GRB110827_000235_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20110827_000355804_110827_00020     0 star  filter C [   58.4s -   118.4s] expo= 60s elev= 7.6deg humid= 80% sunelev=-35.5deg (moon at  48.0deg phase=0.16 elev=-22.0 )
AL_20110827_000440694_110827_00020     0 star  filter C [  133.4s -   163.4s] expo= 30s elev= 7.6deg humid= 79% sunelev=-35.5deg (moon at  48.0deg phase=0.16 elev=-22.0 )
AL_20110827_000521232_110827_00020     0 star  filter C [  173.9s -   203.9s] expo= 30s elev= 7.6deg humid= 79% sunelev=-35.4deg (moon at  48.0deg phase=0.16 elev=-22.0 )
AL_20110827_000601278_110827_00020     0 star  filter C [  213.9s -   243.9s] expo= 30s elev= 7.6deg humid= 79% sunelev=-35.4deg (moon at  48.0deg phase=0.16 elev=-22.0 )
AL_20110827_000641997_110827_00020     0 star  filter C [  254.6s -   284.6s] expo= 30s elev= 7.6deg humid= 79% sunelev=-35.4deg (moon at  48.0deg phase=0.16 elev=-22.0 )
AL_20110827_000722529_110827_00020     0 star  filter C [  295.2s -   325.2s] expo= 30s elev= 7.6deg humid= 79% sunelev=-35.4deg (moon at  48.0deg phase=0.16 elev=-22.0 )
AL_20110827_001419934_000002_14120201     0 star  filter C [  652.6s -   742.6s] expo= 90s elev= 7.6deg humid= 79% sunelev=-35.2deg (moon at  48.0deg phase=0.16 elev=-21.0 )
AL_20110827_001600473_000002_14120201     0 star  filter C [  753.1s -   843.1s] expo= 90s elev= 7.6deg humid= 80% sunelev=-35.1deg (moon at  48.0deg phase=0.16 elev=-21.0 )
AL_20110827_001741441_000002_14120201     0 star  filter R [  854.1s -   944.1s] expo= 90s elev= 7.6deg humid= 79% sunelev=-35.0deg (moon at  48.0deg phase=0.16 elev=-20.0 )
AL_20110827_001921941_000002_14120201     0 star  filter C [  954.6s -  1044.6s] expo= 90s elev= 7.6deg humid= 79% sunelev=-35.0deg (moon at  48.0deg phase=0.16 elev=-20.0 )
AL_20110827_002243442_000002_14120201     0 star  filter R [ 1156.1s -  1246.1s] expo= 90s elev= 7.6deg humid= 79% sunelev=-34.8deg (moon at  48.0deg phase=0.16 elev=-20.0 )
AL_20110827_002711962_000002_14120301     0 star  filter C [ 1424.6s -  1514.6s] expo= 90s elev= 7.7deg humid= 79% sunelev=-34.6deg (moon at  48.0deg phase=0.16 elev=-19.0 )
AL_20110827_002852697_000002_14120301     0 star  filter R [ 1525.4s -  1615.4s] expo= 90s elev= 7.7deg humid= 80% sunelev=-34.5deg (moon at  48.0deg phase=0.16 elev=-19.0 )
AL_20110827_003033650_000002_14120301     0 star  filter C [ 1626.3s -  1716.3s] expo= 90s elev= 7.7deg humid= 81% sunelev=-34.4deg (moon at  48.0deg phase=0.16 elev=-19.0 )
AL_20110827_003214430_000002_14120301     0 star  filter C [ 1727.1s -  1817.1s] expo= 90s elev= 7.7deg humid= 81% sunelev=-34.3deg (moon at  48.0deg phase=0.16 elev=-19.0 )
AL_20110827_003354711_000002_14120301     0 star  filter R [ 1827.3s -  1917.3s] expo= 90s elev= 7.7deg humid= 82% sunelev=-34.2deg (moon at  48.0deg phase=0.16 elev=-19.0 )
AL_20110827_004151420_000002_14120401     0 star  filter C [ 2214.1s -  2394.1s] expo=180s elev= 7.8deg humid= 83% sunelev=-33.9deg (moon at  48.0deg phase=0.16 elev=-18.0 )
AL_20110827_004501690_000002_14120401     0 star  filter C [ 2404.4s -  2584.4s] expo=180s elev= 7.9deg humid= 83% sunelev=-33.7deg (moon at  48.0deg phase=0.16 elev=-17.0 )
AL_20110827_004811973_000002_14120401     0 star  filter R [ 2594.6s -  2774.6s] expo=180s elev= 7.9deg humid= 83% sunelev=-33.5deg (moon at  48.0deg phase=0.16 elev=-17.0 )
AL_20110827_005122269_000002_14120401     0 star  filter C [ 2784.9s -  2964.9s] expo=180s elev= 8.0deg humid= 83% sunelev=-33.2deg (moon at  48.0deg phase=0.16 elev=-17.0 )
AL_20110827_005432285_000002_14120401     0 star  filter C [ 2975.0s -  3155.0s] expo=180s elev= 8.0deg humid= 84% sunelev=-33.0deg (moon at  48.0deg phase=0.16 elev=-16.0 )
AL_20110827_005742603_000002_14120401     0 star  filter R [ 3165.2s -  3345.2s] expo=180s elev= 8.1deg humid= 84% sunelev=-32.8deg (moon at  48.0deg phase=0.15 elev=-16.0 )
AL_20110827_010206385_000002_14120501     0 star  filter C [ 3429.0s -  3609.0s] expo=180s elev= 8.2deg humid= 83% sunelev=-32.5deg (moon at  48.0deg phase=0.15 elev=-15.0 )
AL_20110827_010517360_000002_14120501     0 star  filter C [ 3620.0s -  3800.0s] expo=180s elev= 8.3deg humid= 82% sunelev=-32.2deg (moon at  48.0deg phase=0.15 elev=-15.0 )
AL_20110827_010828110_000002_14120501     0 star  filter R [ 3810.8s -  3990.8s] expo=180s elev= 8.3deg humid= 81% sunelev=-32.0deg (moon at  48.0deg phase=0.15 elev=-14.0 )
AL_20110827_011138391_000002_14120501     0 star  filter C [ 4001.0s -  4181.0s] expo=180s elev= 8.4deg humid= 82% sunelev=-31.7deg (moon at  48.0deg phase=0.15 elev=-14.0 )
AL_20110827_011448422_000002_14120501     0 star  filter C [ 4191.1s -  4371.1s] expo=180s elev= 8.5deg humid= 81% sunelev=-31.4deg (moon at  48.0deg phase=0.15 elev=-13.0 )
AL_20110827_011759395_000002_14120501     0 star  filter R [ 4382.0s -  4562.0s] expo=180s elev= 8.6deg humid= 80% sunelev=-31.1deg (moon at  48.0deg phase=0.15 elev=-13.0 )
AL_20110827_012158380_000002_14120601     0 star  filter C [ 4621.0s -  4801.0s] expo=180s elev= 8.7deg humid= 78% sunelev=-30.8deg (moon at  48.0deg phase=0.15 elev=-12.0 )
AL_20110827_012508869_000002_14120601     0 star  filter C [ 4811.5s -  4991.5s] expo=180s elev= 8.9deg humid= 77% sunelev=-30.5deg (moon at  48.0deg phase=0.15 elev=-12.0 )
AL_20110827_012819165_000002_14120601     0 star  filter R [ 5001.8s -  5181.8s] expo=180s elev= 9.0deg humid= 76% sunelev=-30.2deg (moon at  48.0deg phase=0.15 elev=-12.0 )
AL_20110827_013129197_000002_14120601     0 star  filter C [ 5191.9s -  5371.9s] expo=180s elev= 9.1deg humid= 74% sunelev=-29.9deg (moon at  48.0deg phase=0.15 elev=-11.0 )
AL_20110827_013439276_000002_14120601     0 star  filter C [ 5381.9s -  5561.9s] expo=180s elev= 9.2deg humid= 71% sunelev=-29.5deg (moon at  48.0deg phase=0.15 elev=-11.0 )
AL_20110827_013750218_000002_14120601     0 star  filter R [ 5572.9s -  5752.9s] expo=180s elev= 9.3deg humid= 71% sunelev=-29.2deg (moon at  48.0deg phase=0.15 elev=-10.0 )
AL_20110827_014200826_000002_14120701     0 star  filter C [ 5823.5s -  6003.5s] expo=180s elev= 9.5deg humid= 70% sunelev=-28.8deg (moon at  48.0deg phase=0.15 elev=-10.0 )
AL_20110827_014511083_000002_14120701     0 star  filter C [ 6013.7s -  6193.7s] expo=180s elev= 9.6deg humid= 69% sunelev=-28.4deg (moon at  48.0deg phase=0.15 elev= -9.0 )
AL_20110827_014821114_000002_14120701     0 star  filter R [ 6203.8s -  6383.8s] expo=180s elev= 9.8deg humid= 70% sunelev=-28.1deg (moon at  48.0deg phase=0.15 elev= -9.0 )
AL_20110827_015131395_000002_14120701     0 star  filter C [ 6394.1s -  6574.1s] expo=180s elev= 9.9deg humid= 71% sunelev=-27.7deg (moon at  48.0deg phase=0.15 elev= -8.0 )
AL_20110827_015442160_000002_14120701     0 star  filter C [ 6584.8s -  6764.8s] expo=180s elev=10.1deg humid= 70% sunelev=-27.4deg (moon at  48.0deg phase=0.15 elev= -8.0 )
AL_20110827_015753118_000002_14120701     0 star  filter R [ 6775.8s -  6955.8s] expo=180s elev=10.2deg humid= 66% sunelev=-27.0deg (moon at  48.0deg phase=0.15 elev= -7.0 )
AL_20110827_020202571_000002_14120801     0 star  filter C [ 7025.2s -  7205.2s] expo=180s elev=10.4deg humid= 64% sunelev=-26.5deg (moon at  48.0deg phase=0.15 elev= -7.0 )
AL_20110827_020512843_000002_14120801     0 star  filter C [ 7215.5s -  7395.5s] expo=180s elev=10.6deg humid= 64% sunelev=-26.1deg (moon at  48.0deg phase=0.15 elev= -6.0 )
AL_20110827_020823796_000002_14120801     0 star  filter R [ 7406.4s -  7586.4s] expo=180s elev=10.7deg humid= 63% sunelev=-25.8deg (moon at  48.0deg phase=0.15 elev= -6.0 )
AL_20110827_021444796_000002_14120801     0 star  filter C [ 7787.5s -  7967.5s] expo=180s elev=11.1deg humid= 57% sunelev=-25.0deg (moon at  48.0deg phase=0.15 elev= -5.0 )
AL_20110827_021755067_000002_14120801     0 star  filter R [ 7977.7s -  8157.7s] expo=180s elev=11.3deg humid= 60% sunelev=-24.6deg (moon at  48.0deg phase=0.15 elev= -4.0 )
AL_20110827_022217739_000002_14120901     3 stars filter C [ 8240.4s -  8420.4s] expo=180s elev=11.5deg humid= 59% sunelev=-24.0deg (moon at  48.0deg phase=0.15 elev= -4.0 )
AL_20110827_022528009_000002_14120901     3 stars filter C [ 8430.7s -  8610.7s] expo=180s elev=11.7deg humid= 53% sunelev=-23.6deg (moon at  48.0deg phase=0.15 elev= -3.0 )
AL_20110827_022838290_000002_14120901     3 stars filter R [ 8620.9s -  8800.9s] expo=180s elev=11.9deg humid= 54% sunelev=-23.2deg (moon at  48.0deg phase=0.15 elev= -3.0 )
AL_20110827_023149040_000002_14120901     3 stars filter C [ 8811.7s -  8991.7s] expo=180s elev=12.1deg humid= 54% sunelev=-22.8deg (moon at  48.0deg phase=0.15 elev= -2.0 )
AL_20110827_023459510_000002_14120901     3 stars filter C [ 9002.2s -  9182.2s] expo=180s elev=12.3deg humid= 54% sunelev=-22.3deg (moon at  48.0deg phase=0.15 elev= -2.0 )
AL_20110827_023809827_000002_14120901     3 stars filter R [ 9192.4s -  9372.4s] expo=180s elev=12.5deg humid= 52% sunelev=-21.9deg (moon at  48.0deg phase=0.15 elev= -1.0 )
AL_20110827_024215296_000002_14121001     4 stars filter C [ 9437.9s -  9617.9s] expo=180s elev=12.8deg humid= 52% sunelev=-21.3deg (moon at  48.0deg phase=0.15 elev= +0.0 )
AL_20110827_024525567_000002_14121001     3 stars filter C [ 9628.2s -  9808.2s] expo=180s elev=13.0deg humid= 53% sunelev=-20.9deg (moon at  48.0deg phase=0.15 elev= +0.0 )
AL_20110827_024835848_000002_14121001     3 stars filter R [ 9818.5s -  9998.5s] expo=180s elev=13.2deg humid= 52% sunelev=-20.4deg (moon at  48.0deg phase=0.15 elev= +0.0 )
AL_20110827_025146379_000002_14121001     3 stars filter C [10009.0s - 10189.0s] expo=180s elev=13.4deg humid= 52% sunelev=-20.0deg (moon at  48.0deg phase=0.15 elev= +0.0 )
AL_20110827_025456864_000002_14121001     3 stars filter C [10199.5s - 10379.5s] expo=180s elev=13.7deg humid= 52% sunelev=-19.5deg (moon at  48.0deg phase=0.15 elev= +1.0 )
AL_20110827_025807540_000002_14121001     3 stars filter R [10390.2s - 10570.2s] expo=180s elev=13.9deg humid= 54% sunelev=-19.1deg (moon at  48.0deg phase=0.15 elev= +1.0 )
AL_20110827_030208696_000002_14121101     4 stars filter C [10631.3s - 10811.3s] expo=180s elev=14.2deg humid= 51% sunelev=-18.5deg (moon at  48.0deg phase=0.15 elev= +2.0 )
AL_20110827_030519891_000002_14121101     4 stars filter C [10822.5s - 11002.5s] expo=180s elev=14.4deg humid= 45% sunelev=-18.0deg (moon at  48.0deg phase=0.15 elev= +2.0 )
AL_20110827_030830843_000002_14121101     3 stars filter R [11013.5s - 11193.5s] expo=180s elev=14.7deg humid= 44% sunelev=-17.6deg (moon at  48.0deg phase=0.15 elev= +3.0 )
AL_20110827_031140890_000002_14121101     3 stars filter C [11203.5s - 11383.5s] expo=180s elev=14.9deg humid= 44% sunelev=-17.1deg (moon at  48.0deg phase=0.15 elev= +3.0 )
AL_20110827_031451610_000002_14121101     3 stars filter C [11394.3s - 11574.3s] expo=180s elev=15.2deg humid= 47% sunelev=-16.6deg (moon at  48.0deg phase=0.15 elev= +4.0 )
AL_20110827_031801677_000002_14121101     4 stars filter R [11584.3s - 11764.3s] expo=180s elev=15.4deg humid= 44% sunelev=-16.1deg (moon at  48.0deg phase=0.15 elev= +4.0 )
AL_20110827_032210161_000002_14121201     5 stars filter C [11832.8s - 12012.8s] expo=180s elev=15.8deg humid= 44% sunelev=-15.5deg (moon at  48.0deg phase=0.15 elev= +5.0 )
AL_20110827_032520479_000002_14121201     5 stars filter C [12023.1s - 12203.1s] expo=180s elev=16.0deg humid= 43% sunelev=-15.0deg (moon at  48.0deg phase=0.15 elev= +6.0 )
AL_20110827_032831214_000002_14121201     3 stars filter R [12213.8s - 12393.8s] expo=180s elev=16.3deg humid= 43% sunelev=-14.5deg (moon at  48.0deg phase=0.15 elev= +6.0 )
AL_20110827_033141228_000002_14121201     3 stars filter C [12403.9s - 12583.9s] expo=180s elev=16.6deg humid= 43% sunelev=-14.0deg (moon at  48.0deg phase=0.15 elev= +7.0 )
AL_20110827_033452182_000002_14121201     3 stars filter C [12594.8s - 12774.8s] expo=180s elev=16.8deg humid= 40% sunelev=-13.5deg (moon at  48.0deg phase=0.15 elev= +7.0 )
AL_20110827_033802498_000002_14121201     2 stars filter R [12785.1s - 12965.1s] expo=180s elev=17.1deg humid= 38% sunelev=-13.0deg (moon at  48.0deg phase=0.15 elev= +8.0 )
AL_20110827_034212139_000002_14121301     3 stars filter C [13034.8s - 13214.8s] expo=180s elev=17.5deg humid= 38% sunelev=-12.3deg (moon at  48.0deg phase=0.15 elev= +8.0 )
AL_20110827_034522223_000002_14121301     2 stars filter C [13224.8s - 13404.8s] expo=180s elev=17.8deg humid= 38% sunelev=-11.8deg (moon at  48.0deg phase=0.15 elev= +9.0 )
AL_20110827_034832472_000002_14121301     2 stars filter R [13415.1s - 13595.1s] expo=180s elev=18.0deg humid= 39% sunelev=-11.3deg (moon at  48.0deg phase=0.15 elev=+10.0 )
AL_20110827_035143192_000002_14121301     0 star  filter C [13605.9s - 13785.9s] expo=180s elev=18.3deg humid= 40% sunelev=-10.8deg (moon at  48.0deg phase=0.15 elev=+10.0 )
AL_20110827_035453487_000002_14121301     0 star  filter C [13796.1s - 13976.1s] expo=180s elev=18.6deg humid= 39% sunelev=-10.3deg (moon at  48.0deg phase=0.15 elev=+11.0 )
AL_20110827_035803524_000002_14121301     0 star  filter R [13986.2s - 14166.2s] expo=180s elev=18.9deg humid= 40% sunelev=-9.8deg (moon at  48.0deg phase=0.15 elev=+11.0 )
AL_20110827_040223851_000002_14121401     0 star  filter C [14246.5s - 14426.5s] expo=180s elev=19.3deg humid= 40% sunelev=-9.1deg (moon at  48.0deg phase=0.14 elev=+12.0 )
AL_20110827_040534123_000002_14121401     0 star  filter C [14436.8s - 14616.8s] expo=180s elev=19.6deg humid= 38% sunelev=-8.5deg (moon at  48.0deg phase=0.14 elev=+12.0 )
AL_20110827_040845091_000002_14121401     0 star  filter R [14627.8s - 14807.8s] expo=180s elev=20.0deg humid= 38% sunelev=-8.0deg (moon at  48.0deg phase=0.14 elev=+13.0 )
AL_20110827_041156059_000002_14121401     0 star  filter C [14818.7s - 14998.7s] expo=180s elev=20.3deg humid= 37% sunelev=-7.5deg (moon at  48.0deg phase=0.14 elev=+14.0 )
AL_20110827_041507064_000002_14121401     0 star  filter C [15009.7s - 15189.7s] expo=180s elev=20.6deg humid= 37% sunelev=-6.9deg (moon at  48.0deg phase=0.14 elev=+14.0 )
AL_20110827_041818001_000002_14121401     0 star  filter R [15200.7s - 15380.7s] expo=180s elev=20.9deg humid= 34% sunelev=-6.4deg (moon at  48.0deg phase=0.14 elev=+15.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455800.5013020835 2011-08-27T00:01:52.500
Date of notice : 2455800.5018055555 2011-08-27T00:02:35.999
Refined position : no
RA(J2000.0) : 164.095000 10h56m22s8
DEC(J2000.0) : 53.787000 +53d47m13s19
Error box : x=10:120 y=10:120 (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=153.469225 lat=55.977126
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.011
Assuming Rv=3.1: Av=0.035 Ar=0.028 Ai=0.021
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 133 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 110827: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A. (CESR-OMP), Gendre B. (ASDC),
Boer M. (OHP-OAMP), Atteia J.L. (LATT-OMP) report:

We imaged the field of GRB 110827 detected by SWIFT
(trigger 501520) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 58.4s after the GRB trigger
(14.8s after the notice). The elevation of the field decreased from
7 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-08-27T00:01:52.320

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+58.4s to t0+118.4s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+133.4s to t0+163.4s : R > 16.2

We co-added a series of exposures:
t0+133.4s to t0+742.6s : 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 58.4s 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=153.4692 lat=+55.9771
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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