GRB151215_030129_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20151215_030305638_000000_00000001     0 star  filter C [   31.6s -    91.6s] expo= 60s elev=56.9deg humid= 91% sunelev=-41.5deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_030351044_000000_00000001    17 stars filter C [  106.9s -   136.9s] expo= 30s elev=56.7deg humid= 92% sunelev=-41.3deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_030431779_000000_00000001    19 stars filter C [  147.7s -   177.7s] expo= 30s elev=56.6deg humid= 92% sunelev=-41.2deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_030513013_000000_00000001    17 stars filter C [  188.9s -   218.9s] expo= 30s elev=56.5deg humid= 92% sunelev=-41.1deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_030553935_000000_00000001    16 stars filter C [  229.9s -   259.9s] expo= 30s elev=56.3deg humid= 92% sunelev=-41.0deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_030635873_000000_00000001    20 stars filter C [  271.8s -   301.8s] expo= 30s elev=56.2deg humid= 92% sunelev=-40.8deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_030817998_000000_00000001    26 stars filter C [  313.9s -   403.9s] expo= 90s elev=56.0deg humid= 92% sunelev=-40.7deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_030928232_000000_00000001     0 star  filter C [  415.2s -   505.2s] expo= 90s elev=55.7deg humid= 92% sunelev=-40.4deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_031517190_000000_04322701    23 stars filter C [  733.1s -   823.1s] expo= 90s elev=54.7deg humid= 91% sunelev=-39.4deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_031657721_000000_04322701    22 stars filter C [  833.6s -   923.6s] expo= 90s elev=54.4deg humid= 91% sunelev=-39.1deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_031838424_000000_04322701    22 stars filter C [  934.4s -  1024.4s] expo= 90s elev=54.1deg humid= 91% sunelev=-38.8deg (moon at 142.0deg phase=0.25 elev=-60.0 )
AL_20151215_032031487_000000_04322801    22 stars filter C [ 1047.4s -  1137.4s] expo= 90s elev=53.8deg humid= 91% sunelev=-38.5deg (moon at 142.0deg phase=0.25 elev=-59.0 )
AL_20151215_032059534_000000_04322801     0 star  filter C [ 1148.4s -  1238.4s] expo= 90s elev=53.5deg humid= 91% sunelev=-38.2deg (moon at 142.0deg phase=0.25 elev=-59.0 )
AL_20151215_032554544_000000_04322901    24 stars filter C [ 1370.5s -  1460.5s] expo= 90s elev=52.8deg humid= 91% sunelev=-37.5deg (moon at 142.0deg phase=0.25 elev=-59.0 )
AL_20151215_032735513_000000_04322901    23 stars filter C [ 1471.4s -  1561.4s] expo= 90s elev=52.5deg humid= 91% sunelev=-37.2deg (moon at 141.0deg phase=0.25 elev=-59.0 )
AL_20151215_032917185_000000_04322901    24 stars filter C [ 1573.1s -  1663.1s] expo= 90s elev=52.2deg humid= 91% sunelev=-36.9deg (moon at 141.0deg phase=0.25 elev=-59.0 )
AL_20151215_033332373_000000_04323001    24 stars filter C [ 1738.4s -  1918.4s] expo=180s elev=51.6deg humid= 91% sunelev=-36.4deg (moon at 141.0deg phase=0.25 elev=-59.0 )
AL_20151215_033643186_000000_04323001    26 stars filter C [ 1929.1s -  2109.1s] expo=180s elev=51.0deg humid= 90% sunelev=-35.9deg (moon at 141.0deg phase=0.25 elev=-58.0 )
AL_20151215_033954405_000000_04323001    25 stars filter R [ 2120.3s -  2300.3s] expo=180s elev=50.4deg humid= 90% sunelev=-35.3deg (moon at 141.0deg phase=0.25 elev=-58.0 )
AL_20151215_034325280_000000_04323101    25 stars filter C [ 2331.3s -  2511.3s] expo=180s elev=49.8deg humid= 90% sunelev=-34.6deg (moon at 141.0deg phase=0.25 elev=-58.0 )
AL_20151215_034636309_000000_04323101    25 stars filter C [ 2522.2s -  2702.2s] expo=180s elev=49.2deg humid= 89% sunelev=-34.1deg (moon at 141.0deg phase=0.25 elev=-57.0 )
AL_20151215_034947262_000000_04323101    23 stars filter R [ 2713.2s -  2893.2s] expo=180s elev=48.7deg humid= 90% sunelev=-33.5deg (moon at 141.0deg phase=0.25 elev=-57.0 )
AL_20151215_035303372_000000_04323201    24 stars filter C [ 2909.3s -  3089.3s] expo=180s elev=48.1deg humid= 89% sunelev=-32.9deg (moon at 141.0deg phase=0.25 elev=-57.0 )
AL_20151215_035613873_000000_04323201    24 stars filter C [ 3099.8s -  3279.8s] expo=180s elev=47.5deg humid= 89% sunelev=-32.3deg (moon at 141.0deg phase=0.25 elev=-56.0 )
AL_20151215_035925154_000000_04323201    22 stars filter R [ 3291.0s -  3471.0s] expo=180s elev=46.9deg humid= 88% sunelev=-31.8deg (moon at 141.0deg phase=0.25 elev=-56.0 )
AL_20151215_040244858_000000_04323301    25 stars filter C [ 3490.8s -  3670.8s] expo=180s elev=46.3deg humid= 88% sunelev=-31.2deg (moon at 141.0deg phase=0.25 elev=-56.0 )
AL_20151215_040555654_000000_04323301    24 stars filter C [ 3681.6s -  3861.6s] expo=180s elev=45.8deg humid= 88% sunelev=-30.6deg (moon at 141.0deg phase=0.25 elev=-55.0 )
AL_20151215_040906154_000000_04323301    25 stars filter R [ 3872.1s -  4052.1s] expo=180s elev=45.2deg humid= 88% sunelev=-30.0deg (moon at 141.0deg phase=0.26 elev=-55.0 )
AL_20151215_041237779_000000_04323401    25 stars filter C [ 4083.7s -  4263.7s] expo=180s elev=44.6deg humid= 88% sunelev=-29.4deg (moon at 141.0deg phase=0.26 elev=-55.0 )
AL_20151215_041549230_000000_04323401    23 stars filter C [ 4275.2s -  4455.2s] expo=180s elev=44.0deg humid= 88% sunelev=-28.8deg (moon at 141.0deg phase=0.26 elev=-54.0 )
AL_20151215_041900230_000000_04323401    23 stars filter R [ 4466.1s -  4646.1s] expo=180s elev=43.4deg humid= 88% sunelev=-28.2deg (moon at 141.0deg phase=0.26 elev=-54.0 )
AL_20151215_042216074_000000_04323501    23 stars filter C [ 4662.0s -  4842.0s] expo=180s elev=42.9deg humid= 87% sunelev=-27.7deg (moon at 141.0deg phase=0.26 elev=-54.0 )
AL_20151215_042527070_000000_04323501    24 stars filter C [ 4853.0s -  5033.0s] expo=180s elev=42.3deg humid= 87% sunelev=-27.1deg (moon at 141.0deg phase=0.26 elev=-53.0 )
AL_20151215_042838476_000000_04323501    19 stars filter R [ 5044.4s -  5224.4s] expo=180s elev=41.7deg humid= 87% sunelev=-26.5deg (moon at 141.0deg phase=0.26 elev=-53.0 )
AL_20151215_043157101_000000_04323601    19 stars filter C [ 5243.1s -  5423.1s] expo=180s elev=41.2deg humid= 87% sunelev=-25.9deg (moon at 141.0deg phase=0.26 elev=-52.0 )
AL_20151215_043508075_000000_04323601    22 stars filter C [ 5434.0s -  5614.0s] expo=180s elev=40.6deg humid= 87% sunelev=-25.3deg (moon at 141.0deg phase=0.26 elev=-52.0 )
AL_20151215_043819122_000000_04323601    16 stars filter R [ 5625.0s -  5805.0s] expo=180s elev=40.0deg humid= 87% sunelev=-24.8deg (moon at 141.0deg phase=0.26 elev=-51.0 )
AL_20151215_044141450_000000_04323701    20 stars filter C [ 5827.4s -  6007.4s] expo=180s elev=39.4deg humid= 88% sunelev=-24.2deg (moon at 141.0deg phase=0.26 elev=-51.0 )
AL_20151215_044452183_000000_04323701    20 stars filter C [ 6018.1s -  6198.1s] expo=180s elev=38.9deg humid= 88% sunelev=-23.6deg (moon at 141.0deg phase=0.26 elev=-51.0 )
AL_20151215_044803371_000000_04323701    15 stars filter R [ 6209.3s -  6389.3s] expo=180s elev=38.3deg humid= 88% sunelev=-23.0deg (moon at 141.0deg phase=0.26 elev=-50.0 )
AL_20151215_045125043_000000_04323801    23 stars filter C [ 6411.0s -  6591.0s] expo=180s elev=37.7deg humid= 88% sunelev=-22.5deg (moon at 141.0deg phase=0.26 elev=-50.0 )
AL_20151215_045435574_000000_04323801    20 stars filter C [ 6601.5s -  6781.5s] expo=180s elev=37.2deg humid= 88% sunelev=-21.9deg (moon at 141.0deg phase=0.26 elev=-49.0 )
AL_20151215_045746331_000000_04323801    17 stars filter R [ 6792.2s -  6972.2s] expo=180s elev=36.6deg humid= 88% sunelev=-21.3deg (moon at 141.0deg phase=0.26 elev=-49.0 )
AL_20151215_050117940_000000_04323901    16 stars filter C [ 7003.9s -  7183.9s] expo=180s elev=36.0deg humid= 89% sunelev=-20.7deg (moon at 141.0deg phase=0.26 elev=-48.0 )
AL_20151215_050429159_000000_04323901    15 stars filter C [ 7195.1s -  7375.1s] expo=180s elev=35.5deg humid= 89% sunelev=-20.1deg (moon at 141.0deg phase=0.26 elev=-48.0 )
AL_20151215_050740183_000000_04323901    12 stars filter R [ 7386.1s -  7566.1s] expo=180s elev=34.9deg humid= 89% sunelev=-19.6deg (moon at 140.0deg phase=0.26 elev=-47.0 )
AL_20151215_051056433_000000_04324001    11 stars filter C [ 7582.4s -  7762.4s] expo=180s elev=34.4deg humid= 90% sunelev=-19.0deg (moon at 140.0deg phase=0.26 elev=-47.0 )
AL_20151215_051407433_000000_04324001     9 stars filter C [ 7773.4s -  7953.4s] expo=180s elev=33.8deg humid= 90% sunelev=-18.5deg (moon at 140.0deg phase=0.26 elev=-46.0 )
AL_20151215_051718192_000000_04324001     6 stars filter R [ 7964.1s -  8144.1s] expo=180s elev=33.3deg humid= 89% sunelev=-17.9deg (moon at 140.0deg phase=0.26 elev=-46.0 )
AL_20151215_052037051_000000_04324101     8 stars filter C [ 8163.0s -  8343.0s] expo=180s elev=32.7deg humid= 88% sunelev=-17.3deg (moon at 140.0deg phase=0.26 elev=-45.0 )
AL_20151215_052348504_000000_04324101     6 stars filter C [ 8354.4s -  8534.4s] expo=180s elev=32.2deg humid= 87% sunelev=-16.8deg (moon at 140.0deg phase=0.26 elev=-45.0 )
AL_20151215_052700381_000000_04324101     2 stars filter R [ 8546.3s -  8726.3s] expo=180s elev=31.6deg humid= 87% sunelev=-16.2deg (moon at 140.0deg phase=0.26 elev=-44.0 )
AL_20151215_053021616_000000_04324201     2 stars filter C [ 8747.5s -  8927.5s] expo=180s elev=31.1deg humid= 87% sunelev=-15.6deg (moon at 140.0deg phase=0.26 elev=-44.0 )
AL_20151215_053332334_000000_04324201     2 stars filter C [ 8938.3s -  9118.3s] expo=180s elev=30.5deg humid= 86% sunelev=-15.1deg (moon at 140.0deg phase=0.26 elev=-43.0 )
AL_20151215_053643753_000000_04324201     2 stars filter R [ 9129.7s -  9309.7s] expo=180s elev=30.0deg humid= 87% sunelev=-14.6deg (moon at 140.0deg phase=0.26 elev=-43.0 )
AL_20151215_054005940_000000_04324301     2 stars filter C [ 9331.8s -  9511.8s] expo=180s elev=29.4deg humid= 87% sunelev=-14.0deg (moon at 140.0deg phase=0.26 elev=-42.0 )
AL_20151215_054317112_000000_04324301     1 star  filter C [ 9523.1s -  9703.1s] expo=180s elev=28.9deg humid= 88% sunelev=-13.4deg (moon at 140.0deg phase=0.26 elev=-42.0 )
AL_20151215_054628582_000000_04324301     1 star  filter R [ 9714.5s -  9894.5s] expo=180s elev=28.4deg humid= 88% sunelev=-12.9deg (moon at 140.0deg phase=0.26 elev=-41.0 )
AL_20151215_054949535_000000_04324401     1 star  filter C [ 9915.4s - 10095.4s] expo=180s elev=27.8deg humid= 88% sunelev=-12.3deg (moon at 140.0deg phase=0.26 elev=-41.0 )
AL_20151215_055301207_000000_04324401     1 star  filter C [10107.1s - 10287.1s] expo=180s elev=27.3deg humid= 88% sunelev=-11.8deg (moon at 140.0deg phase=0.26 elev=-40.0 )
AL_20151215_055612408_000000_04324401     0 star  filter R [10298.3s - 10478.3s] expo=180s elev=26.8deg humid= 88% sunelev=-11.2deg (moon at 140.0deg phase=0.26 elev=-40.0 )
AL_20151215_055934033_000000_04324501     2 stars filter C [10500.0s - 10680.0s] expo=180s elev=26.2deg humid= 89% sunelev=-10.7deg (moon at 140.0deg phase=0.26 elev=-39.0 )
AL_20151215_060255002_000000_04324501     1 star  filter C [10701.0s - 10881.0s] expo=180s elev=25.7deg humid= 89% sunelev=-10.1deg (moon at 140.0deg phase=0.26 elev=-39.0 )
AL_20151215_060616688_000000_04324501     2 stars filter R [10902.6s - 11082.6s] expo=180s elev=25.1deg humid= 90% sunelev=-9.6deg (moon at 140.0deg phase=0.26 elev=-38.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457371.62603 2015-12-15T03:01:28.992
Decoded useful notice informations.
RA(J2000.0) : 93.584 06h14m20s1
DEC(J2000.0) : 35.5159 +35d30m57s23
Error radius : 2.2 arcsec
Error box : x=74:75 y=72:73 (pixels)

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=177.260463544 lat=8.52355297266
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.395
Assuming Rv=3.1: Av=1.309 Ar=1.056 Ai=0.766
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 59 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 151215: TAROT Calern observatory optical observations
----------------------------------------------------------------------
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 151215 detected by SWIFT
(trigger 667392) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 31.6s after the GRB trigger
(17.7s after the notice). The elevation of the field decreased from
56 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-12-15T03:01:28.992

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+31.6s to t0+91.6s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+106.9s to t0+136.9s : R > 16.2

We co-added a series of exposures:
t0+106.9s to t0+403.9s : 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 31.6s 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=177.2605 lat= +8.5236
and the galactic extinction in R band is 1.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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