GRB141225_622476_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20141225_231058522_000003_32383601    10 stars filter C [91106518.6s - 91106608.6s] expo= 90s elev=50.3deg humid= 51% sunelev=-69.1deg (moon at 154.0deg phase=0.29 elev=-29.0 )
AL_20141225_231239520_000003_32383601    10 stars filter C [91106619.6s - 91106709.6s] expo= 90s elev=50.6deg humid= 51% sunelev=-69.2deg (moon at 154.0deg phase=0.29 elev=-29.0 )
AL_20141225_231420551_000003_32383601    10 stars filter C [91106720.6s - 91106810.6s] expo= 90s elev=50.9deg humid= 51% sunelev=-69.3deg (moon at 154.0deg phase=0.29 elev=-29.0 )
AL_20141225_231619567_000003_32383701    11 stars filter C [91106839.6s - 91106929.6s] expo= 90s elev=51.2deg humid= 51% sunelev=-69.3deg (moon at 154.0deg phase=0.29 elev=-30.0 )
AL_20141225_231800067_000003_32383701     8 stars filter C [91106940.2s - 91107030.2s] expo= 90s elev=51.5deg humid= 51% sunelev=-69.4deg (moon at 154.0deg phase=0.29 elev=-30.0 )
AL_20141225_231941113_000003_32383701    10 stars filter C [91107041.1s - 91107131.1s] expo= 90s elev=51.9deg humid= 51% sunelev=-69.4deg (moon at 154.0deg phase=0.29 elev=-30.0 )
AL_20141225_232127113_000003_32383801    12 stars filter C [91107147.2s - 91107237.2s] expo= 90s elev=52.2deg humid= 51% sunelev=-69.5deg (moon at 154.0deg phase=0.29 elev=-31.0 )
AL_20141225_232308139_000003_32383801     8 stars filter C [91107248.2s - 91107338.2s] expo= 90s elev=52.5deg humid= 51% sunelev=-69.5deg (moon at 154.0deg phase=0.29 elev=-31.0 )
AL_20141225_232449343_000003_32383801    11 stars filter C [91107349.4s - 91107439.4s] expo= 90s elev=52.8deg humid= 51% sunelev=-69.6deg (moon at 154.0deg phase=0.29 elev=-31.0 )
AL_20141225_232639421_000003_32383901    10 stars filter C [91107459.5s - 91107549.5s] expo= 90s elev=53.1deg humid= 51% sunelev=-69.6deg (moon at 154.0deg phase=0.29 elev=-31.0 )
AL_20141225_232820389_000003_32383901     8 stars filter C [91107560.4s - 91107650.4s] expo= 90s elev=53.4deg humid= 50% sunelev=-69.6deg (moon at 154.0deg phase=0.29 elev=-32.0 )
AL_20141225_233001311_000003_32383901     8 stars filter C [91107661.4s - 91107751.4s] expo= 90s elev=53.7deg humid= 51% sunelev=-69.6deg (moon at 154.0deg phase=0.29 elev=-32.0 )
AL_20141225_233426495_000003_32384001    13 stars filter C [91107836.6s - 91108016.6s] expo=180s elev=54.4deg humid= 51% sunelev=-69.6deg (moon at 154.0deg phase=0.29 elev=-33.0 )
AL_20141225_233737526_000003_32384001    11 stars filter C [91108027.6s - 91108207.6s] expo=180s elev=55.0deg humid= 52% sunelev=-69.6deg (moon at 154.0deg phase=0.29 elev=-33.0 )
AL_20141225_234049042_000003_32384001     8 stars filter R [91108219.1s - 91108399.1s] expo=180s elev=55.5deg humid= 53% sunelev=-69.6deg (moon at 154.0deg phase=0.29 elev=-34.0 )
AL_20141225_234410443_000003_32384101    13 stars filter C [91108420.5s - 91108600.5s] expo=180s elev=56.1deg humid= 53% sunelev=-69.5deg (moon at 154.0deg phase=0.29 elev=-34.0 )
AL_20141225_234721881_000003_32384101    12 stars filter C [91108611.9s - 91108791.9s] expo=180s elev=56.7deg humid= 53% sunelev=-69.5deg (moon at 154.0deg phase=0.29 elev=-35.0 )
AL_20141225_235033068_000003_32384101     7 stars filter R [91108803.1s - 91108983.1s] expo=180s elev=57.3deg humid= 54% sunelev=-69.4deg (moon at 154.0deg phase=0.29 elev=-35.0 )
AL_20141225_235354904_000003_32384201    11 stars filter C [91109005.0s - 91109185.0s] expo=180s elev=57.9deg humid= 55% sunelev=-69.3deg (moon at 154.0deg phase=0.29 elev=-36.0 )
AL_20141225_235706185_000003_32384201    15 stars filter C [91109196.2s - 91109376.2s] expo=180s elev=58.5deg humid= 56% sunelev=-69.1deg (moon at 154.0deg phase=0.29 elev=-36.0 )
AL_20141226_000016748_000003_32384201     6 stars filter R [91109386.7s - 91109566.7s] expo=180s elev=59.1deg humid= 55% sunelev=-69.0deg (moon at 154.0deg phase=0.29 elev=-37.0 )
AL_20141226_000338797_000003_32384301    12 stars filter C [91109588.9s - 91109768.9s] expo=180s elev=59.7deg humid= 54% sunelev=-68.8deg (moon at 154.0deg phase=0.29 elev=-37.0 )
AL_20141226_000649984_000003_32384301    12 stars filter C [91109780.1s - 91109960.1s] expo=180s elev=60.2deg humid= 53% sunelev=-68.6deg (moon at 154.0deg phase=0.29 elev=-38.0 )
AL_20141226_001000765_000003_32384301     8 stars filter R [91109970.8s - 91110150.8s] expo=180s elev=60.8deg humid= 52% sunelev=-68.4deg (moon at 154.0deg phase=0.29 elev=-38.0 )
AL_20141226_001331460_000003_32384401    14 stars filter C [91110181.5s - 91110361.5s] expo=180s elev=61.4deg humid= 52% sunelev=-68.1deg (moon at 154.0deg phase=0.29 elev=-39.0 )
AL_20141226_001642414_000003_32384401    12 stars filter C [91110372.5s - 91110552.5s] expo=180s elev=62.0deg humid= 52% sunelev=-67.9deg (moon at 154.0deg phase=0.29 elev=-39.0 )
AL_20141226_001953007_000003_32384401     8 stars filter R [91110563.0s - 91110743.0s] expo=180s elev=62.6deg humid= 52% sunelev=-67.6deg (moon at 154.0deg phase=0.29 elev=-40.0 )
AL_20141226_002309304_000003_32384501    13 stars filter C [91110759.3s - 91110939.3s] expo=180s elev=63.1deg humid= 53% sunelev=-67.3deg (moon at 154.0deg phase=0.29 elev=-40.0 )
AL_20141226_002620239_000003_32384501    11 stars filter C [91110950.3s - 91111130.3s] expo=180s elev=63.7deg humid= 52% sunelev=-67.0deg (moon at 154.0deg phase=0.29 elev=-40.0 )
AL_20141226_002930786_000003_32384501    10 stars filter R [91111140.8s - 91111320.8s] expo=180s elev=64.3deg humid= 52% sunelev=-66.7deg (moon at 154.0deg phase=0.29 elev=-41.0 )
AL_20141226_003254942_000003_32384601    11 stars filter C [91111345.0s - 91111525.0s] expo=180s elev=64.9deg humid= 52% sunelev=-66.4deg (moon at 154.0deg phase=0.30 elev=-41.0 )
AL_20141226_003606184_000003_32384601    12 stars filter C [91111536.3s - 91111716.3s] expo=180s elev=65.4deg humid= 51% sunelev=-66.0deg (moon at 154.0deg phase=0.30 elev=-42.0 )
AL_20141226_003916996_000003_32384601    10 stars filter R [91111727.0s - 91111907.0s] expo=180s elev=66.0deg humid= 50% sunelev=-65.7deg (moon at 154.0deg phase=0.30 elev=-42.0 )
AL_20141226_004244168_000003_32384701    11 stars filter C [91111934.2s - 91112114.2s] expo=180s elev=66.6deg humid= 50% sunelev=-65.3deg (moon at 154.0deg phase=0.30 elev=-43.0 )
AL_20141226_004554918_000003_32384701    12 stars filter C [91112125.0s - 91112305.0s] expo=180s elev=67.1deg humid= 50% sunelev=-64.9deg (moon at 154.0deg phase=0.30 elev=-43.0 )
AL_20141226_004905653_000003_32384701     8 stars filter R [91112315.7s - 91112495.7s] expo=180s elev=67.7deg humid= 50% sunelev=-64.5deg (moon at 154.0deg phase=0.30 elev=-44.0 )
AL_20141226_005227043_000003_32384801    12 stars filter C [91112517.1s - 91112697.1s] expo=180s elev=68.3deg humid= 53% sunelev=-64.1deg (moon at 154.0deg phase=0.30 elev=-44.0 )
AL_20141226_005538048_000003_32384801    12 stars filter C [91112708.1s - 91112888.1s] expo=180s elev=68.8deg humid= 52% sunelev=-63.7deg (moon at 153.0deg phase=0.30 elev=-44.0 )
AL_20141226_005848595_000003_32384801     8 stars filter R [91112898.6s - 91113078.6s] expo=180s elev=69.4deg humid= 50% sunelev=-63.3deg (moon at 153.0deg phase=0.30 elev=-45.0 )
AL_20141226_010205330_000003_32384901    11 stars filter C [91113095.4s - 91113275.4s] expo=180s elev=69.9deg humid= 49% sunelev=-62.9deg (moon at 153.0deg phase=0.30 elev=-45.0 )
AL_20141226_010516030_000003_32384901    11 stars filter C [91113286.2s - 91113466.2s] expo=180s elev=70.4deg humid= 48% sunelev=-62.4deg (moon at 153.0deg phase=0.30 elev=-46.0 )
AL_20141226_010827546_000003_32384901     7 stars filter R [91113477.6s - 91113657.6s] expo=180s elev=71.0deg humid= 49% sunelev=-62.0deg (moon at 153.0deg phase=0.30 elev=-46.0 )
AL_20141226_011146389_000003_32385001    12 stars filter C [91113676.5s - 91113856.5s] expo=180s elev=71.5deg humid= 50% sunelev=-61.5deg (moon at 153.0deg phase=0.30 elev=-46.0 )
AL_20141226_011456933_000003_32385001    10 stars filter C [91113867.0s - 91114047.0s] expo=180s elev=72.0deg humid= 51% sunelev=-61.1deg (moon at 153.0deg phase=0.30 elev=-47.0 )
AL_20141226_011809089_000003_32385001     7 stars filter R [91114059.1s - 91114239.1s] expo=180s elev=72.5deg humid= 52% sunelev=-60.6deg (moon at 153.0deg phase=0.30 elev=-47.0 )
AL_20141226_012131152_000003_32385101    10 stars filter C [91114261.2s - 91114441.2s] expo=180s elev=73.1deg humid= 50% sunelev=-60.1deg (moon at 153.0deg phase=0.30 elev=-48.0 )
AL_20141226_015044678_000003_32385401    12 stars filter C [91116014.7s - 91116194.7s] expo=180s elev=77.2deg humid= 50% sunelev=-55.5deg (moon at 153.0deg phase=0.30 elev=-51.0 )
AL_20141226_015355912_000003_32385401    11 stars filter C [91116205.9s - 91116385.9s] expo=180s elev=77.6deg humid= 49% sunelev=-55.0deg (moon at 153.0deg phase=0.30 elev=-51.0 )
AL_20141226_015706535_000003_32385401     8 stars filter R [91116396.5s - 91116576.5s] expo=180s elev=77.9deg humid= 49% sunelev=-54.5deg (moon at 153.0deg phase=0.30 elev=-51.0 )
AL_20141226_020029082_000003_32385501     8 stars filter C [91116596.9s - 91116776.9s] expo=180s elev=78.3deg humid= 49% sunelev=-53.9deg (moon at 153.0deg phase=0.30 elev=-51.0 )
AL_20141226_020340269_000003_32385501    13 stars filter C [91116790.3s - 91116970.3s] expo=180s elev=78.6deg humid= 48% sunelev=-53.4deg (moon at 153.0deg phase=0.30 elev=-52.0 )
AL_20141226_020651482_000003_32385501    10 stars filter R [91116981.5s - 91117161.5s] expo=180s elev=78.9deg humid= 49% sunelev=-52.8deg (moon at 153.0deg phase=0.30 elev=-52.0 )
AL_20141226_021010529_000003_32385601     8 stars filter C [91117180.3s - 91117360.3s] expo=180s elev=79.1deg humid= 48% sunelev=-52.3deg (moon at 153.0deg phase=0.30 elev=-52.0 )
AL_20141226_021321482_000003_32385601    11 stars filter C [91117371.6s - 91117551.6s] expo=180s elev=79.4deg humid= 48% sunelev=-51.7deg (moon at 153.0deg phase=0.30 elev=-52.0 )
AL_20141226_021632998_000003_32385601     7 stars filter R [91117563.0s - 91117743.0s] expo=180s elev=79.5deg humid= 48% sunelev=-51.2deg (moon at 153.0deg phase=0.30 elev=-53.0 )
AL_20141226_022003904_000003_32385701    11 stars filter C [91117773.7s - 91117953.7s] expo=180s elev=79.7deg humid= 47% sunelev=-50.6deg (moon at 153.0deg phase=0.30 elev=-53.0 )
AL_20141226_022315498_000003_32385701    11 stars filter C [91117965.4s - 91118145.4s] expo=180s elev=79.8deg humid= 47% sunelev=-50.0deg (moon at 153.0deg phase=0.30 elev=-53.0 )
AL_20141226_022626664_000003_32385701     7 stars filter R [91118156.6s - 91118336.6s] expo=180s elev=79.9deg humid= 49% sunelev=-49.5deg (moon at 153.0deg phase=0.30 elev=-53.0 )
AL_20141226_022942117_000003_32385801    11 stars filter C [91118352.2s - 91118532.2s] expo=180s elev=80.0deg humid= 53% sunelev=-48.9deg (moon at 153.0deg phase=0.30 elev=-53.0 )
AL_20141226_023253132_000003_32385801     8 stars filter C [91118543.2s - 91118723.2s] expo=180s elev=80.0deg humid= 56% sunelev=-48.3deg (moon at 153.0deg phase=0.30 elev=-54.0 )
AL_20141226_023605671_000003_32385801     7 stars filter R [91118735.8s - 91118915.8s] expo=180s elev=79.9deg humid= 55% sunelev=-47.8deg (moon at 153.0deg phase=0.30 elev=-54.0 )
AL_20141226_023931296_000003_32385901    10 stars filter C [91118941.4s - 91119121.4s] expo=180s elev=79.9deg humid= 53% sunelev=-47.2deg (moon at 153.0deg phase=0.30 elev=-54.0 )
AL_20141226_024241812_000003_32385901    12 stars filter C [91119131.9s - 91119311.9s] expo=180s elev=79.8deg humid= 57% sunelev=-46.6deg (moon at 153.0deg phase=0.30 elev=-54.0 )
AL_20141226_024552376_000003_32385901     7 stars filter R [91119322.4s - 91119502.4s] expo=180s elev=79.6deg humid= 63% sunelev=-46.1deg (moon at 153.0deg phase=0.30 elev=-54.0 )
AL_20141226_025049048_000003_32386101     0 star  filter C [91119784.7s - 91119964.7s] expo=180s elev=79.1deg humid= 74% sunelev=-44.7deg (moon at 153.0deg phase=0.30 elev=-54.0 )
AL_20141226_033705001_000003_32386401    13 stars filter C [91122395.0s - 91122575.0s] expo=180s elev=73.8deg humid= 79% sunelev=-36.9deg (moon at 152.0deg phase=0.31 elev=-54.0 )
AL_20141226_034016126_000003_32386401     8 stars filter R [91122586.3s - 91122766.3s] expo=180s elev=73.3deg humid= 77% sunelev=-36.3deg (moon at 152.0deg phase=0.31 elev=-54.0 )
AL_20141226_034326517_000003_32386401     6 stars filter V [91122776.5s - 91122956.5s] expo=180s elev=72.8deg humid= 79% sunelev=-35.7deg (moon at 152.0deg phase=0.31 elev=-54.0 )
AL_20141226_040129932_000003_32386501     8 stars filter C [91123860.0s - 91124040.0s] expo=180s elev=69.9deg humid= 76% sunelev=-32.5deg (moon at 152.0deg phase=0.31 elev=-53.0 )
AL_20141226_040441120_000003_32386501     8 stars filter R [91124051.2s - 91124231.2s] expo=180s elev=69.4deg humid= 78% sunelev=-31.9deg (moon at 152.0deg phase=0.31 elev=-53.0 )
AL_20141226_040751928_000003_32386501     6 stars filter V [91124242.0s - 91124422.0s] expo=180s elev=68.8deg humid= 78% sunelev=-31.3deg (moon at 152.0deg phase=0.31 elev=-53.0 )
AL_20141226_060358711_000003_32387001     2 stars filter C [91131208.7s - 91131388.7s] expo=180s elev=48.1deg humid= 93% sunelev=-11.0deg (moon at 151.0deg phase=0.32 elev=-40.0 )
AL_20141226_060709633_000003_32387001     2 stars filter R [91131399.7s - 91131579.7s] expo=180s elev=47.5deg humid= 93% sunelev=-10.4deg (moon at 151.0deg phase=0.32 elev=-39.0 )
AL_20141226_061020225_000003_32387001     2 stars filter V [91131590.2s - 91131770.2s] expo=180s elev=46.9deg humid= 93% sunelev=-9.9deg (moon at 151.0deg phase=0.32 elev=-39.0 )
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=71121:71230 y=113263:113372 (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=190.868647296 lat=43.4109373942
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.017
Assuming Rv=3.1: Av=0.057 Ar=0.046 Ai=0.033
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 99 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
GRBlog
ROTSE last GRB images

Example of a GCNC email for this burst

gcncirc@capella.gsfc.nasa.gov
GRB 141225: 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 141225 detected by SWIFT
(trigger 513505) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 91106518.6s after the GRB trigger
(91106497.5s after the notice). The elevation of the field increased from
50 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 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+91106518.6s to t0+91106608.6s : R > 15.1

The second image is 90.0s exposure in tracking mode:
t0+91106619.6s to t0+91106709.6s : R > 16.2

We co-added a series of exposures:
t0+91106619.6s to t0+91107237.2s : 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 91106518.6s 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=190.8686 lat=+43.4109
and the galactic extinction in R band is 0.0 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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