GRB141109A

This page lists all entries on GRB141109A in GRBweb

Summary IPN Swift GCN 17037 GCN 17039 GCN 17040 GCN 17041 GCN 17042 GCN 17043 GCN 17044 GCN 17048 GCN 17049 GCN 17053 GCN 17055 GCN 17056 GCN 17057 GCN 17059 GCN 17062 GCN 17063 GCN 17070 GCN 17072

Summary table
Variable Value Source
T0 5:49:55 UTC GCN_circulars,Swift Det
ra 144.5308° Swift
decl -0.6079° Swift
pos_error 1.81e-04° Swift
T90 200.0 s Swift
T90_start 5:49:55 UTC Swift
fluence 6.80e-06 erg/cm² Swift
redshift 2.9930 Swift
T100 200.0 s
GBM_located False
mjd 56970.242997685185 GCN_circulars,Swift Det
IPN table
GRB_name GRB141109A
ra 144.5083°
decl -0.6000°
pos_error 5.00e-02°
redshift 2.9930
Swift table
GRB_name GRB141109A
t_trigger 5:49:55 UTC
ra 144.5308°
decl -0.6079°
pos_error 1.81e-04°
T90 200.0 s
fluence 6.80e-06 erg/cm²
redshift 2.9930
GCN 17037 table
GRB_name GRB141109A
GCN_number 17037
Detection_method Swift Det
t_trigger 5:49:55 UTC
ra 144.5070°
decl -0.6020°
Circular_text TITLE: GCN CIRCULAR NUMBER: 17037 SUBJECT: GRB 141109A: Swift detection of a burst DATE: 14/11/09 06:05:41 GMT FROM: Scott Barthelmy at NASA/GSFC P. D'Avanzo (INAF-OAB), S. D. Barthelmy (GSFC), M. G. Bernardini (INAF-OAB), M. M. Chester (PSU), A. Melandri (INAF-OAB), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Swift Team: At 05:49:55 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 141109A (trigger=618024). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 144.507, -0.602, which is RA(J2000) = 09h 38m 02s Dec(J2000) = -00d 36' 04" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a multi-peak structure with a duration of at least 170 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~118 sec after the trigger. The XRT began observing the field at 05:52:04.3 UT, 129.2 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 144.5334, -0.6093 which is equivalent to: RA(J2000) = +09h 38m 8.02s Dec(J2000) = -00d 36' 33.5" with an uncertainty of 6.5 arcseconds (radius, 90% containment). This location is 98 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 0.1 s image was 1.18e-08 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 150 seconds with the White filter starting 139 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 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. 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 0.04. Burst Advocate for this burst is P. D'Avanzo (paolo.davanzo AT brera.inaf.it). 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 17039 table
GRB_name GRB141109A
GCN_number 17039
Detection_method Optical
ra 144.5292°
decl -0.6084°
Circular_text TITLE: GCN CIRCULAR NUMBER: 17039 SUBJECT: GRB 141109A: REM NIR candidate afterglow DATE: 14/11/09 09:56:07 GMT FROM: Stefano Covino at Brera Astronomical Observatory S. Covino (INAF/OAB) on behalf of the REM team: We observed the field of the GRB141109A (D'Avanzo et al., GCN 17037) simultaneously in the optical and near infrared with the the 60-cm robotic telescope REM at La Silla Observatory (Chile). The observations started at 05:52:08 UT, about 2 min after the GRB, when the source was less than 10deg from the local horizon. A candidate afterglow in the XRT error box is detected at the coordinates: RA(J2000) = 09:38:07:40 DEC(J2000) = -00:36:30.13 A very preliminary photometry indicates it was H~15.7 about 35 min after the burst. [GCN OPS NOTE(09nov14): Per author's request, "REM was added tot he Subject-line.]
GCN 17040 table
GRB_name GRB141109A
GCN_number 17040
Detection_method Optical
ra 144.5310°
decl -0.6083°
redshift 3.0000
Circular_text TITLE: GCN CIRCULAR NUMBER: 17040 SUBJECT: X-shooter redshift of GRB 141109A DATE: 14/11/09 10:43:29 GMT FROM: Paul Vreeswijk at Weizmann Inst of Science D. Xu (DARK/NBI), P. M. Vreeswijk (Weizmann), J. P. U. Fynbo (DARK/NBI), V. D'Elia (ASI/ASDC and INAF/Roma), K. Wiersema, N. R. Tanvir (Univ. Leicester), A. de Ugarte Postigo (IAA-CSIC), S. Covino (INAF/OAB) report on behalf of a larger collaboration: We observed the optical afterglow of the Swift GRB 141109A (D'Avanzo et al., GCN 17037), using the X-shooter spectrograph at ESO's VLT. Observations started at 07:45 UT on 2014 Nov 9 (1.9 hr after the GRB), and consisted of 2x1200 s exposures in each of the UVB, VIS, and NIR arms, covering the wavelength range 3000-20,000 AA. In the acquisition image, we detect a point source, which is not detected in the SDSS, at the position (J2000): RA = 09:38:07.44 Dec = -00:36:29.9 with an uncertainty of about 0.5". This position is consistent with that of the NIR afterglow reported by Covino et al. (GCN 17039). We measure a (preliminary) magnitude of R=19.2+-0.1 (Vega). We detect a variety of absorption features throughout the entire spectrum. In particular, a wide trough is visible centered around 4800 AA, which we interpret as due to H I absorption at redshift z~3. Identification of several metal features as due to, among others, Si II, C II, Fe II, C IV, SiIV, allows us to refine the value to z=2.993. The presence of several fine structure lines of Fe II, Si II, O I, Ni II and C II confirms this is the redshift of the GRB. We note the presence of two strong intervening system at z ~ 1.67 and z ~ 2.5 (detected in Mg II). We acknowledge excellent support from the ESO observing staff at Paranal, in particular Valentin Ivanov and Marcelo Lopez. We also thank the visiting astronomer Simone Zaglia from the ESO-GAIA survey, who made these observation possible.
GCN 17041 table
GRB_name GRB141109A
GCN_number 17041
Detection_method GROND
Circular_text TITLE: GCN CIRCULAR NUMBER: 17041 SUBJECT: GRB 141109A: GROND afterglow observation DATE: 14/11/09 12:04:14 GMT FROM: Sebastian Schmidl at TLS Tautenburg J. Graham (MPE Garching), S. Schmidl (TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team: We observed the field of GRB 141109A (Swift trigger 618024; P. D'Avanzo et al., GCN 17037) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile). Observations started at 06:51 UT on November 09, 2014, approximately 1 hour after the GRB trigger. They were performed at an average seeing of 1.7" and at an average airmass of 1.6. We detect the optical/NIR aftergow reported by Covino et al. (GCN 17039) and Xu et al. (GCN 17040). Based on total exposures of 25.0 minutes in g'r'i'z' and 20.0 minutes in JHK, at a midtime of 2.3 hrs after the burst, we measure the following preliminary magnitudes (AB magnitude system): g' = 20.7 +/- 0.1 mag, r' = 19.7 +/- 0.1 mag, i' = 19.4 +/- 0.1 mag, z' = 19.2 +/- 0.1 mag, J = 19.0 +/- 0.1 mag, H = 18.8 +/- 0.1 mag, and K = 18.5 +/- 0.1 mag. The magnitudes are calibrated against SDSS and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V)= 0.04 in the direction of the burst (Schlegel et al. 1998).
GCN 17042 table
GRB_name GRB141109A
GCN_number 17042
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 17042 SUBJECT: GRB 141109A: CQUEAN Detection at 0.85 - 1.05 micron DATE: 14/11/09 14:01:05 GMT FROM: Myungshin Im at Seoul Nat U Myungshin Im, Yongjung Kim, Minhee Hyun (CEOU/SNU), Woojin Park, and Soojong Pak (Kyunghee Univ.) We observed the field of GRB 141109A (D'Avanzo et al. GCN 17037), using CQEUAN (Park et al. 2012) on the 2.1-m Otto-Struve telescope at the McDonald Observatory in Texas, US. The observation started at 2014-11-09 10:47:05 UT, or about 5 hrs after the BAT alert. A series of images were taken with medium-band filters centered at 0.875, 0.925, 0.975, and 1.025 micron. We identify the optical/NIR counterpart reported in Covino et al. (GCN 17039), Xu et al. (GCN 17040), and Graham et al. (GCN 17041), in all of the medium-band images. A preliminary magnitude at 0.875 micron is 20.2 +- 0.1 AB mag. Further analysis of the data is ongoing.
GCN 17043 table
GRB_name GRB141109A
GCN_number 17043
Detection_method Swift-XRT Det
ra 144.5308°
decl -0.6079°
Circular_text TITLE: GCN CIRCULAR NUMBER: 17043 SUBJECT: GRB 141109A: Enhanced Swift-XRT position DATE: 14/11/09 14:35:35 GMT FROM: Phil Evans at U of Leicester J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team. Using 1173 s of XRT Photon Counting mode data and 3 UVOT images for GRB 141109A, 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 = 144.53083, -0.60795 which is equivalent to: RA (J2000): 09h 38m 7.40s Dec (J2000): -00d 36' 28.6" 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 17044 table
GRB_name GRB141109A
GCN_number 17044
Detection_method Swift-BAT Det
ra 144.5630°
decl -0.5810°
Circular_text TITLE: GCN CIRCULAR NUMBER: 17044 SUBJECT: GRB 141109A: Swift-BAT refined analysis DATE: 14/11/09 18:02:52 GMT FROM: Scott Barthelmy at NASA/GSFC W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), P. D'Avanzo (INAF-OAB), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (LANL) (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 141109A (trigger #618024) (D'Avanzo, et al., GCN Circ. 17037). The BAT ground-calculated position is RA, Dec = 144.563, -0.581 deg, which is RA(J2000) = 09h 38m 15.0s Dec(J2000) = -00d 34' 52.4" with an uncertainty of 3.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 60%. The mask-weighted light curve shows a weak peak from ~T+0 to ~T+40 sec, then the bulk of the emission came from ~T+60 to ~T+190 sec, and then a tail extending out to ~T+380 sec. T90 (15-350 keV) is 200 +- 47 sec (estimated error including systematics). The time-averaged spectrum from T+0.60 to T+323.15 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.52 +- 0.07. The fluence in the 15-150 keV band is 6.8 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+117.39 sec in the 15-150 keV band is 2.5 +- 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/618024/BA/
GCN 17048 table
GRB_name GRB141109A
GCN_number 17048
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 17048 SUBJECT: GRB 141109A: Swift-XRT refined Analysis DATE: 14/11/09 23:04:08 GMT FROM: Paolo D'Avanzo at INAF-OAB P. D'Avanzo (INAF-OAB) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: We have analysed 5.7 ks of XRT data for GRB 141109A (D'Avanzo et al. GCN Circ. 17037), from 119 s to 46.5 ks after the BAT trigger. The data comprise 409 s in Windowed Timing (WT) mode (the first 8 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 Osborne et al. (GCN Circ. 17043). The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=0.80 (+0.25, -0.14). At T+212 s the decay steepens to an alpha of 3.25 (+0.51, -0.20) before breaking again at T+363 s to a final decay with index alpha=1.254 (+0.021, -0.020). Some flaring activity is observed between T+300 s and T+500 s. A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.673 (+0.028, -0.027). The best-fitting absorption column is 1.73 (+0.11, -0.10) x 10^21 cm^-2, in excess of the Galactic value of 3.3 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.99 (+0.14, -0.13) and a best-fitting absorption column of 1.3 (+/-0.4) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (4.4 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 1.3 (+/-0.4) x 10^21 cm^-2 Galactic foreground: 3.3 x 10^20 cm^-2 Excess significance: 4.5 sigma Photon index: 1.99 (+0.14, -0.13) If the light curve continues to decay with a power-law decay index of 1.254, the count rate at T+24 hours will be 0.033 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.1 x 10^-12 (1.4 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/00618024. This circular is an official product of the Swift-XRT team.
GCN 17049 table
GRB_name GRB141109A
GCN_number 17049
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 17049 SUBJECT: GRB 141109A: MITSuME Ishigakijima upper limits DATE: 14/11/10 01:20:00 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (OAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME and OISTER collaboration: We observed the field of GRB 141109A (D'Avanzo et al., GCNC 17037) with the optical three color (g', Rc and Ic) CCD camera attached to the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory. The observation started on 2014-11-09 18:02:45.43 UT, (~12.2 h after the burst). We could not detect the previously reported afterglow (Covino, GCNC 17039; Xu et al., GCNC 17040; Graham et al., GCNC 17041) in all the three bands. Three sigma upper limits of the OT are listed below. We used SDSS catalog for flux calibration. #T0+[day] MID-UT T-EXP[sec] g' Rc Ic ----------------------------------------------------- 0.53718 18:43:28 3660.0 >20.9 >20.9 >20.1 ----------------------------------------------------- T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 17053 table
GRB_name GRB141109A
GCN_number 17053
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 17053 SUBJECT: GRB141109A : Xinglong TNT optical observation DATE: 14/11/10 13:24:14 GMT FROM: L.P. Xin at NAOC L. P. Xin, X. F. Wang, J. Y. Wei, Y. L. Qiu, J. S. Deng, J. Wang, X. H. Han and C. Wu on behalf of EAFON report: We began to observe GRB 141109A (D'Avanzo et al., GCNC 17037) with Xinglong 0.8-m TNT telescope at 2014-11-09, 19:45:06(UT), about 13.95 hour after the burst. The optical counterpart reported by ( Covino GCN 17039; Xu et al., 17040) was detected in 24*300 sec R-band coadded image. The brightness of the optical emission is estimated to be about R=21.84 mag at the mid-time of 15.07 hours after the burst. Combined with the reports ( Covino GCN 17039 and Xu et al., 17040 ), the decay slope of this OT is roughtly about \alpha~1.12, if we fit the data with a single power law. The message may be cited.
GCN 17055 table
GRB_name GRB141109A
GCN_number 17055
Detection_method Konus-Wind Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 17055 SUBJECT: Konus-Wind observation of GRB 141109A DATE: 14/11/10 17:35:48 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R.Aptekar, V. Pal'shin, D. Frederiks, P. Oleynik, M.Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team report: The most intense part of the long GRB 141109A (Swift-BAT trigger #618024: D'Avanzo, et al., GCN Circ. 17037, Baumgartner, et al., GCN Circ. 17044) was detected by Konus-Wind in the waiting mode. The burst light curve shows two pulses started at ~T0(BAT)+31 s with a total duration of ~94 s, and a weak tail seen in the soft energy range G1 up to ~T0(BAT)+300 s. As observed by Konus-Wind, the burst had a fluence of 1.37(-0.18,+0.20)x10^-5 erg/cm2 and a 2.944-s peak flux, measured from ~T0(BAT)+81 s, of (4.9 +/- 0.8)x10^-7 erg/cm2 (both in the 20 - 1200 keV energy range). Modeling the K-W 3-channel time-integrated spectrum (from T0(BAT)+31 s to T0(BAT)+125 s) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) yields alpha = -1.24(-0.25,+0.37), and Ep = 191(-43,+76) keV. Assuming z = 2.993 (Xu et al., GCN 17040) and a standard cosmology model with H_0 = 71 km/s/Mpc, Omega_M = 0.27, Omega_Lambda = 0.73, the isotropic energy release is E_iso = 3.31(-0.59,+0.78)x10^53 erg, and the isotropic peak luminosity is L_iso = (4.8 +/- 0.9)x10^52 erg/s in 1 keV to 10 MeV at the GRB rest frame extrapolating the best exponential cutoff function fit. All the quoted errors are estimated at the 1 sigma confidence level. All the presented results are preliminary. The K-W light curve of this burst is available at http://www.ioffe.rssi.ru/LEA/GRBs/GRB141109A/
GCN 17056 table
GRB_name GRB141109A
GCN_number 17056
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 17056 SUBJECT: GRB 141109A: NOT r-band observation DATE: 14/11/10 21:27:58 GMT FROM: Zach Cano at U of Iceland ​Z. Cano (U. Iceland), D. Malesani (DARK/NBI), K. Nilsson (FINCA), T. Kangas (U. Turku), P. Jakobsson (U. Iceland) report on behalf of a larger collaboration: We observed the field of GRB 141109A (D'Avanzo et al., GCN Circ. 17037) with the 2.5-m Nordic Optical Telescope (NOT) with ALFOSC starting at 04:39 UT on 10-Nov-2014. We obtained 3x300 s frames in the SDSS r-band filter. We clearly detect the optical afterglow of GRB 141109A (Covino, GCN Circ. 17039; Xu et al., GCN Circ. 17040; Graham et al., GCN Circ. 17041; Im et al., GCN Circ. 17042; Xin et al., GCN Circ. 17053), which has an apparent magnitude of r=22.1 +- 0.1 at a mid exposure time of +22.8 hr. The magnitude is not corrected for foreground extinction, and is calibrated using several nearby SDSS stars in the FOV.​
GCN 17057 table
GRB_name GRB141109A
GCN_number 17057
Detection_method Swift-UVOT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 17057 SUBJECT: GRB 141109A: Swift/UVOT Detection DATE: 14/11/10 22:55:16 GMT FROM: Frank Marshall at GSFC F.E. Marshall (NASA/GSFC) and P. D'Avanzo (INAF-OAB) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 141109A 139 s after the BAT trigger (D'Avanzo et al., GCN Circ. 17037). A source consistent with the optical position (Covino, GCN Circ. 17039; Xu et al., GCN Circ. 17040) is detected in the initial UVOT exposures. The 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 139 289 147 20.0 +/- 0.2 white 3991 4191 197 20.8 +/- 0.2 v 5656 5856 197 >18.9 b 3786 3986 197 >20.3 u 297 6276 227 >19.7 w1 6066 6266 197 >20.1 m2 5861 6061 197 >20.7 w2 4197 4339 140 >20.9 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.04 in the direction of the burst (Schlegel et al. 1998).
GCN 17059 table
GRB_name GRB141109A
GCN_number 17059
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 17059 SUBJECT: GRB 141109A: Terskol photometry DATE: 14/11/11 17:27:57 GMT FROM: Vladimir Sokolov at SAO RAS I.V. Sokolov (TF INASAN, Russia), V.N. Komarova, A.S Moskvitin, V.V. Sokolov, T.S.Sokolova (SAO RAS, Russia), report: We observed the field of GRB 141109A (D'Avanzo et al., GCN 17037) with the 2-meter telescope Zeiss-2000 (Terskol peak) on November, 10, in 20.7 hours after the trigger. 10 x 300 sec. images in I filter were obtained. The transient discovered by REM (Covino, GCN 17039) is clearly detected in the stack frame. The OT magnitude is I = 21.1 +/- 0.1. Photometry is based on the nearby SDSS stars. Their magnitudes were converted with the transformation equations from Lupon, 2005.
GCN 17062 table
GRB_name GRB141109A
GCN_number 17062
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 17062 SUBJECT: GRB 141109A: AAO optical observations DATE: 14/11/12 19:34:55 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), R. Inasaridze (AAO), A. Volnova (IKI), Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 141109A (D'Avanzo et al., GCN 17037) with AS-32 (0.7m) telescope of Abastumani Observatory. Observations were performed under mean seeing (FWHM) of 2.4". We obtained several unfiltered images on Nov. 10 starting on (UT) 01:05:04. At the position reported in (Covino, GCN 16932) we marginally detected (S/N =2) the afterglow of GRB 141109A (Covino, GCN 16932; Xu et al., GCN 17040; Graham et al., GCN 17041). Preliminary photometry is following: date UT start t-T0 Filter Exp. OT OT_err (mid, days) (s) 2014-11-10 01:05:04 0.836 clear 37*120 21.7 0.4 The photometry is based on several SDSS-DR9 stars R magnitudes transformed from SDSS-DR9 based on Lupton transformations: SDSS-DR9 R J093801.18-003731.5 17.6330 J093759.83-003741.8 17.2029 J093815.45-003332.9 18.2004
GCN 17063 table
GRB_name GRB141109A
GCN_number 17063
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 17063 SUBJECT: GRB 141109A: TAROT La Silla observatory optical observations DATE: 14/11/12 23:17:57 GMT FROM: Alain Klotz at IRAP-CNRS-OMP Klotz A., Turpin D. (IRAP-CNRS-OMP), Boer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report: We imaged the field of GRB 141109A detected by SWIFT (trigger 618024) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile. The observations started 93s after the GRB trigger (18s after the notice). The elevation of the field increased from 10 degrees above horizon and weather conditions were good. The first image is trailed with a duration of 60.0s (see the description in Klotz et al., 2006, A&A 451, L39). This image was obtained when the gamma emission was still very active. We do not detect any OT with a limiting magnitude of: t0+93s to t0+153s : Rlim = 12.9 The optical afterglow reported by Covino (GCNC 17039) is detected in co added images (in tracking mode): t0+465s to t0+655s : Rlim = 17.3 t0+665s to t0+868s : R = 16.8 t0+879s to t0+1069s : R = 16.1 t0+1093s to t0+1283s : R = 16.7 t0+1293s to t0+1497s : Rlim = 17.2 The TAROT photometry indicates that the optical afterglow reached the maximum of light about 16 minutes after the Swift trigger. Magnitudes were estimated with the nearby NOMAD1 stars and are not corrected for galactic dust extinction.
GCN 17070 table
GRB_name GRB141109A
GCN_number 17070
Detection_method VLA Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 17070 SUBJECT: GRB 141109A: VLA detection DATE: 14/11/16 22:57:57 GMT FROM: Alessandra Corsi at Texas Tech U A. Corsi (Texas Tech U.) reports on behalf of a larger collaboration: We imaged the position of GRB 141109A (D'Avanzo et al., GCN 17037) with the Karl G. Jansky Very Large Array (VLA) in K-band at about 7.5 hours after the burst. A provisional reduction shows a source consistent with the location of the GRB NIR, optical, and X-ray afterglows (e.g., Covino et al., GCN 17039; Xu et al., GCN 17040; Osborne et al. GCN 17043). At this time, we estimate a preliminary flux of about 142 uJy at 21.8 GHz. The map rms is about 9.3 uJy. Further observations are ongoing.
GCN 17072 table
GRB_name GRB141109A
GCN_number 17072
Detection_method VLA Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 17072 SUBJECT: GRB 141109A: further VLA observations DATE: 14/11/18 02:18:28 GMT FROM: Alessandra Corsi at Texas Tech U A. Corsi and D.R. Bhakta (Texas Tech. U.) report on behalf of a larger collaboration: We imaged again the position of GRB 141109A (D'Avanzo et al., GCN 17037) with the Karl G. Jansky Very Large Array (VLA) from 2.4 d to 8.3 d after the BAT trigger. For the radio counterpart consistent with the location of the GRB NIR, optical, and X-ray afterglows (Covino et al., GCN 17039; Xu et al., GCN 17040; Osborne et al. GCN 17043; Corsi, GCN 17070), we estimate the following preliminary fluxes: Mean Epoch (d) | Freq. (GHz) | Flux (uJy) | map rms (uJy) ------------------------- 2.4 | 21.8 | 51 | 9 ------------------------- 6.3 | 14.0 | 50 | 6 ------------------------- 8.3 | 6.2 | 57 | 6