GRB141004_6769_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20141004_233444038_000003_25551801    22 stars filter C [84246765.6s - 84246855.6s] expo= 90s elev=28.3deg humid= 84% sunelev=-50.7deg (moon at 114.0deg phase=0.73 elev=+19.0 )
AL_20141004_233625241_000003_25551801    22 stars filter C [84246866.8s - 84246956.8s] expo= 90s elev=28.6deg humid= 84% sunelev=-50.6deg (moon at 114.0deg phase=0.73 elev=+19.0 )
AL_20141004_233806007_000003_25551801    25 stars filter C [84246967.6s - 84247057.6s] expo= 90s elev=28.9deg humid= 84% sunelev=-50.6deg (moon at 114.0deg phase=0.73 elev=+19.0 )
AL_20141004_233955491_000003_25551901    22 stars filter C [84247077.1s - 84247167.1s] expo= 90s elev=29.2deg humid= 84% sunelev=-50.6deg (moon at 114.0deg phase=0.73 elev=+18.0 )
AL_20141004_234136538_000003_25551901    25 stars filter C [84247178.1s - 84247268.1s] expo= 90s elev=29.5deg humid= 84% sunelev=-50.5deg (moon at 114.0deg phase=0.73 elev=+18.0 )
AL_20141004_234317223_000003_25551901    24 stars filter C [84247278.9s - 84247368.9s] expo= 90s elev=29.8deg humid= 84% sunelev=-50.5deg (moon at 114.0deg phase=0.73 elev=+18.0 )
AL_20141004_234509364_000003_25552001    24 stars filter C [84247391.0s - 84247481.0s] expo= 90s elev=30.2deg humid= 85% sunelev=-50.4deg (moon at 114.0deg phase=0.73 elev=+18.0 )
AL_20141004_234650583_000003_25552001    22 stars filter C [84247492.2s - 84247582.2s] expo= 90s elev=30.5deg humid= 85% sunelev=-50.4deg (moon at 114.0deg phase=0.73 elev=+17.0 )
AL_20141004_234831364_000003_25552001    24 stars filter C [84247593.0s - 84247683.0s] expo= 90s elev=30.8deg humid= 85% sunelev=-50.3deg (moon at 114.0deg phase=0.73 elev=+17.0 )
AL_20141005_002217607_000003_25552401    28 stars filter C [84249529.2s - 84249709.2s] expo=180s elev=36.5deg humid= 84% sunelev=-48.7deg (moon at 113.0deg phase=0.73 elev=+12.0 )
AL_20141005_002528123_000003_25552401    27 stars filter C [84249719.7s - 84249899.7s] expo=180s elev=37.1deg humid= 83% sunelev=-48.5deg (moon at 113.0deg phase=0.73 elev=+12.0 )
AL_20141005_002838655_000003_25552401    23 stars filter R [84249910.3s - 84250090.3s] expo=180s elev=37.6deg humid= 83% sunelev=-48.2deg (moon at 113.0deg phase=0.73 elev=+11.0 )
AL_20141005_003154514_000003_25552501    29 stars filter C [84250106.1s - 84250286.1s] expo=180s elev=38.2deg humid= 83% sunelev=-48.0deg (moon at 113.0deg phase=0.73 elev=+11.0 )
AL_20141005_003505268_000003_25552501    29 stars filter C [84250296.9s - 84250476.9s] expo=180s elev=38.7deg humid= 85% sunelev=-47.7deg (moon at 113.0deg phase=0.73 elev=+10.0 )
AL_20141005_003816221_000003_25552501    24 stars filter R [84250487.8s - 84250667.8s] expo=180s elev=39.2deg humid= 85% sunelev=-47.4deg (moon at 113.0deg phase=0.73 elev=+10.0 )
AL_20141005_004145502_000003_25552601    28 stars filter C [84250697.1s - 84250877.1s] expo=180s elev=39.8deg humid= 86% sunelev=-47.1deg (moon at 113.0deg phase=0.73 elev= +9.0 )
AL_20141005_004456520_000003_25552601    26 stars filter C [84250888.1s - 84251068.1s] expo=180s elev=40.3deg humid= 85% sunelev=-46.9deg (moon at 113.0deg phase=0.73 elev= +9.0 )
AL_20141005_004807520_000003_25552601    24 stars filter R [84251079.1s - 84251259.1s] expo=180s elev=40.9deg humid= 85% sunelev=-46.6deg (moon at 113.0deg phase=0.73 elev= +8.0 )
AL_20141005_010105318_000003_25552801    28 stars filter C [84251857.0s - 84252037.0s] expo=180s elev=43.0deg humid= 87% sunelev=-45.3deg (moon at 113.0deg phase=0.73 elev= +6.0 )
AL_20141005_010417005_000003_25552801    31 stars filter C [84252048.6s - 84252228.6s] expo=180s elev=43.5deg humid= 87% sunelev=-44.9deg (moon at 113.0deg phase=0.73 elev= +6.0 )
AL_20141005_010728476_000003_25552801    24 stars filter R [84252240.1s - 84252420.1s] expo=180s elev=44.0deg humid= 88% sunelev=-44.6deg (moon at 113.0deg phase=0.73 elev= +5.0 )
AL_20141005_012035355_000003_25553001    18 stars filter C [84253027.0s - 84253207.0s] expo=180s elev=46.0deg humid= 85% sunelev=-43.0deg (moon at 113.0deg phase=0.73 elev= +3.0 )
AL_20141005_012346089_000003_25553001    18 stars filter C [84253217.7s - 84253397.7s] expo=180s elev=46.5deg humid= 86% sunelev=-42.7deg (moon at 113.0deg phase=0.74 elev= +2.0 )
AL_20141005_012657093_000003_25553001     8 stars filter R [84253408.7s - 84253588.7s] expo=180s elev=46.9deg humid= 86% sunelev=-42.3deg (moon at 113.0deg phase=0.74 elev= +2.0 )
AL_20141005_014944535_000003_25553301    28 stars filter C [84254776.2s - 84254956.2s] expo=180s elev=50.2deg humid= 88% sunelev=-39.3deg (moon at 112.0deg phase=0.74 elev= -1.0 )
AL_20141005_015255566_000003_25553301    29 stars filter C [84254967.2s - 84255147.2s] expo=180s elev=50.6deg humid= 88% sunelev=-38.8deg (moon at 112.0deg phase=0.74 elev= -1.0 )
AL_20141005_015606536_000003_25553301    23 stars filter R [84255158.1s - 84255338.1s] expo=180s elev=51.0deg humid= 88% sunelev=-38.4deg (moon at 112.0deg phase=0.74 elev= -2.0 )
AL_20141005_021856807_000003_25553601    31 stars filter C [84256528.4s - 84256708.4s] expo=180s elev=53.8deg humid= 87% sunelev=-35.0deg (moon at 112.0deg phase=0.74 elev= -6.0 )
AL_20141005_022207557_000003_25553601    41 stars filter C [84256719.2s - 84256899.2s] expo=180s elev=54.1deg humid= 87% sunelev=-34.5deg (moon at 112.0deg phase=0.74 elev= -6.0 )
AL_20141005_022518542_000003_25553601    29 stars filter R [84256910.1s - 84257090.1s] expo=180s elev=54.5deg humid= 87% sunelev=-34.0deg (moon at 112.0deg phase=0.74 elev= -7.0 )
AL_20141005_023825203_000003_25553801    34 stars filter C [84257696.8s - 84257876.8s] expo=180s elev=55.8deg humid= 87% sunelev=-32.0deg (moon at 112.0deg phase=0.74 elev= -9.0 )
AL_20141005_024136156_000003_25553801    33 stars filter C [84257887.8s - 84258067.8s] expo=180s elev=56.1deg humid= 88% sunelev=-31.5deg (moon at 112.0deg phase=0.74 elev=-10.0 )
AL_20141005_024447156_000003_25553801    25 stars filter R [84258078.8s - 84258258.8s] expo=180s elev=56.4deg humid= 88% sunelev=-30.9deg (moon at 112.0deg phase=0.74 elev=-10.0 )
AL_20141005_025752896_000003_25554001    31 stars filter C [84258864.5s - 84259044.5s] expo=180s elev=57.4deg humid= 87% sunelev=-28.8deg (moon at 112.0deg phase=0.74 elev=-12.0 )
AL_20141005_030103615_000003_25554001    31 stars filter C [84259055.2s - 84259235.2s] expo=180s elev=57.6deg humid= 87% sunelev=-28.3deg (moon at 112.0deg phase=0.74 elev=-13.0 )
AL_20141005_030414615_000003_25554001    28 stars filter R [84259246.2s - 84259426.2s] expo=180s elev=57.8deg humid= 87% sunelev=-27.7deg (moon at 112.0deg phase=0.74 elev=-14.0 )
AL_20141005_032150540_000003_25554301    31 stars filter C [84260302.1s - 84260482.1s] expo=180s elev=58.6deg humid= 88% sunelev=-24.8deg (moon at 112.0deg phase=0.74 elev=-17.0 )
AL_20141005_032502009_000003_25554301    30 stars filter C [84260493.6s - 84260673.6s] expo=180s elev=58.8deg humid= 88% sunelev=-24.2deg (moon at 111.0deg phase=0.74 elev=-17.0 )
AL_20141005_032812920_000003_25554301    26 stars filter R [84260684.6s - 84260864.6s] expo=180s elev=58.9deg humid= 88% sunelev=-23.7deg (moon at 111.0deg phase=0.74 elev=-18.0 )
AL_20141005_033134091_000003_25554401    26 stars filter C [84260885.8s - 84261065.8s] expo=180s elev=58.9deg humid= 88% sunelev=-23.1deg (moon at 111.0deg phase=0.74 elev=-18.0 )
AL_20141005_033445091_000003_25554401    33 stars filter C [84261076.7s - 84261256.7s] expo=180s elev=59.0deg humid= 88% sunelev=-22.5deg (moon at 111.0deg phase=0.74 elev=-19.0 )
AL_20141005_033755906_000003_25554401    27 stars filter R [84261267.5s - 84261447.5s] expo=180s elev=59.1deg humid= 88% sunelev=-22.0deg (moon at 111.0deg phase=0.74 elev=-19.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455960.4029812501 2012-02-02T21:40:17.580
Date of notice : 2455960.4030439816 2012-02-02T21:40:23.000
Refined position : yes (error radius=150.0 arcsec)
RA(J2000.0) : 203.5064 13h34m01s5
DEC(J2000.0) : 22.7746 +22d46m28s56
Error box : x=102361:102453 y=-69948:-69857 (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=188.728021616 lat=-16.3128213077
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 INTEGRAL
(trigger 6461) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 84246765.6s after the GRB trigger
(84246765.9s after the notice). The elevation of the field increased from
28 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2012-02-02T21:40:23.302

The first image is trailed with a duration of 90.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+84246765.6s to t0+84246855.6s : R > 15.1

The second image is 90.0s exposure in tracking mode:
t0+84246866.8s to t0+84246956.8s : R > 16.2

We co-added a series of exposures:
t0+84246866.8s to t0+84247481.0s : R > 17.7
---- YES
We detect a new fading source in the error box given by INTEGRAL
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 84246765.6s 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=-16.3128
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.