GRB171102_152030_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20171102_171829386_000000_93057801     0 star  filter C [ 6894.7s -  7074.7s] expo=180s elev=63.1deg humid= 69% sunelev=-10.3deg (moon at  91.0deg phase=0.89 elev=+14.0 )
AL_20171102_172139730_000000_93057801    20 stars filter C [ 7085.0s -  7265.0s] expo=180s elev=62.7deg humid= 70% sunelev=-10.9deg (moon at  91.0deg phase=0.89 elev=+15.0 )
AL_20171102_172450417_000000_93057801    13 stars filter C [ 7275.7s -  7455.7s] expo=180s elev=62.2deg humid= 73% sunelev=-11.5deg (moon at  91.0deg phase=0.89 elev=+15.0 )
AL_20171102_172822752_000000_93057901     0 star  filter C [ 7488.1s -  7668.1s] expo=180s elev=61.8deg humid= 73% sunelev=-12.1deg (moon at  91.0deg phase=0.89 elev=+16.0 )
AL_20171102_173133049_000000_93057901    31 stars filter C [ 7678.3s -  7858.3s] expo=180s elev=61.3deg humid= 72% sunelev=-12.6deg (moon at  91.0deg phase=0.89 elev=+17.0 )
AL_20171102_173443565_000000_93057901    23 stars filter C [ 7868.9s -  8048.9s] expo=180s elev=60.9deg humid= 72% sunelev=-13.2deg (moon at  91.0deg phase=0.89 elev=+17.0 )
AL_20171102_173758248_000000_93058001    11 stars filter C [ 8063.6s -  8243.6s] expo=180s elev=60.4deg humid= 72% sunelev=-13.8deg (moon at  91.0deg phase=0.89 elev=+18.0 )
AL_20171102_174108514_000000_93058001     0 star  filter C [ 8253.8s -  8433.8s] expo=180s elev=60.0deg humid= 70% sunelev=-14.4deg (moon at  91.0deg phase=0.89 elev=+18.0 )
AL_20171102_174419029_000000_93058001    22 stars filter C [ 8444.4s -  8624.4s] expo=180s elev=59.5deg humid= 68% sunelev=-14.9deg (moon at  91.0deg phase=0.89 elev=+19.0 )
AL_20171102_174751130_000000_93058101    22 stars filter C [ 8656.5s -  8836.5s] expo=180s elev=59.0deg humid= 65% sunelev=-15.6deg (moon at  91.0deg phase=0.89 elev=+19.0 )
AL_20171102_175101645_000000_93058101    24 stars filter C [ 8847.0s -  9027.0s] expo=180s elev=58.5deg humid= 66% sunelev=-16.1deg (moon at  91.0deg phase=0.89 elev=+20.0 )
AL_20171102_175412677_000000_93058101    44 stars filter C [ 9038.0s -  9218.0s] expo=180s elev=58.0deg humid= 65% sunelev=-16.7deg (moon at  91.0deg phase=0.89 elev=+21.0 )
AL_20171102_175727132_000000_93058201    43 stars filter C [ 9232.4s -  9412.4s] expo=180s elev=57.5deg humid= 77% sunelev=-17.3deg (moon at  91.0deg phase=0.89 elev=+21.0 )
AL_20171102_180037616_000000_93058201    33 stars filter C [ 9422.9s -  9602.9s] expo=180s elev=57.0deg humid= 65% sunelev=-17.9deg (moon at  91.0deg phase=0.89 elev=+22.0 )
AL_20171102_180347913_000000_93058201    48 stars filter C [ 9613.2s -  9793.2s] expo=180s elev=56.5deg humid= 65% sunelev=-18.4deg (moon at  91.0deg phase=0.89 elev=+22.0 )
AL_20171102_180710032_000000_93058301    38 stars filter C [ 9815.3s -  9995.3s] expo=180s elev=56.0deg humid= 65% sunelev=-19.1deg (moon at  91.0deg phase=0.89 elev=+23.0 )
AL_20171102_181020985_000000_93058301    31 stars filter C [10006.3s - 10186.3s] expo=180s elev=55.5deg humid= 64% sunelev=-19.6deg (moon at  91.0deg phase=0.89 elev=+23.0 )
AL_20171102_181331766_000000_93058301    41 stars filter C [10197.1s - 10377.1s] expo=180s elev=55.0deg humid= 64% sunelev=-20.2deg (moon at  91.0deg phase=0.89 elev=+24.0 )
AL_20171102_181703141_000000_93058401    33 stars filter C [10408.5s - 10588.5s] expo=180s elev=54.4deg humid= 64% sunelev=-20.8deg (moon at  91.0deg phase=0.89 elev=+24.0 )
AL_20171102_182013442_000000_93058401    33 stars filter C [10598.7s - 10778.7s] expo=180s elev=53.9deg humid= 64% sunelev=-21.4deg (moon at  91.0deg phase=0.89 elev=+25.0 )
AL_20171102_182323504_000000_93058401    25 stars filter C [10788.8s - 10968.8s] expo=180s elev=53.4deg humid= 63% sunelev=-22.0deg (moon at  91.0deg phase=0.89 elev=+25.0 )
AL_20171102_182638192_000000_93058501     0 star  filter C [10983.5s - 11163.5s] expo=180s elev=52.8deg humid= 63% sunelev=-22.6deg (moon at  91.0deg phase=0.89 elev=+26.0 )
AL_20171102_182947994_000000_93058501     0 star  filter C [11173.3s - 11353.3s] expo=180s elev=52.3deg humid= 63% sunelev=-23.1deg (moon at  91.0deg phase=0.89 elev=+26.0 )
AL_20171102_183258275_000000_93058501    10 stars filter C [11363.6s - 11543.6s] expo=180s elev=51.8deg humid= 63% sunelev=-23.7deg (moon at  91.0deg phase=0.89 elev=+27.0 )
AL_20171102_183631087_000000_93058601    49 stars filter C [11576.4s - 11756.4s] expo=180s elev=51.2deg humid= 62% sunelev=-24.4deg (moon at  91.0deg phase=0.89 elev=+28.0 )
AL_20171102_183941345_000000_93058601    32 stars filter C [11766.7s - 11946.7s] expo=180s elev=50.6deg humid= 62% sunelev=-24.9deg (moon at  91.0deg phase=0.89 elev=+28.0 )
AL_20171102_184251329_000000_93058601     0 star  filter C [11956.7s - 12136.7s] expo=180s elev=50.1deg humid= 61% sunelev=-25.5deg (moon at  91.0deg phase=0.89 elev=+29.0 )
AL_20171102_184615126_000000_93058701     0 star  filter C [12160.5s - 12340.5s] expo=180s elev=49.5deg humid= 61% sunelev=-26.1deg (moon at  91.0deg phase=0.89 elev=+29.0 )
AL_20171102_184925454_000000_93058701     0 star  filter C [12350.7s - 12530.7s] expo=180s elev=48.9deg humid= 61% sunelev=-26.7deg (moon at  91.0deg phase=0.89 elev=+30.0 )
AL_20171102_185235517_000000_93058701     0 star  filter C [12540.8s - 12720.8s] expo=180s elev=48.4deg humid= 61% sunelev=-27.3deg (moon at  91.0deg phase=0.89 elev=+30.0 )
AL_20171102_185550392_000000_93058801    17 stars filter C [12735.7s - 12915.7s] expo=180s elev=47.8deg humid= 61% sunelev=-27.8deg (moon at  91.0deg phase=0.89 elev=+31.0 )
AL_20171102_185900271_000000_93058801    34 stars filter C [12925.5s - 13105.5s] expo=180s elev=47.3deg humid= 62% sunelev=-28.4deg (moon at  91.0deg phase=0.89 elev=+31.0 )
AL_20171102_190211005_000000_93058801    12 stars filter C [13116.3s - 13296.3s] expo=180s elev=46.7deg humid= 62% sunelev=-29.0deg (moon at  91.0deg phase=0.89 elev=+32.0 )
AL_20171102_190534240_000000_93058901    41 stars filter C [13319.6s - 13499.6s] expo=180s elev=46.1deg humid= 62% sunelev=-29.6deg (moon at  91.0deg phase=0.89 elev=+32.0 )
AL_20171102_190844543_000000_93058901    59 stars filter C [13509.8s - 13689.8s] expo=180s elev=45.6deg humid= 62% sunelev=-30.2deg (moon at  91.0deg phase=0.89 elev=+33.0 )
AL_20171102_191155027_000000_93058901    44 stars filter C [13700.4s - 13880.4s] expo=180s elev=45.0deg humid= 62% sunelev=-30.7deg (moon at  91.0deg phase=0.89 elev=+33.0 )
AL_20171102_191526949_000000_93059001    49 stars filter C [13912.2s - 14092.2s] expo=180s elev=44.4deg humid= 62% sunelev=-31.3deg (moon at  91.0deg phase=0.89 elev=+34.0 )
AL_20171102_191837412_000000_93059001    36 stars filter C [14102.7s - 14282.7s] expo=180s elev=43.8deg humid= 62% sunelev=-31.9deg (moon at  91.0deg phase=0.89 elev=+34.0 )
AL_20171102_192147771_000000_93059001    49 stars filter C [14293.0s - 14473.0s] expo=180s elev=43.2deg humid= 62% sunelev=-32.5deg (moon at  91.0deg phase=0.89 elev=+35.0 )
AL_20171102_192510974_000000_93059101    48 stars filter C [14496.3s - 14676.3s] expo=180s elev=42.6deg humid= 62% sunelev=-33.1deg (moon at  91.0deg phase=0.89 elev=+35.0 )
AL_20171102_192822208_000000_93059101    51 stars filter C [14687.5s - 14867.5s] expo=180s elev=42.1deg humid= 63% sunelev=-33.6deg (moon at  91.0deg phase=0.89 elev=+36.0 )
AL_20171102_193132248_000000_93059101    70 stars filter C [14877.6s - 15057.6s] expo=180s elev=41.5deg humid= 63% sunelev=-34.2deg (moon at  91.0deg phase=0.89 elev=+36.0 )
AL_20171102_193446420_000000_93059201    68 stars filter C [15071.8s - 15251.8s] expo=180s elev=40.9deg humid= 63% sunelev=-34.8deg (moon at  91.0deg phase=0.89 elev=+36.0 )
AL_20171102_193756545_000000_93059201    61 stars filter C [15261.9s - 15441.9s] expo=180s elev=40.4deg humid= 63% sunelev=-35.3deg (moon at  91.0deg phase=0.89 elev=+37.0 )
AL_20171102_194106841_000000_93059201    32 stars filter C [15452.1s - 15632.1s] expo=180s elev=39.8deg humid= 63% sunelev=-35.9deg (moon at  91.0deg phase=0.89 elev=+37.0 )
AL_20171102_195544995_000000_93059301    64 stars filter C [16330.3s - 16510.3s] expo=180s elev=37.1deg humid= 64% sunelev=-38.4deg (moon at  92.0deg phase=0.89 elev=+39.0 )
AL_20171102_195856406_000000_93059301    61 stars filter C [16521.7s - 16701.7s] expo=180s elev=36.6deg humid= 64% sunelev=-39.0deg (moon at  92.0deg phase=0.89 elev=+40.0 )
AL_20171102_200206438_000000_93059301    72 stars filter C [16711.8s - 16891.8s] expo=180s elev=36.0deg humid= 64% sunelev=-39.5deg (moon at  92.0deg phase=0.89 elev=+40.0 )
AL_20171102_202025359_000000_93059401    70 stars filter C [17810.7s - 17990.7s] expo=180s elev=32.7deg humid= 62% sunelev=-42.6deg (moon at  92.0deg phase=0.89 elev=+42.0 )
AL_20171102_202335687_000000_93059401    63 stars filter C [18001.0s - 18181.0s] expo=180s elev=32.1deg humid= 63% sunelev=-43.1deg (moon at  92.0deg phase=0.89 elev=+43.0 )
AL_20171102_202645921_000000_93059401    70 stars filter C [18191.2s - 18371.2s] expo=180s elev=31.5deg humid= 63% sunelev=-43.6deg (moon at  92.0deg phase=0.89 elev=+43.0 )
AL_20171102_204455687_000000_93059501    64 stars filter C [19281.0s - 19461.0s] expo=180s elev=28.3deg humid= 64% sunelev=-46.6deg (moon at  92.0deg phase=0.89 elev=+45.0 )
AL_20171102_204805734_000000_93059501    51 stars filter C [19471.1s - 19651.1s] expo=180s elev=27.7deg humid= 63% sunelev=-47.1deg (moon at  92.0deg phase=0.89 elev=+45.0 )
AL_20171102_205115575_000000_93059501    63 stars filter C [19660.9s - 19840.9s] expo=180s elev=27.1deg humid= 63% sunelev=-47.6deg (moon at  92.0deg phase=0.89 elev=+46.0 )
AL_20171102_210911167_000000_93059601    61 stars filter C [20736.5s - 20916.5s] expo=180s elev=23.9deg humid= 62% sunelev=-50.2deg (moon at  92.0deg phase=0.89 elev=+47.0 )
AL_20171102_211221468_000000_93059601    47 stars filter C [20926.8s - 21106.8s] expo=180s elev=23.3deg humid= 62% sunelev=-50.7deg (moon at  92.0deg phase=0.89 elev=+47.0 )
AL_20171102_211531781_000000_93059601    31 stars filter C [21117.1s - 21297.1s] expo=180s elev=22.8deg humid= 62% sunelev=-51.2deg (moon at  92.0deg phase=0.89 elev=+48.0 )
AL_20171102_213340179_000000_93059701    39 stars filter C [22205.5s - 22385.5s] expo=180s elev=19.6deg humid= 62% sunelev=-53.6deg (moon at  92.0deg phase=0.90 elev=+49.0 )
AL_20171102_213650429_000000_93059701    53 stars filter C [22395.8s - 22575.8s] expo=180s elev=19.0deg humid= 62% sunelev=-54.0deg (moon at  92.0deg phase=0.90 elev=+49.0 )
AL_20171102_214000757_000000_93059701    66 stars filter C [22586.1s - 22766.1s] expo=180s elev=18.4deg humid= 62% sunelev=-54.4deg (moon at  92.0deg phase=0.90 elev=+49.0 )
AL_20171102_215807348_000000_93059801    47 stars filter C [23672.7s - 23852.7s] expo=180s elev=15.3deg humid= 61% sunelev=-56.5deg (moon at  92.0deg phase=0.90 elev=+50.0 )
AL_20171102_220118007_000000_93059801    43 stars filter C [23862.9s - 24042.9s] expo=180s elev=14.7deg humid= 61% sunelev=-56.9deg (moon at  92.0deg phase=0.90 elev=+50.0 )
AL_20171102_220429773_000000_93059801    41 stars filter C [24055.1s - 24235.1s] expo=180s elev=14.2deg humid= 62% sunelev=-57.2deg (moon at  92.0deg phase=0.90 elev=+50.0 )
AL_20171102_222250361_000000_93059901    30 stars filter C [25155.7s - 25335.7s] expo=180s elev=11.1deg humid= 62% sunelev=-58.9deg (moon at  92.0deg phase=0.90 elev=+50.0 )
AL_20171102_222600220_000000_93059901    30 stars filter C [25345.5s - 25525.5s] expo=180s elev=10.5deg humid= 63% sunelev=-59.1deg (moon at  92.0deg phase=0.90 elev=+50.0 )
AL_20171102_222911423_000000_93059901    23 stars filter C [25536.7s - 25716.7s] expo=180s elev=10.0deg humid= 63% sunelev=-59.4deg (moon at  92.0deg phase=0.90 elev=+50.0 )
AL_20171102_224715940_000000_93060001    24 stars filter C [26621.3s - 26801.3s] expo=180s elev= 7.0deg humid= 63% sunelev=-60.5deg (moon at  92.0deg phase=0.90 elev=+49.0 )
AL_20171102_225026236_000000_93060001    24 stars filter C [26811.5s - 26991.5s] expo=180s elev= 6.5deg humid= 62% sunelev=-60.6deg (moon at  92.0deg phase=0.90 elev=+49.0 )
AL_20171102_225336285_000000_93060001    17 stars filter C [27001.6s - 27181.6s] expo=180s elev= 6.0deg humid= 61% sunelev=-60.7deg (moon at  92.0deg phase=0.90 elev=+49.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2458060.13923137 2017-11-02T15:20:29.590
Decoded useful notice informations.
RA(J2000.0) : 288.103 19h12m24s7
DEC(J2000.0) : 22.4378 +22d26m16s07
Error radius : 3.0 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=55.2699305273 lat=5.67366886465
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.754
Assuming Rv=3.1: Av=2.499 Ar=2.015 Ai=1.463
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 58 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 171102: 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 171102 detected by SWIFT
(trigger 785510) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 1.92h after the GRB trigger.
The elevation of the field decreased from
63 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2017-11-02T15:20:29.590

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+6894.7s to t0+7074.7s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+7085.0s to t0+7265.0s : R > 16.2

We co-added a series of exposures:
t0+7085.0s to t0+8243.6s : 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 1.92h 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= 55.2699 lat= +5.6737
and the galactic extinction in R band is 2.0 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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