GRB180102_154944_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20180102_170911902_000001_02860401     1 star  filter C [ 4582.5s -  4762.5s] expo=180s elev=16.8deg humid= 45% sunelev=-10.6deg (moon at  73.0deg phase=0.94 elev= +1.0 )
AL_20180102_171221934_000001_02860401     1 star  filter C [ 4772.6s -  4952.6s] expo=180s elev=16.7deg humid= 44% sunelev=-11.2deg (moon at  73.0deg phase=0.94 elev= +2.0 )
AL_20180102_171532496_000001_02860401     1 star  filter C [ 4963.1s -  5143.1s] expo=180s elev=16.6deg humid= 45% sunelev=-11.7deg (moon at  73.0deg phase=0.94 elev= +2.0 )
AL_20180102_171901746_000001_02860501     1 star  filter C [ 5172.4s -  5352.4s] expo=180s elev=16.5deg humid= 45% sunelev=-12.3deg (moon at  73.0deg phase=0.94 elev= +3.0 )
AL_20180102_172211852_000001_02860501     1 star  filter C [ 5362.5s -  5542.5s] expo=180s elev=16.4deg humid= 46% sunelev=-12.8deg (moon at  73.0deg phase=0.94 elev= +3.0 )
AL_20180102_172522305_000001_02860501     1 star  filter C [ 5553.0s -  5733.0s] expo=180s elev=16.4deg humid= 45% sunelev=-13.4deg (moon at  73.0deg phase=0.94 elev= +4.0 )
AL_20180102_172849071_000003_77434901     0 star  filter C [ 5759.7s -  5939.7s] expo=180s elev=16.3deg humid= 46% sunelev=-14.0deg (moon at  73.0deg phase=0.94 elev= +4.0 )
AL_20180102_173159410_000003_77434901     1 star  filter C [ 5950.0s -  6130.0s] expo=180s elev=16.3deg humid= 47% sunelev=-14.5deg (moon at  73.0deg phase=0.94 elev= +5.0 )
AL_20180102_173510566_000003_77434901     1 star  filter C [ 6141.2s -  6321.2s] expo=180s elev=16.2deg humid= 48% sunelev=-15.0deg (moon at  73.0deg phase=0.94 elev= +5.0 )
AL_20180102_173829019_000001_02860701     1 star  filter C [ 6339.6s -  6519.6s] expo=180s elev=16.2deg humid= 48% sunelev=-15.6deg (moon at  73.0deg phase=0.94 elev= +6.0 )
AL_20180102_174138830_000001_02860701     1 star  filter C [ 6529.4s -  6709.4s] expo=180s elev=16.1deg humid= 49% sunelev=-16.2deg (moon at  73.0deg phase=0.94 elev= +6.0 )
AL_20180102_174449095_000001_02860701     1 star  filter C [ 6719.7s -  6899.7s] expo=180s elev=16.1deg humid= 48% sunelev=-16.7deg (moon at  73.0deg phase=0.94 elev= +7.0 )
AL_20180102_174816767_000001_02860801     1 star  filter C [ 6927.4s -  7107.4s] expo=180s elev=16.0deg humid= 49% sunelev=-17.3deg (moon at  73.0deg phase=0.94 elev= +7.0 )
AL_20180102_175126595_000001_02860801     1 star  filter C [ 7117.2s -  7297.2s] expo=180s elev=16.0deg humid= 50% sunelev=-17.9deg (moon at  73.0deg phase=0.94 elev= +8.0 )
AL_20180102_175437113_000001_02860801     1 star  filter C [ 7307.7s -  7487.7s] expo=180s elev=16.0deg humid= 50% sunelev=-18.4deg (moon at  73.0deg phase=0.94 elev= +8.0 )
AL_20180102_175801082_000001_02860901     1 star  filter C [ 7511.7s -  7691.7s] expo=180s elev=15.9deg humid= 50% sunelev=-19.0deg (moon at  73.0deg phase=0.94 elev= +9.0 )
AL_20180102_180110894_000001_02860901     1 star  filter C [ 7701.5s -  7881.5s] expo=180s elev=15.9deg humid= 49% sunelev=-19.6deg (moon at  73.0deg phase=0.94 elev=+10.0 )
AL_20180102_180421466_000001_02860901     1 star  filter C [ 7892.1s -  8072.1s] expo=180s elev=15.9deg humid= 50% sunelev=-20.1deg (moon at  73.0deg phase=0.94 elev=+10.0 )
AL_20180102_180745622_000001_02861001     1 star  filter C [ 8096.3s -  8276.3s] expo=180s elev=15.9deg humid= 50% sunelev=-20.7deg (moon at  73.0deg phase=0.94 elev=+11.0 )
AL_20180102_181055919_000001_02861001     1 star  filter C [ 8286.5s -  8466.5s] expo=180s elev=15.9deg humid= 50% sunelev=-21.3deg (moon at  73.0deg phase=0.94 elev=+11.0 )
AL_20180102_181406405_000001_02861001     1 star  filter C [ 8477.1s -  8657.1s] expo=180s elev=15.9deg humid= 49% sunelev=-21.8deg (moon at  73.0deg phase=0.94 elev=+12.0 )
AL_20180102_181730358_000001_02861101     0 star  filter C [ 8681.0s -  8861.0s] expo=180s elev=15.9deg humid= 49% sunelev=-22.4deg (moon at  73.0deg phase=0.94 elev=+12.0 )
AL_20180102_182040889_000001_02861101     0 star  filter C [ 8871.6s -  9051.6s] expo=180s elev=15.9deg humid= 49% sunelev=-23.0deg (moon at  73.0deg phase=0.94 elev=+13.0 )
AL_20180102_182352136_000001_02861101     0 star  filter C [ 9062.8s -  9242.8s] expo=180s elev=15.9deg humid= 49% sunelev=-23.6deg (moon at  72.0deg phase=0.94 elev=+13.0 )
AL_20180102_182710261_000001_02861201     0 star  filter C [ 9260.9s -  9440.9s] expo=180s elev=15.9deg humid= 49% sunelev=-24.2deg (moon at  72.0deg phase=0.94 elev=+14.0 )
AL_20180102_183020839_000001_02861201     0 star  filter C [ 9451.5s -  9631.5s] expo=180s elev=15.9deg humid= 49% sunelev=-24.7deg (moon at  72.0deg phase=0.94 elev=+14.0 )
AL_20180102_183332062_000001_02861201     0 star  filter C [ 9642.7s -  9822.7s] expo=180s elev=15.9deg humid= 50% sunelev=-25.3deg (moon at  72.0deg phase=0.94 elev=+15.0 )
AL_20180102_183656702_000003_77435601     0 star  filter C [ 9847.3s - 10027.3s] expo=180s elev=15.9deg humid= 50% sunelev=-25.9deg (moon at  72.0deg phase=0.94 elev=+16.0 )
AL_20180102_184007030_000003_77435601     0 star  filter C [10037.6s - 10217.6s] expo=180s elev=16.0deg humid= 49% sunelev=-26.5deg (moon at  72.0deg phase=0.94 elev=+16.0 )
AL_20180102_184317307_000003_77435601     0 star  filter C [10227.9s - 10407.9s] expo=180s elev=16.0deg humid= 49% sunelev=-27.0deg (moon at  72.0deg phase=0.94 elev=+17.0 )
AL_20180102_184640760_000001_02861401     0 star  filter C [10431.4s - 10611.4s] expo=180s elev=16.0deg humid= 49% sunelev=-27.7deg (moon at  72.0deg phase=0.94 elev=+17.0 )
AL_20180102_184951307_000001_02861401     1 star  filter C [10621.9s - 10801.9s] expo=180s elev=16.1deg humid= 48% sunelev=-28.2deg (moon at  72.0deg phase=0.94 elev=+18.0 )
AL_20180102_185301837_000001_02861401     1 star  filter C [10812.4s - 10992.4s] expo=180s elev=16.1deg humid= 49% sunelev=-28.8deg (moon at  72.0deg phase=0.94 elev=+18.0 )
AL_20180102_185624899_000001_02861501     0 star  filter C [11015.5s - 11195.5s] expo=180s elev=16.1deg humid= 50% sunelev=-29.4deg (moon at  72.0deg phase=0.94 elev=+19.0 )
AL_20180102_185936337_000001_02861501     0 star  filter C [11206.9s - 11386.9s] expo=180s elev=16.2deg humid= 49% sunelev=-30.0deg (moon at  72.0deg phase=0.94 elev=+19.0 )
AL_20180102_190246809_000001_02861501     0 star  filter C [11397.5s - 11577.5s] expo=180s elev=16.3deg humid= 49% sunelev=-30.5deg (moon at  72.0deg phase=0.94 elev=+20.0 )
AL_20180102_190604981_000003_77435901     0 star  filter C [11595.6s - 11775.6s] expo=180s elev=16.3deg humid= 49% sunelev=-31.1deg (moon at  72.0deg phase=0.94 elev=+21.0 )
AL_20180102_190916028_000003_77435901     0 star  filter C [11786.6s - 11966.6s] expo=180s elev=16.4deg humid= 49% sunelev=-31.7deg (moon at  72.0deg phase=0.94 elev=+21.0 )
AL_20180102_191225856_000003_77435901     0 star  filter C [11976.4s - 12156.4s] expo=180s elev=16.4deg humid= 60% sunelev=-32.3deg (moon at  72.0deg phase=0.94 elev=+22.0 )
AL_20180102_191553271_000003_77436001     0 star  filter C [12183.9s - 12363.9s] expo=180s elev=16.5deg humid= 49% sunelev=-32.9deg (moon at  72.0deg phase=0.94 elev=+22.0 )
AL_20180102_191903771_000003_77436001     0 star  filter C [12374.4s - 12554.4s] expo=180s elev=16.6deg humid= 49% sunelev=-33.5deg (moon at  72.0deg phase=0.94 elev=+23.0 )
AL_20180102_192213646_000003_77436001     1 star  filter C [12564.2s - 12744.2s] expo=180s elev=16.7deg humid= 49% sunelev=-34.1deg (moon at  72.0deg phase=0.94 elev=+23.0 )
AL_20180102_192537171_000003_77436101     1 star  filter C [12767.7s - 12947.7s] expo=180s elev=16.7deg humid= 48% sunelev=-34.7deg (moon at  72.0deg phase=0.94 elev=+24.0 )
AL_20180102_192847155_000003_77436101     1 star  filter C [12957.8s - 13137.8s] expo=180s elev=16.8deg humid= 48% sunelev=-35.2deg (moon at  72.0deg phase=0.94 elev=+24.0 )
AL_20180102_193157484_000003_77436101     1 star  filter C [13148.1s - 13328.1s] expo=180s elev=16.9deg humid= 48% sunelev=-35.8deg (moon at  72.0deg phase=0.94 elev=+25.0 )
AL_20180102_193521414_000001_02861901     1 star  filter C [13352.0s - 13532.0s] expo=180s elev=17.0deg humid= 48% sunelev=-36.4deg (moon at  72.0deg phase=0.94 elev=+26.0 )
AL_20180102_193831461_000001_02861901     1 star  filter C [13542.1s - 13722.1s] expo=180s elev=17.1deg humid= 48% sunelev=-37.0deg (moon at  72.0deg phase=0.94 elev=+26.0 )
AL_20180102_194141976_000001_02861901     1 star  filter C [13732.6s - 13912.6s] expo=180s elev=17.2deg humid= 48% sunelev=-37.6deg (moon at  72.0deg phase=0.94 elev=+27.0 )
AL_20180102_194506018_000001_02862001     1 star  filter C [13936.6s - 14116.6s] expo=180s elev=17.3deg humid= 49% sunelev=-38.2deg (moon at  72.0deg phase=0.94 elev=+27.0 )
AL_20180102_194817221_000001_02862001     1 star  filter C [14127.8s - 14307.8s] expo=180s elev=17.4deg humid= 49% sunelev=-38.8deg (moon at  72.0deg phase=0.94 elev=+28.0 )
AL_20180102_195127675_000001_02862001     1 star  filter C [14318.3s - 14498.3s] expo=180s elev=17.5deg humid= 50% sunelev=-39.3deg (moon at  72.0deg phase=0.94 elev=+28.0 )
AL_20180102_195446033_000001_02862101     1 star  filter C [14516.7s - 14696.7s] expo=180s elev=17.7deg humid= 49% sunelev=-39.9deg (moon at  72.0deg phase=0.94 elev=+29.0 )
AL_20180102_195757096_000001_02862101     1 star  filter C [14707.7s - 14887.7s] expo=180s elev=17.8deg humid= 49% sunelev=-40.5deg (moon at  72.0deg phase=0.94 elev=+29.0 )
AL_20180102_200108065_000001_02862101     1 star  filter C [14898.7s - 15078.7s] expo=180s elev=17.9deg humid= 50% sunelev=-41.1deg (moon at  72.0deg phase=0.94 elev=+30.0 )
AL_20180102_200432997_000003_77436501     0 star  filter C [15103.6s - 15283.6s] expo=180s elev=18.0deg humid= 50% sunelev=-41.7deg (moon at  72.0deg phase=0.94 elev=+31.0 )
AL_20180102_200743497_000003_77436501     1 star  filter C [15294.1s - 15474.1s] expo=180s elev=18.2deg humid= 49% sunelev=-42.2deg (moon at  72.0deg phase=0.94 elev=+31.0 )
AL_20180102_201053309_000003_77436501     1 star  filter C [15483.9s - 15663.9s] expo=180s elev=18.3deg humid= 49% sunelev=-42.8deg (moon at  72.0deg phase=0.94 elev=+32.0 )
AL_20180102_202432888_000001_02862301     1 star  filter C [16303.5s - 16483.5s] expo=180s elev=18.9deg humid= 49% sunelev=-45.2deg (moon at  72.0deg phase=0.94 elev=+34.0 )
AL_20180102_202742732_000001_02862301     1 star  filter C [16493.3s - 16673.3s] expo=180s elev=19.1deg humid= 50% sunelev=-45.8deg (moon at  72.0deg phase=0.94 elev=+35.0 )
AL_20180102_203053013_000001_02862301     2 stars filter C [16683.6s - 16863.6s] expo=180s elev=19.2deg humid= 50% sunelev=-46.4deg (moon at  72.0deg phase=0.94 elev=+35.0 )
AL_20180102_204856593_000001_02862401     1 star  filter C [17767.2s - 17947.2s] expo=180s elev=20.2deg humid= 50% sunelev=-49.5deg (moon at  72.0deg phase=0.93 elev=+38.0 )
AL_20180102_205207577_000001_02862401     1 star  filter C [17958.2s - 18138.2s] expo=180s elev=20.3deg humid= 51% sunelev=-50.0deg (moon at  72.0deg phase=0.93 elev=+39.0 )
AL_20180102_205517816_000001_02862401     2 stars filter C [18148.5s - 18328.5s] expo=180s elev=20.5deg humid= 50% sunelev=-50.6deg (moon at  72.0deg phase=0.93 elev=+39.0 )
AL_20180102_211324206_000003_77436801     1 star  filter C [19234.8s - 19414.8s] expo=180s elev=21.6deg humid= 51% sunelev=-53.6deg (moon at  72.0deg phase=0.93 elev=+42.0 )
AL_20180102_211634259_000003_77436801     1 star  filter C [19424.9s - 19604.9s] expo=180s elev=21.8deg humid= 51% sunelev=-54.2deg (moon at  72.0deg phase=0.93 elev=+43.0 )
AL_20180102_211944556_000003_77436801     1 star  filter C [19615.1s - 19795.1s] expo=180s elev=22.0deg humid= 52% sunelev=-54.7deg (moon at  72.0deg phase=0.93 elev=+44.0 )
AL_20180102_213756913_000003_77436901     1 star  filter C [20707.5s - 20887.5s] expo=180s elev=23.3deg humid= 50% sunelev=-57.6deg (moon at  72.0deg phase=0.93 elev=+47.0 )
AL_20180102_214107476_000003_77436901     1 star  filter C [20898.1s - 21078.1s] expo=180s elev=23.5deg humid= 49% sunelev=-58.1deg (moon at  72.0deg phase=0.93 elev=+47.0 )
AL_20180102_214417523_000003_77436901     1 star  filter C [21088.1s - 21268.1s] expo=180s elev=23.7deg humid= 50% sunelev=-58.6deg (moon at  72.0deg phase=0.93 elev=+48.0 )
AL_20180102_220224601_000003_77437001     1 star  filter C [22175.2s - 22355.2s] expo=180s elev=25.1deg humid= 52% sunelev=-61.2deg (moon at  72.0deg phase=0.93 elev=+50.0 )
AL_20180102_220534882_000003_77437001     1 star  filter C [22365.5s - 22545.5s] expo=180s elev=25.3deg humid= 52% sunelev=-61.7deg (moon at  71.0deg phase=0.93 elev=+51.0 )
AL_20180102_220845582_000003_77437001     1 star  filter C [22556.2s - 22736.2s] expo=180s elev=25.6deg humid= 52% sunelev=-62.1deg (moon at  71.0deg phase=0.93 elev=+51.0 )
AL_20180102_222659940_000003_77437101     0 star  filter C [23650.6s - 23830.6s] expo=180s elev=27.1deg humid= 50% sunelev=-64.4deg (moon at  71.0deg phase=0.93 elev=+54.0 )
AL_20180102_223009753_000003_77437101     1 star  filter C [23840.4s - 24020.4s] expo=180s elev=27.3deg humid= 50% sunelev=-64.8deg (moon at  71.0deg phase=0.93 elev=+55.0 )
AL_20180102_223320081_000003_77437101     1 star  filter C [24030.7s - 24210.7s] expo=180s elev=27.6deg humid= 52% sunelev=-65.2deg (moon at  71.0deg phase=0.93 elev=+55.0 )
AL_20180102_225113922_000001_02862901     1 star  filter C [25104.5s - 25284.5s] expo=180s elev=29.2deg humid= 51% sunelev=-67.0deg (moon at  71.0deg phase=0.93 elev=+57.0 )
AL_20180102_225423954_000001_02862901     1 star  filter C [25294.6s - 25474.6s] expo=180s elev=29.5deg humid= 52% sunelev=-67.2deg (moon at  71.0deg phase=0.93 elev=+58.0 )
AL_20180102_225734525_000001_02862901     1 star  filter C [25485.1s - 25665.1s] expo=180s elev=29.8deg humid= 50% sunelev=-67.5deg (moon at  71.0deg phase=0.93 elev=+58.0 )
AL_20180102_231552119_000003_77437301     1 star  filter C [26582.8s - 26762.8s] expo=180s elev=31.5deg humid= 50% sunelev=-68.6deg (moon at  71.0deg phase=0.93 elev=+60.0 )
AL_20180102_231902654_000003_77437301     1 star  filter C [26773.3s - 26953.3s] expo=180s elev=31.8deg humid= 50% sunelev=-68.7deg (moon at  71.0deg phase=0.93 elev=+61.0 )
AL_20180102_232213217_000003_77437301     1 star  filter C [26963.8s - 27143.8s] expo=180s elev=32.1deg humid= 49% sunelev=-68.8deg (moon at  71.0deg phase=0.93 elev=+61.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2458121.15954039 2018-01-02T15:49:44.290
Decoded useful notice informations.
RA(J2000.0) : 203.1151 13h32m27s6
DEC(J2000.0) : 62.1481 +62d08m53s15
Error radius : 3.0 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=114.732658766 lat=54.3222802587
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.014
Assuming Rv=3.1: Av=0.047 Ar=0.038 Ai=0.028
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 127 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 180102: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A., Noysena.K., Atteia J.L. (CNRS-OMP-IRAP),
Boer, M., Eymar, L. (CNRS-ARTEMIS),
Gendre B. (UVI - Etelman Obs.) report:

We imaged the field of GRB 180102 detected by SWIFT
(trigger 802999) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 1.27h after the GRB trigger.
The elevation of the field decreased from
16 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2018-01-02T15:49:44.290

The first image is trailed with a duration of 180.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+4582.5s to t0+4762.5s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+4772.6s to t0+4952.6s : R > 16.2

We co-added a series of exposures:
t0+4772.6s to t0+5939.7s : 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 1.27h 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=114.7327 lat=+54.3223
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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