GRB141004_614390_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20141004_232405485_000003_25574301    18 stars filter C [84022535.5s - 84022595.5s] expo= 60s elev=26.5deg humid= 85% sunelev=-50.8deg (moon at 114.0deg phase=0.73 elev=+20.0 )
AL_20141004_232446438_000003_25574301    12 stars filter C [84022606.5s - 84022636.5s] expo= 30s elev=26.6deg humid= 85% sunelev=-50.8deg (moon at 114.0deg phase=0.73 elev=+20.0 )
AL_20141004_232527704_000003_25574301    14 stars filter C [84022647.7s - 84022677.7s] expo= 30s elev=26.7deg humid= 84% sunelev=-50.8deg (moon at 114.0deg phase=0.73 elev=+20.0 )
AL_20141004_232608641_000003_25574301    15 stars filter C [84022688.7s - 84022718.7s] expo= 30s elev=26.9deg humid= 84% sunelev=-50.8deg (moon at 114.0deg phase=0.73 elev=+20.0 )
AL_20141004_232649876_000003_25574301    16 stars filter C [84022729.9s - 84022759.9s] expo= 30s elev=27.0deg humid= 84% sunelev=-50.8deg (moon at 114.0deg phase=0.73 elev=+20.0 )
AL_20141004_232730579_000003_25574301    16 stars filter C [84022770.7s - 84022800.7s] expo= 30s elev=27.1deg humid= 84% sunelev=-50.7deg (moon at 114.0deg phase=0.73 elev=+20.0 )
AL_20141004_232936157_000003_25574401    22 stars filter C [84022836.2s - 84022926.2s] expo= 90s elev=27.4deg humid= 84% sunelev=-50.7deg (moon at 114.0deg phase=0.73 elev=+20.0 )
AL_20141004_233117157_000003_25574401    22 stars filter C [84022937.2s - 84023027.2s] expo= 90s elev=27.7deg humid= 84% sunelev=-50.7deg (moon at 114.0deg phase=0.73 elev=+20.0 )
AL_20141004_233257710_000003_25574401    23 stars filter C [84023037.7s - 84023127.7s] expo= 90s elev=28.0deg humid= 84% sunelev=-50.7deg (moon at 114.0deg phase=0.73 elev=+19.0 )
AL_20141004_235256801_000003_25574801    26 stars filter C [84024146.8s - 84024326.8s] expo=180s elev=31.4deg humid= 84% sunelev=-50.2deg (moon at 114.0deg phase=0.73 elev=+17.0 )
AL_20141004_235607537_000003_25574801    23 stars filter C [84024337.6s - 84024517.6s] expo=180s elev=32.0deg humid= 84% sunelev=-50.1deg (moon at 113.0deg phase=0.73 elev=+16.0 )
AL_20141004_235918975_000003_25574801    24 stars filter R [84024529.0s - 84024709.0s] expo=180s elev=32.5deg humid= 83% sunelev=-50.0deg (moon at 113.0deg phase=0.73 elev=+16.0 )
AL_20141005_000240881_000003_25574901    24 stars filter C [84024730.9s - 84024910.9s] expo=180s elev=33.1deg humid= 83% sunelev=-49.8deg (moon at 113.0deg phase=0.73 elev=+15.0 )
AL_20141005_000551869_000003_25574901    26 stars filter C [84024921.9s - 84025101.9s] expo=180s elev=33.7deg humid= 83% sunelev=-49.7deg (moon at 113.0deg phase=0.73 elev=+15.0 )
AL_20141005_000903760_000003_25574901    23 stars filter R [84025113.8s - 84025293.8s] expo=180s elev=34.2deg humid= 83% sunelev=-49.5deg (moon at 113.0deg phase=0.73 elev=+14.0 )
AL_20141005_001225213_000003_25575001    24 stars filter C [84025315.2s - 84025495.2s] expo=180s elev=34.8deg humid= 84% sunelev=-49.3deg (moon at 113.0deg phase=0.73 elev=+14.0 )
AL_20141005_001535951_000003_25575001    28 stars filter C [84025506.0s - 84025686.0s] expo=180s elev=35.4deg humid= 84% sunelev=-49.1deg (moon at 113.0deg phase=0.73 elev=+13.0 )
AL_20141005_001846670_000003_25575001    24 stars filter R [84025696.7s - 84025876.7s] expo=180s elev=35.9deg humid= 84% sunelev=-48.9deg (moon at 113.0deg phase=0.73 elev=+13.0 )
AL_20141005_005123833_000003_25575401    28 stars filter C [84027653.9s - 84027833.9s] expo=180s elev=41.4deg humid= 85% sunelev=-46.2deg (moon at 113.0deg phase=0.73 elev= +8.0 )
AL_20141005_005434755_000003_25575401    30 stars filter C [84027844.9s - 84028024.9s] expo=180s elev=41.9deg humid= 86% sunelev=-45.9deg (moon at 113.0deg phase=0.73 elev= +7.0 )
AL_20141005_005745755_000003_25575401    27 stars filter R [84028035.8s - 84028215.8s] expo=180s elev=42.4deg humid= 86% sunelev=-45.6deg (moon at 113.0deg phase=0.73 elev= +7.0 )
AL_20141005_011057726_000003_25575601    30 stars filter C [84028827.8s - 84029007.8s] expo=180s elev=44.5deg humid= 87% sunelev=-44.2deg (moon at 113.0deg phase=0.73 elev= +5.0 )
AL_20141005_011408507_000003_25575601    30 stars filter C [84029018.6s - 84029198.6s] expo=180s elev=45.0deg humid= 86% sunelev=-43.8deg (moon at 113.0deg phase=0.73 elev= +4.0 )
AL_20141005_011719511_000003_25575601    17 stars filter R [84029209.6s - 84029389.6s] expo=180s elev=45.5deg humid= 86% sunelev=-43.4deg (moon at 113.0deg phase=0.73 elev= +4.0 )
AL_20141005_013016608_000003_25575801     6 stars filter C [84029986.7s - 84030166.7s] expo=180s elev=47.4deg humid= 86% sunelev=-41.8deg (moon at 113.0deg phase=0.74 elev= +1.0 )
AL_20141005_013327593_000003_25575801    11 stars filter C [84030177.7s - 84030357.7s] expo=180s elev=47.9deg humid= 86% sunelev=-41.4deg (moon at 113.0deg phase=0.74 elev= +1.0 )
AL_20141005_013638313_000003_25575801    20 stars filter R [84030368.4s - 84030548.4s] expo=180s elev=48.4deg humid= 86% sunelev=-41.0deg (moon at 113.0deg phase=0.74 elev= +0.0 )
AL_20141005_014000298_000003_25575901    24 stars filter C [84030570.3s - 84030750.3s] expo=180s elev=48.8deg humid= 87% sunelev=-40.6deg (moon at 113.0deg phase=0.74 elev= +0.0 )
AL_20141005_014311266_000003_25575901    28 stars filter C [84030761.3s - 84030941.3s] expo=180s elev=49.3deg humid= 88% sunelev=-40.2deg (moon at 113.0deg phase=0.74 elev= +0.0 )
AL_20141005_014622191_000003_25575901    19 stars filter R [84030952.3s - 84031132.3s] expo=180s elev=49.7deg humid= 87% sunelev=-39.7deg (moon at 112.0deg phase=0.74 elev= +0.0 )
AL_20141005_015928880_000003_25576101    33 stars filter C [84031738.9s - 84031918.9s] expo=180s elev=51.5deg humid= 88% sunelev=-37.9deg (moon at 112.0deg phase=0.74 elev= -3.0 )
AL_20141005_020239411_000003_25576101    33 stars filter C [84031929.5s - 84032109.5s] expo=180s elev=51.9deg humid= 88% sunelev=-37.4deg (moon at 112.0deg phase=0.74 elev= -3.0 )
AL_20141005_020550587_000003_25576101    26 stars filter R [84032120.7s - 84032300.7s] expo=180s elev=52.3deg humid= 88% sunelev=-37.0deg (moon at 112.0deg phase=0.74 elev= -4.0 )
AL_20141005_020912759_000003_25576201    31 stars filter C [84032322.8s - 84032502.8s] expo=180s elev=52.7deg humid= 88% sunelev=-36.5deg (moon at 112.0deg phase=0.74 elev= -4.0 )
AL_20141005_021223509_000003_25576201    29 stars filter C [84032513.5s - 84032693.5s] expo=180s elev=53.0deg humid= 88% sunelev=-36.0deg (moon at 112.0deg phase=0.74 elev= -5.0 )
AL_20141005_021534259_000003_25576201    26 stars filter R [84032704.3s - 84032884.3s] expo=180s elev=53.4deg humid= 88% sunelev=-35.5deg (moon at 112.0deg phase=0.74 elev= -5.0 )
AL_20141005_022841340_000003_25576401    28 stars filter C [84033491.4s - 84033671.4s] expo=180s elev=54.8deg humid= 87% sunelev=-33.5deg (moon at 112.0deg phase=0.74 elev= -7.0 )
AL_20141005_023152762_000003_25576401    35 stars filter C [84033682.8s - 84033862.8s] expo=180s elev=55.2deg humid= 87% sunelev=-33.0deg (moon at 112.0deg phase=0.74 elev= -8.0 )
AL_20141005_023503293_000003_25576401    25 stars filter R [84033873.4s - 84034053.4s] expo=180s elev=55.5deg humid= 87% sunelev=-32.5deg (moon at 112.0deg phase=0.74 elev= -9.0 )
AL_20141005_024810189_000003_25576601    35 stars filter C [84034660.3s - 84034840.3s] expo=180s elev=56.6deg humid= 88% sunelev=-30.4deg (moon at 112.0deg phase=0.74 elev=-11.0 )
AL_20141005_025120752_000003_25576601    29 stars filter C [84034850.8s - 84035030.8s] expo=180s elev=56.9deg humid= 87% sunelev=-29.9deg (moon at 112.0deg phase=0.74 elev=-11.0 )
AL_20141005_025432111_000003_25576601    27 stars filter R [84035042.2s - 84035222.2s] expo=180s elev=57.1deg humid= 88% sunelev=-29.4deg (moon at 112.0deg phase=0.74 elev=-12.0 )
AL_20141005_031206226_000003_25576901    33 stars filter C [84036096.3s - 84036276.3s] expo=180s elev=58.2deg humid= 88% sunelev=-26.4deg (moon at 112.0deg phase=0.74 elev=-15.0 )
AL_20141005_031516976_000003_25576901    27 stars filter C [84036287.0s - 84036467.0s] expo=180s elev=58.4deg humid= 88% sunelev=-25.9deg (moon at 112.0deg phase=0.74 elev=-15.0 )
AL_20141005_031827977_000003_25576901    26 stars filter R [84036478.0s - 84036658.0s] expo=180s elev=58.5deg humid= 88% sunelev=-25.3deg (moon at 112.0deg phase=0.74 elev=-16.0 )
Informations from GCN notice:
This is not a GRB (a retractation has been edited)
Date of GRB : 2455962.9912571758 2012-02-05T11:47:24.620
Date of notice : 2455962.9915046296 2012-02-05T11:47:46.000
Refined position : no
RA(J2000.0) : 40.1 02h40m24s0
DEC(J2000.0) : 61.22 +61d13m12s00
Error box : x=31930:32040 y=84449:84559 (pixels)

Other pages about TAROT Calern observatory observations

Status of this alert received by TAROT Calern observatory.
Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=188.72797125 lat=-16.3132537654
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.068
Assuming Rv=3.1: Av=0.226 Ar=0.182 Ai=0.132 Extinction map E(B-V) from Schlegel:

Field of View is about 65 arcmin (north is NOT up !)

Bibliography (Last GCNC circulars and status of satellites)

GCN infos of this burst
GCN notice of this burst
Sloan Digital Sky Survey Observations of Gamma Ray Burst Fields
GCN info bursts
Gamma-ray burst real-time sky map
ROTSE last GRB images

Example of a GCNC email for this burst
GRB 141004: TAROT Calern observatory optical observations
Klotz A. (IRAP-CNRS-OMP), Gendre B. (IRAP-CNRS-OMP),
Boer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),
Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 141004 detected by SWIFT
(trigger 513505) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 84022535.5s after the GRB trigger
(84022514.4s after the notice). The elevation of the field increased from
26 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2012-02-05T11:47:24.864

The first image is trailed with a duration of 60.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+84022535.5s to t0+84022595.5s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+84022606.5s to t0+84022636.5s : R > 16.2

We co-added a series of exposures:
t0+84022606.5s to t0+84022926.2s : R > 17.7
---- YES
We detect a new fading source in the error box given by SWIFT
We detected the candidate couterpart mentioned by XXX et al. (GCNC XXXX)
at the following position (+/- 3 arcsec):

RA(J2000.0) = XXh XXm XX.XXs
DEC(J2000.0) +XXd XX' XX.X"

OT was R~XX.X at 84022535.5s after GRB.

Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.

N.B. Galactic coordinates are lon=188.7280 lat=-16.3133
and the galactic extinction in R band is 0.2 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.