GRB140614A

This page lists all entries on GRB140614A in GRBweb

Summary IPN Swift GCN 16391 GCN 16392 GCN 16393 GCN 16396 GCN 16397 GCN 16401 GCN 16402

Summary table
Variable Value Source
T0 1:04:59 UTC GCN_circulars,Swift Det
ra 231.1691° Swift
decl -79.1288° Swift
pos_error 1.81e-04° Swift
T90 720.0 s Swift
T90_start 1:04:59 UTC Swift
fluence 1.30e-06 erg/cm² Swift
redshift 4.2330 GCN_circulars,Optical
T100 720.0 s
GBM_located False
mjd 56822.045127314814 GCN_circulars,Swift Det
IPN table
GRB_name GRB140614A
ra 231.2333°
decl -79.1000°
pos_error 5.00e-02°
redshift 4.2330
Swift table
GRB_name GRB140614A
t_trigger 1:04:59 UTC
ra 231.1691°
decl -79.1288°
pos_error 1.81e-04°
T90 720.0 s
fluence 1.30e-06 erg/cm²
redshift 4.2330
GCN 16391 table
GRB_name GRB140614A
GCN_number 16391
Detection_method Swift Det
t_trigger 1:04:59 UTC
ra 231.2320°
decl -79.0950°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16391 SUBJECT: GRB 140614A: Swift detection of a burst DATE: 14/06/14 01:20:49 GMT FROM: David Palmer at LANL K. L. Page (U Leicester), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), F. E. Marshall (NASA/GSFC), T. Sakamoto (AGU), M. H. Siegel (PSU) and C. A. Swenson (PSU) report on behalf of the Swift Team: At 01:04:59 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140614A (trigger=601646). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 231.232, -79.095 which is RA(J2000) = 15h 24m 56s Dec(J2000) = -79d 05' 41" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is usual for an image trigger, the immediately-available light curve does not show significant variation. The XRT began observing the field at 01:07:03.1 UT, 123.2 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 231.1723, -79.1291 which is equivalent to: RA(J2000) = 15h 24m 41.34s Dec(J2000) = -79d 07' 44.9" with an uncertainty of 2.2 arcseconds (radius, 90% containment). This location is 129 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 1.26 x 10^21 cm^-2 (Willingale et al. 2013). The initial flux in the 2.5 s image was 7.34e-10 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 150 seconds with the White filter starting 131 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers none of the XRT error circle. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.12. Burst Advocate for this burst is K. L. Page (kpa 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 16392 table
GRB_name GRB140614A
GCN_number 16392
Detection_method Other
ra 231.1694°
decl -79.1287°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16392 SUBJECT: GRB 140614A: GROND afterglow candidate DATE: 14/06/14 02:49:55 GMT FROM: Sylvio Klose at TLS Tautenburg M. Tanga (MPE Garching), T. Kruehler (ESO, Santiago), S. Klose, D. A. Kann (both TLS Tautenburg), and J. Greiner (MPE Garching) report: We observed the field of GRB 140614A (Swift trigger 601646; Page et al., GCN 16391) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPG telescope at ESO La Silla Observatory (Chile). Observations started at 01:09:27 UT on June 14, about 5 min after the GRB trigger. They were obtained at airmass 1.5 and a seeing of 2". Inside the X-ray error circle we detect a source at coordinates RA, DEC (J2000) = 15:24:40.65, -79:07:43.5 with an error of 0".5. At a mean time of 01:40:20 UT, we measure the following preliminary AB magnitudes: g' > 21.6, r' = 20.6 +/- 0.2, i' = 19.5 +/- 0.1, z' = 19.2 +/- 0.1, J = 19.0 +/- 0.2, H = 18.5 +/- 0.2, and K > 17.6. We also detect clear fading in the J band. We propose this source to be the afterglow of GRB 140614A. Given magnitudes are calibrated against GROND zeropoints (g'r'i'z') as well as 2MASS (JHK) field stars and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E(B-V) = 0.12 mag in the direction of the burst (Schlegel et al. 1998).
GCN 16393 table
GRB_name GRB140614A
GCN_number 16393
Detection_method Swift-XRT Det
ra 231.1695°
decl -79.1288°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16393 SUBJECT: GRB 140614A: Enhanced Swift-XRT position DATE: 14/06/14 05:24:14 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 1478 s of XRT Photon Counting mode data and 1 UVOT images for GRB 140614A, 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 = 231.16955, -79.12882 which is equivalent to: RA (J2000): 15h 24m 40.69s Dec (J2000): -79d 07' 43.8" with an uncertainty of 1.8 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 16396 table
GRB_name GRB140614A
GCN_number 16396
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 16396 SUBJECT: GRB 140614A: Swift-XRT refined Analysis DATE: 14/06/14 13:21:02 GMT FROM: Phil Evans at U of Leicester A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), J.A. Kennea (PSU), V. Mangano (PSU), M.C. Stroh (PSU), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), P. D'Avanzo (INAF-OAB) and K.L. Page report on behalf of the Swift-XRT team: We have analysed 7.7 ks of XRT data for GRB 140614A (Page et al. GCN Circ. 16391), from 112 s to 19.0 ks after the BAT trigger. The data comprise 141 s in Windowed Timing (WT) mode (the first 10 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN Circ. 16393). The light curve can be modelled with an initial power-law decay with an index of alpha=1.75 (+0.11, -0.09), followed by a break at T+948 s to an alpha of 0.96 (+0.07, -0.09). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.73 (+0.14, -0.12). The best-fitting absorption column is 1.45 (+0.53, -0.19) x 10^21 cm^-2, consistent with the Galactic value of 1.3 x 10^21 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.78 (+0.11, -0.09) and a best-fitting absorption column consistent with the Galactic value. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.8 x 10^-11 (4.3 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 1.26 (+0.23, -0.00) x 10^21 cm^-2 Galactic foreground: 1.3 x 10^21 cm^-2 Excess significance: <1.6 sigma Photon index: 1.78 (+0.11, -0.09) If the light curve continues to decay with a power-law decay index of 0.96, the count rate at T+24 hours will be 7.8 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.0 x 10^-13 (3.4 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/00601646. This circular is an official product of the Swift-XRT team.
GCN 16397 table
GRB_name GRB140614A
GCN_number 16397
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 16397 SUBJECT: GRB 140614A: Swift/UVOT Upper Limits DATE: 14/06/14 14:11:43 GMT FROM: Paul Kuin at MSSL N. P. M. Kuin (UCL-MSSL) and K. L. Page (U Leicester) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 140614A 132 s after the BAT trigger (Page et al., GCN Circ. 16391). No optical afterglow consistent with the XRT position (Beardmore et al. GCN Circ. 16393) 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 white_FC 132 281 147 >21.5 u_FC 290 539 246 >20.5 white 132 763 186 >21.6 v 620 1668 39 >19.1 b 546 739 39 >19.6 u 290 714 265 >20.5 w1 670 1718 39 >19.1 m2 645 1693 39 >18.9 w2 596 783 34 >20.4 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.12 in the direction of the burst (Schlegel et al. 1998).
GCN 16401 table
GRB_name GRB140614A
GCN_number 16401
Detection_method Optical
redshift 4.2330
Circular_text TITLE: GCN CIRCULAR NUMBER: 16401 SUBJECT: GRB 140614A: X-shooter redshift DATE: 14/06/14 15:39:49 GMT FROM: Paul Vreeswijk at Weizmann Inst of Science T. Kruehler (ESO, Santiago), P. M. Vreeswijk (Weizmann), J. P. U. Fynbo, D. Xu (DARK/NBI) report on behalf of the X-shooter GRB collaboration: We observed the optical afterglow (Tanga et al., GCN 16392) of GRB 140614A (Swift trigger 601646; Page et al., GCN 16391; Beardmore et al., GCN 16393; Melandri et al., GCN 16396) with the VLT/X-shooter spectrograph, equipped with the UVB/VIS/NIR arms and covering the wavelength range 3000-25000 AA. A spectral nodding sequence of 4x600s was started at June 14.20 (3.8 hours after the Swift trigger). A preliminary reduction shows the lack of any signal in the UVB arm, but a clear trace, albeit with moderate signal-to-noise ratio, in both the VIS and NIR arms starting at around 6450 AA. Several absorption features can be identified with the transitions SiII 1526, CII 1334, CII* 1335, AlII 1670, AllIII 1854, FeII 2344, 2382, 2600, and MgII 2796, 2803 at a common redshift of z=4.233. We acknowledge excellent support from the observing staff at Paranal, in particular Zahed Wahhaj, Jonathan Smoker, Yazan Momany and Stephane Brillant.
GCN 16402 table
GRB_name GRB140614A
GCN_number 16402
Detection_method Swift-BAT Det
ra 231.1710°
decl -79.1100°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16402 SUBJECT: GRB 140614A: Swift-BAT refined analysis DATE: 14/06/14 16:27:03 GMT FROM: Scott Barthelmy at NASA/GSFC C. B. Markwardt (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), K. L. Page (U Leicester), 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-239 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 140614A (trigger #601646) (Page, et al., GCN Circ. 16391). The BAT ground-calculated position is RA, Dec = 231.171, -79.110 deg, which is RA(J2000) = 15h 24m 41.1s Dec(J2000) = -79d 06' 36.9" with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 97%. The mask-weighted light curvea shows a broad peak starting at ~T-80 sec, peaking at ~T+55 sec, and returning to baseline at ~T+200 sec (and possibly out to around T+600 sec). The formal T90 (15-350 keV) is 720 +- 160 sec, but with the long weak possible tail of this event it is hard to determine the true end of the event (estimated error including systematics). The time-averaged spectrum from T+0.51 to T+957 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.50 +- 0.46. The fluence in the 15-150 keV band is 1.3 +- 0.4 x 10^-6 erg/cm2. 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/601646/BA/