GRB140311B

This page lists all entries on GRB140311B in GRBweb

Summary Fermi GBM IPN Swift GCN 15945 GCN 15948 GCN 15949 GCN 15950 GCN 15951 GCN 15955 GCN 15958 GCN 15960 GCN 15963 GCN 15970 GCN 15972 GCN 15975 GCN 15979 GCN 15995

Summary table
Variable Value Source
GRB_name_Fermi GRB140311885
T0 21:14:29 UTC GCN_circulars,Swift Det
ra 252.3250° Swift
decl 52.7242° Swift
pos_error 1.94e-04° Swift
T90 72.193 s Fermi_GBM
T90_error 8.764 s Fermi_GBM
T90_start 21:14:31.294 UTC Fermi_GBM
fluence 7.02e-06 erg/cm² Fermi_GBM
fluence_error 6.75e-08 erg/cm² Fermi_GBM
T100 74.487 s
GBM_located False
mjd 56727.88505787037 GCN_circulars,Swift Det
Fermi GBM table
GRB_name_Fermi GRB140311885
trigger_name bn140311885
ra 252.2908°
decl 52.7469°
pos_error 3.81e+00°
datum 2014-03-11
t_trigger 21:14:35.646 UTC
T90 72.193 s
T90_error 8.764 s
T90_start 21:14:31.294 UTC
fluence 7.02e-06 erg/cm²
fluence_error 6.75e-08 erg/cm²
flux_1024 3.21e+00 erg/cm²/s
flux_1024_error 2.84e-01 erg/cm²/s
flux_1024_time 5.76e-01 erg/cm²/s
flux_64 5.81e+00 erg/cm²/s
flux_64_error 1.55e+00 erg/cm²/s
IPN table
GRB_name GRB140311B
ra 252.2917°
decl 52.7500°
pos_error 5.00e-02°
Swift table
GRB_name GRB140311B
t_trigger 21:14:29 UTC
ra 252.3250°
decl 52.7242°
pos_error 1.94e-04°
T90 70.0 s
GCN 15945 table
GRB_name GRB140311B
GCN_number 15945
Detection_method Swift Det
t_trigger 21:14:29 UTC
ra 252.2910°
decl 52.7470°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15945 SUBJECT: GRB 140311B: Swift detection of a burst DATE: 14/03/11 21:36:02 GMT FROM: Judith Racusin at GSFC J. L. Racusin (NASA/GSFC), W. H. Baumgartner (GSFC/UMBC), N. Gehrels (NASA/GSFC), L. Izzo (URoma/ICRA), J. A. Kennea (PSU), D. Malesani (DARK/NBI), F. E. Marshall (NASA/GSFC), B. Sbarufatti (INAF-OAB/PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team: At 21:14:29 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140311B (trigger=591392). Swift could not immediately slew to the burst due to the Earth limb constraint. The BAT on-board calculated location is RA, Dec 252.291, +52.747 which is RA(J2000) = 16h 49m 10s Dec(J2000) = +52d 44' 50" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). We are awaiting information on the BAT light curve. Due to an observing constraint, Swift will not slew until T0+55 minutes. There will be no XRT or UVOT data until this time. The observation of this burst will delay the observation of GRB 140311A. Burst Advocate for this burst is J. L. Racusin (judith.racusin 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 15948 table
GRB_name GRB140311B
GCN_number 15948
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15948 SUBJECT: GRB 140311B: MASTER early optical observations DATE: 14/03/11 22:02:51 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 GRB140311B 29 sec after notice time and 107 sec after trigger time at 2014-03-11 21:16:16 UT in two polarizations. On our first (20s exposure) set we haven't found optical transient within SWIFT error-box (Racusin et. al. GCN 15945). The 5-sigma upper limit has been about 17.0 mag. The observations is proceed. MASTER II robotic telescope located in Blagoveschensk was pointed to the GRB140311B 9 sec after notice time and 85 sec after trigger time at 2014-03-11 21:15:54 UT in two polarizations. On our first (20s exposure) set we haven't found optical transient within SWIFT error-box. The 5-sigma upper limit has been about 14.0 mag. The observations on this place made on the bright morning sky. The message may be cited. [GCN OPS NOTE(12mar14): Per author's request, the Subject was changed from "MASTER OT light curve (fwd)" to "MASTER early optical observations".]
GCN 15949 table
GRB_name GRB140311B
GCN_number 15949
Detection_method Other
ra 252.3249°
decl 52.7240°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15949 SUBJECT: GRB 140311B: Nanshan afterglow detection DATE: 14/03/11 22:52:01 GMT FROM: Dong Xu at DARK/NBI D. Xu (DARK/NBI), C.-H. Bai, X. Zhang, A. Esamdin, L. Ma (XAO) report: We observed the field of GRB 140311B (Racusin et al., GCN 15945) using the 1m telescope located in Nanshan, Xinjiang, China. Observations started at 21:41:05 UT on 2014-03-11 and some 300s/600s R-band frames were obtained. The afterglow is detected in each image within the XRT error circle (http://www.swift.ac.uk/sper/) at coordinates R.A. (J2000) = 16:49:17.97 Dec. (J2000) = +52:43:26.41 Uncertainty radius: ~1.5 aecsec The first 300s image reveals that the afterglow has m(R)=20.6 at 29.1 min post-burst, calibrated with nearby two SDSS stars. Observations are ongoing.
GCN 15950 table
GRB_name GRB140311B
GCN_number 15950
Detection_method Swift-XRT Other
ra 252.3246°
decl 52.7239°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15950 SUBJECT: GRB 140311B: Swift-XRT observations DATE: 14/03/11 23:07:34 GMT FROM: Phil Evans at U of Leicester J.P. Osborne (U. Leicester), D.N. Burrows (PSU), J.A. Kennea (PSU), G. Tagliaferri (INAF-OAB), S. Campana (INAF-OAB) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: The XRT began observing the field of GRB 140311B at 22:11:04.3 UT, 3394.7 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 252.32458, 52.72393 which is equivalent to: RA(J2000) = 16h 49m 17.90s Dec(J2000) = +52d 43' 26.1" with an uncertainty of 3.6 arcseconds (radius, 90% containment). This location is 110 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 3.03 x 10^20 cm^-2 (Kalberla et al. 2005).
GCN 15951 table
GRB_name GRB140311B
GCN_number 15951
Detection_method Swift-XRT Other
ra 252.3242°
decl 52.7240°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15951 SUBJECT: GRB140311B: Swift/XRT position DATE: 14/03/11 23:08:55 GMT FROM: Valerio D'Elia at ASDC V. D'Elia (ASDC), L. Izzo (URoma/ICRA) and J. Racusin (NASA/GSFC) report: XRT began observing GRB140311B (Racusin et al. GCN 15945) 55 minutes after the trigger. Using promptly downlinked data we find a bright uncatalogued X ray source located at RA,Dec = 252.3242, 52.7240 which is equivalent to: RA (J2000) = 16 49 17.81 DEC (J2000) = +52 43 26.4 with an uncertainty of 3.6 arcsec (radius, 90% containment). This location is 109.6 arcsec from the BAT position, inside the BAT error circle. This is an official product of the Swift/XRT team. ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
GCN 15955 table
GRB_name GRB140311B
GCN_number 15955
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15955 SUBJECT: GRB 140311B: TAROT Calern observatory optical observations DATE: 14/03/12 00:42:49 GMT FROM: Alain Klotz at IRAP-CNRS-OMP Klotz A., Turpin D. (IRAP-CNRS-OMP), Gendre B., Boer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report: We imaged the field of GRB 140311B detected by SWIFT (trigger 513505) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France. The observations started 5 minutes after the GRB trigger The elevation of the field increased from 20 degrees above horizon and weather conditions were good. The first image is 60.0s exposure in tracking mode. We do not detect the OT discovered by Xu et al. (GCNC 15949) with a limiting magnitude of: t0+246s to t0+306s : Rlim = 17.3 We co-added a series of exposures: We do not detect the OT with limiting magnitudes of: t0+246s to t0+511s : Rlim = 17.8 t0+541s to t0+1568s : Rlim = 18.4 Magnitudes were estimated with the nearby NOMAD1 stars and are not corrected for galactic dust extinction. N.B. Galactic coordinates are lon= 80.3934 lat=+39.5637 and the galactic extinction in R band is about 0.2 magnitude estimated from D. Schlegel et al. 1998ApJ...500..525S. This message may be cited.
GCN 15958 table
GRB_name GRB140311B
GCN_number 15958
Detection_method Swift-XRT Det
ra 252.3252°
decl 52.7243°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15958 SUBJECT: GRB 140311B: Enhanced Swift-XRT position DATE: 14/03/12 02:30:17 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 2577 s of XRT Photon Counting mode data and 6 UVOT images for GRB 140311B, 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 = 252.32518, +52.72426 which is equivalent to: RA (J2000): 16h 49m 18.04s Dec (J2000): +52d 43' 27.3" 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 15960 table
GRB_name GRB140311B
GCN_number 15960
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15960 SUBJECT: GRB 140311B: final MASTER OT light curve DATE: 14/03/12 10:53:33 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University 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 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 GRB140311B (Racusin et al., GCN 15945) 29 sec after notice time and 107 sec after trigger time (Gorbovskoy et. al GCN 15948 ) and made observations during ~ 1.5 h before sunrise. We see OT (Xu et. al. GCN 15949) only on several coadditional images. On all of them the object is close to limit and has s/n from 3 to 6. Our preliminary ligth curve available in table below and on image here http://master.sai.msu.ru/static/GRB/grb140311B.png. T_start T_t-T_m Exptime Mag. Coadd [s] [s] [m] 21:17:12 326 220 19.4 4 21:18:18 432 300 19.0 4 21:16:16 557 650 19.4 8 21:19:44 557 380 18.7 4 21:19:44 661 550 18.9 5 21:21:19 708 490 18.9 4 21:18:18 834 960 19.4 8 21:25:40 1485 1380 19.8 8 21:25:40 1702 1740 20.0 10 T_t is GRB trigger time, T_m is middle time of our exposure. Our unfiltered magnitude is well described by a parity 0.8R + 0.2B (USNO B1) The power low index alpha from 380 to 1740 seconds after the trigger is 1.07+-0.10 (F ~ t-apha). We also apologize for an error in the title of our previous telegram (GCN 15948) if it misled somebody. The message may be cited.
GCN 15963 table
GRB_name GRB140311B
GCN_number 15963
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15963 SUBJECT: GRB 140311B: Swift-XRT refined Analysis DATE: 14/03/12 13:20:17 GMT FROM: Valerio D'Elia at ASDC V. D'Elia (ASDC), L. Izzo (URoma/ICRA) and J. L. Racusin (NASA/GSFC) report on behalf of the Swift-XRT team: We have analysed 7.8 ks of XRT data for GRB 140311B (Racusin et al. GCN Circ. 15945), from 3.4 ks to 46.3 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 15958). The light curve can be modelled with a power-law decay with a decay index of alpha=1.66 (+0.18, -0.15). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.68 (+0.25, -0.23). The best-fitting absorption column is 1.6 (+0.9, -0.8) x 10^21 cm^-2, in excess of the Galactic value of 3.6 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 4.1 x 10^-11 (4.9 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 1.6 (+0.9, -0.8) x 10^21 cm^-2 Galactic foreground: 3.6 x 10^20 cm^-2 Excess significance: 2.7 sigma Photon index: 1.68 (+0.25, -0.23) If the light curve continues to decay with a power-law decay index of 1.66, the count rate at T+24 hours will be 9.6 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.0 x 10^-14 (4.8 x 10^-14) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00591392. This circular is an official product of the Swift-XRT team.
GCN 15970 table
GRB_name GRB140311B
GCN_number 15970
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15970 SUBJECT: GRB 140311B: RATIR Optical and NIR Observations DATE: 14/03/12 17:17:37 GMT FROM: Owen Littlejohns at Az State U Owen Littlejohns (ASU), Antonino Cucchiara (ORAU/GSFC), 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), 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 observed the field of GRB 140311B (Racusin, et al., GCN 15945) 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 12.37 to 2014/03 12.52 UTC (11.52 to 15.25 hours after the BAT trigger), obtaining a total of 2.84 hours exposure in the r and i bands and 1.19 hours exposure in the Z and Y bands. For a source within the Swift-XRT error circle, in comparison with the SDSS DR9 and 2MASS, we obtain the following upper limits (3-sigma): r > 23.99 i > 23.82 Z > 22.85 Y > 22.26 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. In comparison to the earlier detection of the optical afterglow (Xu, et al., GCN 15949) the GRB has faded. A power-law temporal decay with an index of alpha = -0.94 or steeper is required for our r-band upper limit to be consistent with the earlier detection. We thank the staff of the Observatorio Astronmico Nacional in San Pedro Mrtir.
GCN 15972 table
GRB_name GRB140311B
GCN_number 15972
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 15972 SUBJECT: GRB 140311B: Swift/UVOT Upper Limits DATE: 14/03/12 19:26:59 GMT FROM: Stephen Holland at STScI S. T. Holland (STScI) and J. L. Racusin (NASA/GSFC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 140311B 3398 s after the BAT trigger (Racusin et al. 2014, GCNC 15945). We do not detect any new source consistent with the Nansan afterglow position (Xu et al. 2014, GCNC 15949) in any of the UVOT exposures. Preliminary 3-sigma upper limits, using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373), for the finding chart and summed exposures are presented below. --------------------------------------------------- Filter TSTART TSTOP Exposure Mag --------------------------------------------------- white (FC) 3398 3548 147 >21.2 --------------------------------------------------- v 3555 5191 393 >20.0 b 4375 5990 372 >20.4 u 4170 5806 393 >20.2 uvw1 3965 5601 393 >20.3 uvm2 3760 5396 393 >20.2 uvw2 4787 4986 197 >20.1 white 4580 4780 197 >21.4 --------------------------------------------------- The quoted upper limits have not been corrected for the expected extinction due to the Galactic reddening along the line of sight to this burst of E(B-V) = 0.05 mag (Schlafly et al. 2011, ApJS, 737, 103).
GCN 15975 table
GRB_name GRB140311B
GCN_number 15975
Detection_method Fermi GBM Det
t_trigger 21:14:35.650 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 15975 SUBJECT: GRB 140311B: Fermi GBM Detection DATE: 14/03/12 20:40:40 GMT FROM: Matthew Stanbro at UAH/Fermi M. Stanbro (UAH) reports on behalf of the Fermi GBM Team: "At 21:14:35.65 UT on 11 March 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140311B (trigger 416265278/140311885), which was also detected by Swift (J. L. Racusin et al. 2014, GCN 15945). The GBM on-ground location, using the Fermi GBM trigger data, is consistent with the Swift/BAT location.The angle to the Fermi LAT boresight is 110 deg. from Swift location. The GBM light curve consists of several overlapping peaks with a combined duration (T90) of 72 s (50-300 keV). The time-averaged spectrum from T0-3 s to T0+69 s is well fit by a power law function with an exponential high energy cutoff. The power law index is -0.5 +/- 0.1 and the high energy cutoff, parameterized as Epeak, is 117 +/- 8 keV. The event fluence (10-1000 keV) in this time interval is (7.9 +/- 0.4)E-06 erg/cm^2. The 1.0-sec peak photon flux measured starting from T0+0.6 s in the 10-1000 keV band is 3.2 +/- 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 15979 table
GRB_name GRB140311B
GCN_number 15979
Detection_method Swift-BAT Det
ra 252.3330°
decl 52.7330°
Circular_text TITLE: GCN CIRCULAR NUMBER: 15979 SUBJECT: GRB 140311B: Swift-BAT refined analysis DATE: 14/03/13 03:07:06 GMT FROM: Jay R. Cummings at NASA/GSFC/Swift A. Y. Lien (NASA/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (looking), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), 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-0 to T+3 sec from the recent telemetry downlink, we report further analysis of BAT GRB 140311B (trigger #591392) (Racusin, et al., GCN Circ. 15945). The BAT ground-calculated position is RA, Dec = 252.333, +52.733 deg which is RA(J2000) = 16h 49m 20.0s Dec(J2000) = +52d 44' 00" with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 89%. This trigger followed that of GRB 140311A by only about 9 minutes, which led to a complication in recording the photon-event data. Only 3 seconds of photon-event data was recorded, so no mask-weighted lightcurve is available. T90 (15-350 keV) is estimated to be 70 +- 10 sec. The burst had multiple peaks. Peak emission occurred about 15 seconds after the trigger time. The time-averaged spectrum for the limited range of data available (about 5% of T90) from T+0 to T+3 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.12 +- 0.15 (90% confidence). Because of the lack of event data, the fluence is not available. Based on an eye-ball estimate comparing the non-maskweighted lightcurve to those of other bursts with a similar partial coding, the fluence in the 15-150 keV band was on the order of several times 10^-6 ergs/cm^2
GCN 15995 table
GRB_name GRB140311B
GCN_number 15995
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 15995 SUBJECT: GRB 140311B: Mondy optical limit DATE: 14/03/18 20:45:27 GMT FROM: Alexei Pozanenko at IKI, Moscow A.Volnova (IKI), E. Klunko (ISTP), I. Korobtsev (ISTP), M. Eselevich (ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 140311B (Racusin et al., GCN 15945) with AZT-33IK telescope of Mondy observatory starting on Mar. 12 (UT) 20:21:16. Within enhanced Swift-XRT eror circle (Evans et al., GCN 15958) we do not detect the optical afterglow (Xu et al., GCN 15949). Details of the photometry is following: date UT start t-T0 Exp. Filter UpperLimit (3sigma) (mid, days) (s) 2014-03-12 20:21:16 0.98389 30x120 R 20.2 The photometry is based on reference star SDSS-DR9, (R mag, transformation by Lupton 2005): N SDSS_id R(Lupton) err J164910.91+524333.6 17.449 0.009