.34 3678 V 3x120s 17.97V 0.21 4496 V 2x300s 18.44V 0.20 5817 unfiltered 3x60s 18.67CR 0.32 6224 unfiltered 3x120s 18.89CR 0.25 6797 unfiltered 2x300s 19.07CR 0.21 --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com
GCN 15844 table
GRB_name GRB140215A
GCN_number 15844
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15844 SUBJECT: GRB 140215A: P60 observations DATE: 14/02/15 11:03:31 GMT FROM: Daniel Perley at Caltech D. A. Perley (Caltech) and S. B. Cenko (NASA-GSFC) report: The Swift-BAT alert for GRB 140215A (Markwardt et al., GCN 15837) automatically triggered the Palomar 60-inch telescope, which slewed to the position and began started a sequence of r, i, and z images beginning at 04:09:54 UT, 2.74 minutes after the initial trigger. The optical afterglow is well-detected in all images and filters, and follow-up has continued through to the present time. The afterglow light curve fades as a simple unbroken power-law with a decay index of alpha=1.19 throughout this period. Calibrating relative to USNO-B1.0, we estimate a magnitude (in the most recent imaging, at 387 minutes post-trigger) of R = 19.93 +/- 0.13 mag. Spectroscopic follow-up is encouraged.
GCN 15845 table
GRB_name GRB140215A
GCN_number 15845
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15845 SUBJECT: GRB 140215A: Swift-XRT refined Analysis DATE: 14/02/15 16:18:01 GMT FROM: Kim Page at U.of Leicester K.L. Page (U. Leicester) and C. B. Markwardt (NASA/GSFC) report on behalf of the Swift-XRT team: We have analysed 7.8 ks of XRT data for GRB 140215A (Markwardt et al. GCN Circ. 15837), from 124 s to 18.2 ks after the BAT trigger. The data comprise 159 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 15842). The light curve can be modelled with a power-law decay with a decay index of alpha=1.21 (+/-0.03). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.49 (+0.12, -0.07). The best-fitting absorption column is consistent with the Galactic value of 9.7 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.91 (+0.18, -0.17) and a best-fitting absorption column of 1.7 (+/-0.5) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.0 x 10^-11 (5.4 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 1.7 (+/-0.5) x 10^21 cm^-2 Galactic foreground: 9.7 x 10^20 cm^-2 Excess significance: 2.5 sigma Photon index: 1.91 (+0.18, -0.17) If the light curve continues to decay with a power-law decay index of 1.21, the count rate at T+24 hours will be 5.1 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.0 x 10^-13 (2.8 x 10^-13) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00586680. This circular is an official product of the Swift-XRT team.
GCN 15846 table
GRB_name GRB140215A
GCN_number 15846
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15846 SUBJECT: GRB 140215A: ISON-NM optical observations DATE: 14/02/15 20:32:45 GMT FROM: Alexei Pozanenko at IKI, Moscow L. Elenin (KIAM), A. Volnova (IKI), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed of the field of the Swift GRB 140215A (Markwardt et al., GCN 15837) with 0.4-m telescope of ISON-NM observatory starting on Feb., 15 (UT) 04:08:22, i.e 72 seconds after Swift burst trigger. We took 35 unfiltered images of 30 s exposures. We clearly detect the bright optical afterglow of GRB 140215A (Markwardt et al., GCN 15837; Cenko et al., GCN 15838) in each separate image. Coordinates of the optical afterglow (J2000) 06 56 35.83 +41 47 11.4 (uncertainties of 0.5 arcsec) coincide with OT coordinates (Markwardt et al., GCN 15837). Preliminary photometry is following: UT mid, T0+ Filter Exposure, OT, err OT mid s 04:08:22 0.00101 none 30 13.60 0.03 04:37:01 0.02090 none 30 16.46 0.20 The photometry is based on USNO-B1.0 nearby stars: N USNO-B1.0id RA Dec R2 1 1318-0183851 06:56:13.01 +41:49:29.2 12.37 2 1317-0181981 06:56:37.13 +41:44:34.4 14.39 3 1317-0181986 06:56:38.48 +41:44:12.8 14.50 The power law index of ~-1.2 of our light curve starting from 0.0025 days and up to the end of our observations coincides with the index reported by Perley and Cenko (GCN 15844).
GCN 15847 table
GRB_name GRB140215A
GCN_number 15847
Detection_method Swift-BAT Det
ra 104.1290°
decl 41.7870°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15847 SUBJECT: GRB 140215A: Swift-BAT refined analysis DATE: 14/02/15 22:06:04 GMT FROM: Scott Barthelmy at NASA/GSFC S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+824 sec from recent telemetry downlinks, we report further analysis of BAT GRB 140215A (trigger #586680) (Markwardt, et al., GCN Circ. 15837). The BAT ground-calculated position is RA, Dec = 104.129, 41.787 deg, which is RA(J2000) = 06h 56m 31.0s Dec(J2000) = +41d 47' 12.2" with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 15%. The mask-weighted light curve shows several overlapping peaks starting at ~T-15 sec, peaking at ~T+1 sec, and ending at ~T+180 sec. T90 (15-350 keV) is 84.2 +- 53.1 sec (estimated error including systematics). The time-averaged spectrum from T-1.47 to T+181.76 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.19 +- 0.08. The fluence in the 15-150 keV band is 7.8 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.01 sec in the 15-150 keV band is 7.9 +- 0.7 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/586680/BA/
GCN 15848 table
GRB_name GRB140215A
GCN_number 15848
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 15848 SUBJECT: GRB 140215A: MITSuME Okayama Optical Observation DATE: 14/02/16 02:19:26 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of MITSuME collaboration: We observed the field of GRB 140215A (Markwardt et al., GCNC 15837) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory. The observation started on 2014-02-15 10:03:22 UT (~5.9 h after the burst). We detected the previously reported afterglow (Markwardt et al., GCNC 15837; Cenko et al., GCNC 15838) in Rc and Ic bands. Photometric results and three sigma upper limit of the OT are listed below. We used GSC2.3 catalog for flux calibration. #T0+[day] MID-UT T-EXP[sec] g' Rc Rc_err Ic Ic_err ------------------------------------------------------------------ 0.26209 10:24:34 2880.0 >19.6 18.9 0.2 18.6 0.3 ------------------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 15849 table
GRB_name GRB140215A
GCN_number 15849
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15849 SUBJECT: GRB 140215A: Continued RATIR Optical and NIR Observations DATE: 14/02/16 17:45:42 GMT FROM: Owen Littlejohns at Az State U Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Enrico Ramirez-Ruiz (UCSC), Jos A. de Diego (UNAM), Leonid Georgiev (UNAM), Jess Gonzlez (UNAM), Carlos Romn-Ziga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report: We again observed the field of GRB 140215A (Markwardt, et al., GCN 15837) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astronmico Nacional on Sierra San Pedro Mrtir from 2014/02 16.20 to 2014/02 16.36 UTC (24.65 to 28.57 hours after the BAT trigger), obtaining a total of 2.18 hours exposure in the r and i bands and 0.88 hours exposure in the Z, Y, J, and H bands. We continue to detect the previously reported source in all bands, at fainter magnitudes than the previous epoch of RATIR observations (Butler et al., GCN 15841). In comparison with 2MASS, we obtain the following detections: r 21.51 +/- 0.11 i 21.19 +/- 0.10 Z 21.37 +/- 0.24 Y 20.68 +/- 0.21 J 20.69 +/- 0.16 H 20.43 +/- 0.18 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. In comparison to the previous epoch of RATIR observations the source has faded with approximate power-law index of t^-1 in all bands. We thank the staff of the Observatorio Astronmico Nacional in San Pedro Mrtir.
GCN 15850 table
GRB_name GRB140215A
GCN_number 15850
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15850 SUBJECT: GRB140215A: Continued Discovery Channel Telescope Observations DATE: 14/02/16 18:08:36 GMT FROM: Vicki Toy at UMD V. Toy (UMD), S.B. Cenko (NASA-GSFC), A. Kutyrev (NASA-GSFC), J. Capone (UMD), E. Troja (NASA-GSFC), A. Cucchiara (NASA-GSFC), S. Veilleux (UMD), and S. Gezari (UMD) report on behalf of a larger collaboration: We re-observed the bright optical afterglow of GRB140215A (Swift trigger 586680, Markwardt et al., GCN 15837, Cenko et al., GCN 15840) with the Large Monolithic Imager (LMI) on the 4.3m Discovery Channel Telescope (DCT) at Happy Jack, AZ from 2014/02/16 2:55 to 2014/02/16 4:05 UTC (0.95-1.0 days after the Swift-BAT trigger) in the g',r',i', and z' filters. Compared with our previous observations, the afterglow continues to follow an unbroken power law with decay index of alpha=-1.20 in all filters (Perley et al., GCN 15844, and Elenin et al., GCN 15846), consistent with the simultaneous temporal decay observed in the X-rays (Page et al., GCN 15845). Specifically we measure r' = 21.6 mag (AB) at a time of 23.5 hr after the trigger, calibrating relative to USNO-B1. We thank the entire staff of the Discovery Channel Telescope for assistance with these observations.
GCN 15852 table
GRB_name GRB140215A
GCN_number 15852
Detection_method Swift-UVOT Det
ra 104.1492°
decl 41.7866°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15852 SUBJECT: GRB 140215A: Swift/UVOT Detection DATE: 14/02/17 00:15:50 GMT FROM: Lea Hagen at PSU L. M. Z. Hagen (PSU) and C. B. Markwardt (NASA/GSFC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 140215A 126 s after the BAT trigger (Markwardt et al., GCN Circ. 15837). A source consistent with the XRT position (Evans et al. GCN Circ. 15842) is detected in the initial UVOT exposures. The preliminary UVOT position is: RA (J2000) = 06:56:35.81 = 104.14920 (deg.) Dec (J2000) = +41:47:11.7 = 41.78659 (deg.) with an estimated uncertainty of 0.50 arc sec. (radius, 90% confidence). Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white (fc) 125 275 147 15.01 +/- 0.04 white 617 637 19 16.26 +/- 0.07 v 106 117 10 14.34 +/- 0.09 b 593 612 19 16.19 +/- 0.09 u 337 587 245 15.53 +/- 0.05 w1 4611 4811 196 >19.86 m2 4406 4606 196 >19.51 w2 642 662 19 >17.93 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.09 in the direction of the burst (Schlegel et al. 1998). We note that the white photometry may be affected by a nearby bright foreground star.
GCN 15853 table
GRB_name GRB140215A
GCN_number 15853
Detection_method Konus-Wind Det
t_trigger 4:07:11.638 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 15853 SUBJECT: Konus-Wind observation of GRB 140215A DATE: 14/02/17 15:10:00 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, D. Frederiks, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report: The long-duration GRB 140215A (Swift-BAT trigger 586680: Markwardt et al., GCN 15837; Barthelmy et al., GCN 15847) triggered Konus-Wind at T0=14831.638 s UT (04:07:11.638). The burst light curve shows a multi-peaked with a total duration of ~15 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/GRB140215_T14831/ As observed by Konus-Wind, the burst had a fluence of (1.84 0.15)x10-5 erg/cm2, and a 64-ms peak flux, measured from T0+4.800 s, of (3.57 0.35)x10-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum (measured from T0 to T0+15.360 s) is best fit in the 28 keV - 15 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = -0.66 0.11, the high energy photon index beta = -2.94 0.35, the peak energy Ep = 214 14 keV, chi2 = 106/95 dof. The spectrum near the maximum count rate (measured from T0 to T0+7.168 s) is best fit in the 20 keV - 15 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = -0.46 0.12, the high energy photon index beta = -2.83 0.26, the peak energy Ep = 212 14 keV, chi2 = 92.9/96 dof. All the quoted values are preliminary.
GCN 15855 table
GRB_name GRB140215A
GCN_number 15855
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15855 SUBJECT: GRB 140215A: Continued RATIR Optical and NIR Observations DATE: 14/02/17 17:12:25 GMT FROM: Nat Butler at Az State U Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos A. de Diego (UNAM), Leonid Georgiev (UNAM), Jess Gonzlez (UNAM), Carlos Romn-Ziga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report: We again observed the field of GRB 140215A (Markwardt,, et al., GCN 15837) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astronmico Nacional on Sierra San Pedro Mrtir from 2014/02 17.11 to 2014/02 17.20 UTC (46.46 to 48.60 hours after the BAT trigger), obtaining a total of 1.41 hours exposure in the r and i bands and 0.58 hours exposure in the Z, Y, J, and H bands. For a source within the Swift-UVOT error circle, in comparison with 2MASS, we obtain the following detections and upper limits (3-sigma): r 22.19 +/- 0.24 i 21.65 +/- 0.16 Z > 21.45 Y > 20.71 J > 20.61 H > 20.12 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. Compared to our observations last night (Littlejohns et al., GCN 15849), the source flux is consistent with a continued fading as t^-1. We thank the staff of the Observatorio Astronmico Nacional in San Pedro Mrtir.
GCN 15857 table
GRB_name GRB140215A
GCN_number 15857
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15857 SUBJECT: GRB 140215A: WSRT radio observation DATE: 14/02/18 09:22:49 GMT FROM: Alexander van der Horst at U of Amsterdam A.J. van der Horst (University of Amsterdam) reports on behalf of a large collaboration: "We observed the position of the GRB 140215A afterglow at 4.9 GHz with the Westerbork Synthesis Radio Telescope at February 17 14.69 UT to February 18 02.66 UT, i.e. 2.44 - 2.94 days after the burst (GCN 15837). We do not detect a radio source at the position of the optical counterpart (GCN 15852). The three-sigma rms noise in the map around that position is 126 microJy per beam. The formal flux measurement for a point source at the position of the optical counterpart is 51 +/- 42 microJy. We would like to thank the WSRT staff for scheduling and obtaining these observations."
GCN 15858 table
GRB_name GRB140215A
GCN_number 15858
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15858 SUBJECT: GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow DATE: 14/02/18 15:48:45 GMT FROM: Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet A. LaCluyze, J. Haislip, D. Reichart, A. Trotter, S. Poshyachinda, W. Rujopakarn, A. Foster, N. Frank, K. Ivarsen, J. Moore, M. Nysewander, R. Beauchemin, T. Berger, M. Carroll, H. T. Cromartie, R. Egger, M. Hinckle, A. Ireland, M. Maples, L. Scott, and J. A. Crain report: Skynet continued observing the Swift-BAT localization of GRB 140215A (Markwardt et al., GCN 15837, Swift trigger 586680) with six of the PROMPT telescopes located at CTIO in Chile. LaCluyze et al. (GCN 15840) described rapid-response observations of a fading optical afterglow taken between ~1m and 6.5m after the burst in BVRI and luminance, and presented a preliminary light curve calibrated to USNOB and NOMAD catalog stars. A revised and recalibrated light curve, including observations taken at t~20-24h, is at: http://www.skynet.unc.edu/grb/grb140215a_2.png In stacks of ~45x160s images from the second night, we do not detect the afterglow with any degree of confidence (the I-band "detections" in the light curve plot are most likely spurious.) The 3-sigma limiting magnitudes are: Band tmid Limit I 21.9h >20.2 R 21.0h >20.5 V 21.8h >20.5 B 21.7h >20.3 Magnitudes are in the Vega system, and were calibrated to 4 APASS DR7 catalog stars in the field. They have not been corrected for line-of-sight MW dust extinction corresponding to E(B-V)=0.09 (Schlegel et al. 1998). No further Skynet observations are scheduled.
GCN 15861 table
GRB_name GRB140215A
GCN_number 15861
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15861 SUBJECT: GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval DATE: 14/02/19 15:35:54 GMT FROM: James Wren at LANL J. Wren, W.T. Vestrand, P. Wozniak, and H. Davis, of Los Alamos National Laboratory report: The RAPTOR network of robotic optical telescopes made follow-up observations of Swift trigger 586680 (Markwardt, et al., GCN 15837). Our narrow-field instruments in Los Alamos, NM, began imaging at 04:07:37.21 UT, 26.9 seconds after the BAT trigger time. We do not detect the counterpart in our three initial images, with limiting magnitudes near 14.0. The counterpart then rises above our detection limit and reaches peak brightness at magnitude 13.5 around T-Tbat=90s. The counterpart then plateaus for a period of about 50 seconds before beginning a power-law decay. Our unfiltered observations were calibrated to the USNO-B1 R-band. The following table summarizes some of our early observations. t-mid(s) exp(s) mag error ------------------------------------ 29.45 5 >14.0 56.85 5 13.8287 0.033 83.85 5 13.5381 0.011 128.95 10 13.5608 0.008 283.35 10 14.3725 0.024 470.75 30 14.9185 0.020