GRB140304A

This page lists all entries on GRB140304A in GRBweb

Summary Fermi GBM IPN Swift GCN 15914 GCN 15915 GCN 15916 GCN 15917 GCN 15918 GCN 15920 GCN 15921 GCN 15922 GCN 15923 GCN 15924 GCN 15925 GCN 15926 GCN 15927 GCN 15928 GCN 15930 GCN 15931 GCN 15932 GCN 15936 GCN 15937 GCN 15942

Summary table
Variable Value Source
GRB_name_Fermi GRB140304557
T0 13:22:26.106 UTC Fermi_GBM
ra 30.6428° Swift
decl 33.4738° Swift
pos_error 2.07e-04° Swift
T90 31.232 s Fermi_GBM
T90_error 8.719 s Fermi_GBM
T90_start 13:22:26.106 UTC Fermi_GBM
fluence 2.43e-06 erg/cm² Fermi_GBM
fluence_error 3.16e-08 erg/cm² Fermi_GBM
redshift 5.2830 GCN_circulars,Optical
T100 31.232 s
GBM_located False
mjd 56720.55724659722 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB140304557
trigger_name bn140304557
ra 30.6412°
decl 33.4744°
pos_error 8.00e+00°
datum 2014-03-04
t_trigger 13:22:31.482 UTC
T90 31.232 s
T90_error 8.719 s
T90_start 13:22:26.106 UTC
fluence 2.43e-06 erg/cm²
fluence_error 3.16e-08 erg/cm²
flux_1024 2.69e+00 erg/cm²/s
flux_1024_error 2.20e-01 erg/cm²/s
flux_1024_time 7.10e+00 erg/cm²/s
flux_64 4.15e+00 erg/cm²/s
flux_64_error 7.98e-01 erg/cm²/s
IPN table
GRB_name GRB140304A
ra 30.6667°
decl 33.4833°
pos_error 5.00e-02°
redshift 5.2830
Swift table
GRB_name GRB140304A
t_trigger 13:22:31 UTC
ra 30.6428°
decl 33.4738°
pos_error 2.07e-04°
T90 15.6 s
fluence 1.20e-06 erg/cm²
redshift 5.2830
GCN 15914 table
GRB_name GRB140304A
GCN_number 15914
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15914 SUBJECT: GRB 140304A: MASTER OT detecton DATE: 14/03/04 13:33:36 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, M. Pruzhinskaya, D.Denisenko, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB140304A 84 sec after trigger time at 2014-03-04 13:23:55.366 UT. On our first (10s exposure) set we found optical transient within SWIFT error-box (ra=02 02 38 dec=+33 29 24 r=0.050000) 02h 02m 34.13s , +33d 28m 26s.6 mag 16.5 The message may be cited.
GCN 15915 table
GRB_name GRB140304A
GCN_number 15915
Detection_method Swift Det
t_trigger 13:22:31 UTC
ra 30.6680°
decl 33.4850°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15915 SUBJECT: GRB 140304A: Swift detection of a burst DATE: 14/03/04 13:57:15 GMT FROM: David Palmer at LANL P. A. Evans (U Leicester), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), S. T. Holland (STScI), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC), A. Maselli (INAF-IASFPA), K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (AGU), M. H. Siegel (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team: At 13:22:31 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140304A (trigger=590206). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 30.668, +33.485 which is RA(J2000) = 02h 02m 40s Dec(J2000) = +33d 29' 07" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a total duration of about 20 sec. The peak count rate was ~3600 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 13:23:46.2 UT, 75.2 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source with an enhanced position: RA, Dec 30.6412, 33.4744 which is equivalent to: RA(J2000) = 02h 02m 33.90s Dec(J2000) = +33d 28' 27.9" with an uncertainty of 2.2 arcseconds (radius, 90% containment). This location is 89 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 5.98 x 10^20 cm^-2 (Kalberla et al. 2005). The initial flux in the 2.5 s image was 6.28e-10 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 250 seconds with the U filter starting 137 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image processing FAILED because of no aspect solution. Results from the list of sources generated on-board are not available at this time. No correction has been made for the expected extinction corresponding to E(B-V) of 0.08. This GRB will enter a Moon observing constraint around 20:00 UT and will not be observable again by Swift until March 6 (Thursday) around 05:30 UT. Burst Advocate for this burst is P. A. Evans (pae9 AT star.le.ac.uk). 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 15916 table
GRB_name GRB140304A
GCN_number 15916
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15916 SUBJECT: GRB 140304A: Afterglow decay from Nanshan observations DATE: 14/03/04 14:26:19 GMT FROM: Dong Xu at DARK/NBI D. Xu (DARK/NBI), H.-B. Niu, G.-J. Feng, T.-Z. Yang, A. Esamdin, L. Ma (XAO) report: We observed the field of GRB 140304A (Evans et al., GCN 15915) using the 1m telescope located in Nanshan, Xinjiang, China. Observations started at 13:43:26 UT on 2014-03-04 (i.e., 0.349 hr after the BAT trigger) and a series of 120s and 500s R-band images were obtained. In the first 120s R-band image, an optical source is clearly detected at the MASTER position (Gorbovskoy et al., GCN 15914), which is also consistent with the Swift/XRT position. We thus think this is the afterglow of the burst, and it has decayed to R=19.4+/-0.2 mag, calibrated with nearby SDSS stars. Observations are ongoing.
GCN 15917 table
GRB_name GRB140304A
GCN_number 15917
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15917 SUBJECT: GRB 140304A: Mondy optical observations DATE: 14/03/04 15:02:59 GMT FROM: Alexei Pozanenko at IKI, Moscow A.Volnova (IKI), A. Pozanenko (IKI), I. Korobtsev (ISTP), E. Klunko (ISTP), M. Eselevich (ISTP), report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 140304A (Evans et al., GCN 15915) with AZT-33IK telescope of Mondy observatory starting on Mar. 04 (UT) 13:54:10, i.e. ~0.5 hour after burst trigger. In the first images of 60 s exposure we clearly detected afterglow of GRB 140304A reported by Gorbovskoy et al. (GCN 15914) and Xu et al. (GCN 15916). Preliminary photometry of the fading afterglow is following: date UT start t-T0 Exp. Filter OT (mid, days) (s) 2014-03-04 13:54:10 0.02406 6*60 R 20.29 ± 0.17 The photometry is based on reference stars SDSS-DR9, (R mag, transformation by Lupton 2005): N SDSS_id R(Lupton) err J020233.12+332550.3 15.665 0.012 J020219.91+332738.5 14.785 0.012
GCN 15918 table
GRB_name GRB140304A
GCN_number 15918
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15918 SUBJECT: GRB 140304A: Khureltogot optical observations DATE: 14/03/04 15:17:16 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), N. Tungalag (Research Centre of Astronomy and Geophysics MAS), S. Schmalz (AIP), V. Voropaev (KIAM), I.Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the he field of GRB 140304A (Evans et al., GCN 15915) with ORI-40 telescope of Khureltogot observatory starting on Mar., 04 (UT)13:29:36, i.e., ~7 minutes after the GRB trigger. In the first unfiltered images of 60 s exposure we clearly detected afterglow of GRB 140304A reported by Gorbovskoy et al. (GCN 15914), Xu et al. (GCN 15916), and Volnova et al., (GCN 15917). Preliminary photometry of the fading afterglow is following: date UT start t-T0 Exp. Filter OT (mid, days) (s) 2014-03-04 13:29:36 0.00602 3*60 none 17.5 +/- 0.2 The photometry is based on reference stars SDSS-DR9, (R mag, transformation by Lupton 2005): N SDSS_id R(Lupton)err J020233.12+332550.3 15.665 0.012 J020219.91+332738.5 14.785 0.012
GCN 15920 table
GRB_name GRB140304A
GCN_number 15920
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15920 SUBJECT: GRB 140304A: Swift/UVOT Upper Limits DATE: 14/03/04 21:39:55 GMT FROM: Frank Marshall at GSFC F. E. Marshall (NASA/GSFC) and P. A. Evans (U. Leicester) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 140304A 138 s after the BAT trigger (Evans et al., GCN Circ. 15915). No optical afterglow consistent with the optical position (Gorbovskoy et al. GCN Circ. 15914) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag u_FC 138 388 246 >20.4 v 420 1561 165 >19.5 u 138 1519 529 >20.9 w1 469 1495 156 >19.7 m2 570 1470 117 >20.1 w2 396 1546 156 >20.0 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.08 in the direction of the burst (Schlegel et al. 1998). In view of the bright (16.5 mag) afterglow reported by Gorbovskoy et al., it is likely that the GRB has large intrinsic extinction or is at a redshift greater than about 3.5.
GCN 15921 table
GRB_name GRB140304A
GCN_number 15921
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15921 SUBJECT: GRB 140304A: NOT observations and redshift estimate DATE: 14/03/04 21:44:36 GMT FROM: Antonio de Ugarte Postigo at IAA-CSIC A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), J. Gorosabel (EHU-UPV, IAA-CSIC), D. Xu (DARK/NBI), D. Malesani (DARK/NBI), A. Somero (NOT), B. Milvang-Jensen (DARK/NBI), M.I. Andersen (DARK/NBI), P. Jakobsson (U. Iceland) and J.P.U. Fynbo (DARK/NBI) report on behalf of a larger collaboration: We have observed the afterglow of 140304A (Gorbovskoy et al. GCN 15914, Evans et al. GCN 15915) with the Nordic Optical Telescope (NOT) equipped with ALFOSC. Observations started at 20:19 UT on March 4 (i.e., 6.95 hr after the burst) in r and g-bands. The afterglow is clearly detected in r-band at 20.5 mag, but undetected in g-band down to a 3-sigma limit of 21.5, pointing towards a high-redshift event at z ~ 5 if the Lyman break is between g and r-band. Further observations are ongoing.
GCN 15922 table
GRB_name GRB140304A
GCN_number 15922
Detection_method Optical
redshift 5.3900
Circular_text TITLE: GCN CIRCULAR NUMBER: 15922 SUBJECT: GRB 140304A: 10.4m GTC redshift z = 5.39 DATE: 14/03/04 22:01:48 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia S. Jeong, R. Snchez-Ramrez (IAA-CSIC), A. J. Castro-Tirado (IAA-CSIC, UMA), J. Gorosabel (EHU-UPV, IAA-CSIC), M. Jelinek, J. C. Tello, P. Ferrero, O. Lara-Gil, R. Cunniffe (IAA-CSIC), D. Prez-Ramrez (U. Jan), S. Guziy (Nikolaev Univ.), J. M. Castro Cern (ESAC), A. Fernndez-Soto (UV), J. Cepa (IAC), M. A. Rivero and G. Gmez-Velarde (GTC), on behalf of a larger collaboration, report: Following the detection of the optical afterglow (Gorbovskoy et al. GCNC 15914) to GRB 140304A (Evans et al. GCNC 15915), we have obtained an optical spectrum with the 10.4 m GTC (+OSIRIS) starting aprox. 8.2 hr postburst, covering the 5700-10000 wavelength range. The continuum is detected only redwards of aprox. 7750 A, with several absorption metallic lines (N V, Si II and Si IV amongst others) at a common redshift of z = 5.39 which we propose to be the redshift of GRB 140304A. This is consistent with the Swift/UVOT upper limits (Marshall et al. GCNC 15920) and the NOT optical observation (de Ugarte Postigo et al. GCNC 15921). [GCN OPS NOTE(04mar14): Per author's request, the "5.XX" was replaced with 5.39.]
GCN 15923 table
GRB_name GRB140304A
GCN_number 15923
Detection_method Fermi GBM Det
t_trigger 13:22:31.480 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 15923 SUBJECT: GRB 140304A: Fermi GBM detection DATE: 14/03/04 22:27:39 GMT FROM: Peter Jenke at MSFC P. Jenke (UAH) and G. Fitzpatrick (UCD) reports on behalf of the Fermi GBM Team: "At 13:22:31.48 UT on March 4 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140304A (trigger 415632154/140304577), which was also detected by Swift (P. A. Evans et al. 2014, GCN 15915). The GBM on-ground location, using the Fermi GBM trigger data, is consistent with the Swift/XRT location. The angle of the burst direction to the Fermi LAT boresight is 80 degrees. The GBM light curve consists of two main peaks with a combined duration (T90) of 32 +/- 6 s (50-300 keV). The time-averaged spectrum from T0-5 s to T0+14 s is well fit by a power law function with an exponential high energy cutoff. The power law index is -1.1 +/- 0.1 and the high energy cutoff, parameterized as EPeak, is 185 +/- 35 keV. The event fluence (10-1000 keV) in this time interval is (2.6 +/- 0.2)E-06 erg/cm^2. The 1.0-sec peak photon flux measured starting from T0+7.2 s in the 10-1000 keV band is 2.5 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 15924 table
GRB_name GRB140304A
GCN_number 15924
Detection_method Other
redshift 5.3350
Circular_text TITLE: GCN CIRCULAR NUMBER: 15924 SUBJECT: GRB 140304A: Redshift from the NOT DATE: 14/03/05 00:41:12 GMT FROM: Antonio de Ugarte Postigo at IAA-CSIC A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), D. Xu (DARK/NBI), J. Gorosabel (EHU-UPV, IAA-CSIC), D. Malesani (DARK/NBI), B. Milvang-Jensen (DARK/NBI), M.I. Andersen (DARK/NBI), P. Jakobsson (U. Iceland), J.P.U. Fynbo (DARK/NBI), and A. Somero (Tuorla Obs.) report on behalf of a larger collaboration: Following the photometry reported in GCN 15921, we have performed spectroscopy of GRB 140304A (Gorbovskoy et al. GCN 15914, Evans et al. GCN 15915) with the Nordic Optical Telescope (NOT) equipped with ALFOSC. The observation began at 21:20 UT (7.97 hr after the burst) and consisted of a single 1500 s exposure covering the range between 3200 and 9100 A. We detect continuum emission with a deep absorption consistent with a DLA at a redshift of 5.28+/-0.02, as well as emission down to ~5800 A, which is consistent with the Ly-limit at a similar redshift. Despite the lack of metal features identified in our spectrum, a redshift of z=5.39 as reported by Jeong et al. (GCN 15922) is inconsistent with our data.
GCN 15925 table
GRB_name GRB140304A
GCN_number 15925
Detection_method Swift-XRT Det
ra 30.6427°
decl 33.4738°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15925 SUBJECT: GRB 140304A: Enhanced Swift-XRT position DATE: 14/03/05 00:43:34 GMT FROM: Phil Evans at U of Leicester A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team. Using 3335 s of XRT Photon Counting mode data and 5 UVOT images for GRB 140304A, 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 = 30.64267, +33.47384 which is equivalent to: RA (J2000): 02h 02m 34.24s Dec (J2000): +33d 28' 25.8" with an uncertainty of 1.6 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 15926 table
GRB_name GRB140304A
GCN_number 15926
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15926 SUBJECT: GRB 140304A: Swift-XRT refined Analysis DATE: 14/03/05 02:57:04 GMT FROM: Phil Evans at U of Leicester K.L. Page (U. Leicester), C. Pagani (U. Leicester), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), J.A. Kennea (PSU), V. Mangano (PSU), M.C. Stroh (PSU), A.P. Beardmore (U. Leicester) and P.A. Evans report on behalf of the Swift-XRT team: We have analysed 6.4 ks of XRT data for GRB 140304A (Evans et al. GCN Circ. 15915), from 81 s to 23.1 ks after the BAT trigger. The data comprise 42 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN Circ. 15925). The late-time light curve (from T0+5.2 ks) is consistent with a constant source of mean count rate 1.1e+00 ct/sec. A power-law fit gives an index of 0.2 (+/-0.7). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.00 (+0.15, -0.14). The best-fitting absorption column is 9.8 (+3.4, -3.1) x 10^20 cm^-2, in excess of the Galactic value of 6.0 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (4.6 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 9.8 (+3.4, -3.1) x 10^20 cm^-2 Galactic foreground: 6.0 x 10^20 cm^-2 Excess significance: 2.0 sigma Photon index: 2.00 (+0.15, -0.14) If the light curve continues to decay with a power-law decay index of 0.2, the count rate at T+24 hours will be 0.024 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 8.7 x 10^-13 (1.1 x 10^-12) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00590206. This circular is an official product of the Swift-XRT team.
GCN 15927 table
GRB_name GRB140304A
GCN_number 15927
Detection_method Swift-BAT Det
ra 30.6530°
decl 33.4800°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15927 SUBJECT: GRB 140304A: Swift-BAT refined analysis DATE: 14/03/05 04:14:02 GMT FROM: Scott Barthelmy at NASA/GSFC W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), P. A. Evans (U Leicester), 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-61 to T+242 sec from recent telemetry downlinks, we report further analysis of BAT GRB 140304A (trigger #590206) (Evans, et al., GCN Circ. 15915). The BAT ground-calculated position is RA, Dec = 30.653, 33.480 deg, which is RA(J2000) = 02h 02m 36.8s Dec(J2000) = +33d 28' 47.4" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 74%. The mask-weighted light curve shows several overlapping peaks starting at ~T-10 sec, peaking at ~T+10 sec, and ending at ~T+30 sec. T90 (15-350 keV) is 15.6 +- 1.9 sec (estimated error including systematics). The time-averaged spectrum from T-3.94 to T+15.77 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.29 +- 0.08. The fluence in the 15-150 keV band is 1.2 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+10.22 sec in the 15-150 keV band is 1.7 +- 0.2 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/590206/BA/
GCN 15928 table
GRB_name GRB140304A
GCN_number 15928
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15928 SUBJECT: GRB 140304A: RATIR g-band Dropout DATE: 14/03/05 04:59:08 GMT FROM: Nat Butler at UC berkeley 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 140304A (Evans, et al., GCN 15915) 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 2014/03 5.12 to 2014/03 5.16 UTC (13.50 to 14.40 hours after the BAT trigger), obtaining a total of 0.26 hours exposure in the g and r bands, 0.53 hours exposure in the i band, and 0.30 hours exposure in the Z, Y, J, and H bands. For a source within the Swift-XRT error circle (Evans, et al., GCN 15925), in comparison with the SDSS DR9 and 2MASS, we obtain the following detections and 3-sigma upper limit: g > 23.07 r 21.78 +/- 0.13 i 20.66 +/- 0.06 Z 19.45 +/- 0.05 Y 19.19 +/- 0.06 J 19.11 +/- 0.07 H 18.71 +/- 0.08 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. Using the procedure outlined in Littlejohns et al. 2013 (arXiv:1312.3967), we derive a photometric redshift z_phot = 5.45 (-0.2,+0.1; 90% confidence). This photometric redshift is consistent with the one reported by de Ugarte-Postigo et al. (GCN 15921) and the spectroscopic redshift determinations by Jeong et al. (GCN 15922) and de Ugarte-Postigo et al. (GCN 15924). We thank the staff of the Observatorio Astronmico Nacional in San Pedro Mrtir.
GCN 15930 table
GRB_name GRB140304A
GCN_number 15930
Detection_method VLA Det
ra 30.6424°
decl 33.4739°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15930 SUBJECT: GRB 140304A: VLA Detection DATE: 14/03/05 17:10:53 GMT FROM: Tanmoy Laskar at Harvard U T. Laskar, A. Zauderer, and E. Berger (Harvard) report: "We observed the position of GRB 140304A (Evans et al; GCN 15915) with the VLA beginning on 2014 May 5.01 UT (0.45 days after the burst). At a mean frequency of 6 GHz, we detect a radio source with a preliminary flux density of ~ 0.05 mJy at RA = 02:02:34.173 +/- 0.001 Dec = 33:28:26.01 +/- 0.02 consistent with the enhanced Swft/XRT position (Beardmore et al.; GCN 15925) and the optical position (Gorbovskoy et al.; GCN 15914). Follow-up observations are planned."
GCN 15931 table
GRB_name GRB140304A
GCN_number 15931
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15931 SUBJECT: GRB 140304A: CARMA 3mm detection DATE: 14/03/05 17:28:20 GMT FROM: Ashley Zauderer at CfA B. A. Zauderer, T. Laskar, and E. Berger (Harvard) report on behalf of the CARMA Key Project "A Millimeter View of the Transient Universe": "We observed the position of GRB 140304A (Evans et al., GCN 15915) with the Combined Array for Research in Millimeter Astronomy (CARMA) beginning 2014 Mar 5.01 UT (10.8 hours post-burst) at a mean frequency of ~85 GHz. We detect a radio source with a flux of ~0.5 mJy consistent with the enhanced Swift-XRT position (Beardmore et al., GCN 15925), the optical afterglow localization (Gorbovskoy et al., GCN 15914), and our VLA 5.8 GHz position (Laskar et al., GCN 15930). Follow-up observations are in progress. We thank the CARMA staff and observers, Shaye Storm and Robin Dong, for their support of these rapid-response observations."
GCN 15932 table
GRB_name GRB140304A
GCN_number 15932
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15932 SUBJECT: GRB 140304A: MASTER OT light curve DATE: 14/03/05 18:41:37 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, M. Pruzhinskaya, D.Denisenko, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB140304A (Evans et. al GCN 15915) 26 sec after notice time and 77 sec after trigger time at 2014-03-04 13:23:49 UT. We detect OT (Gorbovskoy et. al GCN 15914) in two polarization bands during ~1 h while the source was brighter than our upper limit. The preliminary photometry result available in table 1 and here http://master.sai.msu.ru/static/GRB/grb140304A.png . Table 1. Preliminary early GRB140304A observations. T_start(JD) T_trig-T_mid Exptime Mag1 Mag2 Coadd 2456721.05834 82 10 16.8 16.2 - 2456721.05931 172 30 17.2 16.9 - 2456721.06073 294 50 18.0 17.6 - 2456721.06142 358 120 18.1 17.6 2 2456721.06211 413 70 18.3 18.0 - 2456721.06724 894 580 18.5 18.5 4 2456721.08121 2070 1080 19.6 19.0 6 2456721.09812 3526 1080 19.9 19.4 6 Mag1 and Mag2 - Magnitude in two perpendicular polarizations. The power low index alpha is 0.77+-0.05 (F ~ t-apha). MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB140304A 5 sec after notice time and 46 sec after trigger time at 2014-03-04 13:23:17 UT. The observations on this site made on bad weather conditions and on high zenith distance. The 5-sigma upper limit On our first (10s exposure) image has been about 13.0 mag. The message may be cited.
GCN 15936 table
GRB_name GRB140304A
GCN_number 15936
Detection_method Optical
redshift 5.2830
Circular_text TITLE: GCN CIRCULAR NUMBER: 15936 SUBJECT: GRB 140304A: 10.4m GTC refined redshift z = 5.283 DATE: 14/03/06 16:12:38 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia S. Jeong, R. Snchez-Ramrez (IAA-CSIC), J. Gorosabel (EHU-UPV, IAA-CSIC) and A. J. Castro-Tirado (IAA-CSIC, UMA), on behalf of a larger collaboration, report: Once the calibration data have been available we have reduced again the optical spectrum taken with the 10.4 m GTC (+OSIRIS) starting aprox. 8.2 hr postburst. At the host galaxy location for GRB 140304A, we find a damped Ly-alpha system with log N(H) ~ 21.6 and z = 5.283. We also get the same redshift from its metal lines that we interpret as SII, SiII, SiII*, CII, CII*, SiIV and FeII. This value supersedes the preliminary measurement given in GCNC 15922 (Jeong et al.) and is consistent the one reported in GCNC 15924 (de Ugarte Postigo et al.).
GCN 15937 table
GRB_name GRB140304A
GCN_number 15937
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15937 SUBJECT: GRB 140304A: Continued RATIR Optical and NIR Observations DATE: 14/03/06 16:57:05 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 140304A (Evans, et al., GCN 15915) 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 2014/03 6.12 to 2014/03 6.14 UTC (37.55 to 38.08 hours after the BAT trigger), obtaining 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-XRT error circle, in comparison with the SDSS DR9 and 2MASS, we obtain the following detection and upper limits (3-sigma): r > 22.77 i > 22.60 Z 20.88 +/- 0.20 Y > 20.96 J > 20.65 H > 20.31 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. In the Z-band, the source has faded as a powerlaw t^(-1.3) relative to our observations conducted last night (Butler et al., GCN 15928). We thank the staff of the Observatorio Astronmico Nacional in San Pedro Mrtir.
GCN 15942 table
GRB_name GRB140304A
GCN_number 15942
Detection_method Suzaku WAM Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 15942 SUBJECT: GRB 140304A: Suzaku WAM observation of the prompt emission DATE: 14/03/10 07:14:31 GMT FROM: Kazutaka Yamaoka at Nagoya U W. Iwakiri (RIKEN), M. Tashiro, Y. Terada, T. Yasuda, Y. Ishida, H. Ueno, S. Sugimoto, S. Koyama, S. Takeda, T. Nagayoshi (Saitama U.), M. Yamauchi, N. Ohmori, M. Akiyama, R. Kinoshita (Univ. of Miyazaki), M. Ohno, K. Takaki, T. Kawano, R. Nakamura, S. Furui, Y. Fukazawa (Hiroshima U.), K. Yamaoka (Nagoya U.), S. Sugita (Ehime U.), Y. E. Nakagawa, M. Kokubun, T. Takahashi (ISAS/JAXA), Y. Hanabata (ICRR), Y. Urata (NCU), K. Nakazawa, K. Makishima (Univ. of Tokyo) on behalf of the Suzaku WAM team, report: The long GRB 140304A (Swift/BAT trigger #590206 ; Evans et al., GCN 15915; Fermi-GBM detection: Jenke and Fitzpatrick, GCN 15923) was detected by the the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 13:22:33 UT (=T0). The observed light curve shows a multi-peaked structure lasting from T0-3 s to T0+11 s with a duration (T90) of about 12 seconds. The fluence in 100 - 1000 keV was 1.69 (+0.32/-0.34) x10^-6 erg/cm^2. The 1-s peak flux measured from T0-1 s was 0.48 (+0.28, -0.23) photons/cm^2/s in the same energy range. Preliminary result shows that the time-averaged spectrum from T0-3 s to T0+11 s is well fitted by a single power-law with a photon index of 2.09 (+0.66/-0.38) (chi^2/d.o.f = 12.3/14). All the quoted errors are at statistical 90% confidence level, in which the systematic uncertainties are not included. The light curves with 1-sec time resolution for this burst are available at: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/untrig/grb_table.html