GRB120326_012029_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20120326_012347135_000002_49057501    15 stars filter C [  133.1s -   193.1s] expo= 60s elev=50.0deg humid= 57% sunelev=-38.2deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_012428589_000002_49057501    15 stars filter C [  204.5s -   234.5s] expo= 30s elev=50.1deg humid= 57% sunelev=-38.1deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_012509323_000002_49057501    12 stars filter C [  245.3s -   275.3s] expo= 30s elev=50.1deg humid= 57% sunelev=-38.0deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_012550750_000002_49057501    11 stars filter C [  286.7s -   316.7s] expo= 30s elev=50.2deg humid= 57% sunelev=-37.9deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_012632389_000002_49057501    14 stars filter C [  328.4s -   358.4s] expo= 30s elev=50.2deg humid= 57% sunelev=-37.9deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_012712905_000002_49057501    12 stars filter C [  368.9s -   398.9s] expo= 30s elev=50.3deg humid= 57% sunelev=-37.8deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_012912483_000002_49057601    15 stars filter C [  428.4s -   518.4s] expo= 90s elev=50.4deg humid= 57% sunelev=-37.7deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_013053186_000002_49057601    17 stars filter C [  529.2s -   619.2s] expo= 90s elev=50.6deg humid= 57% sunelev=-37.5deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_013234172_000002_49057601    16 stars filter C [  630.1s -   720.1s] expo= 90s elev=50.7deg humid= 57% sunelev=-37.3deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_013431344_000002_49057701    15 stars filter C [  747.4s -   837.4s] expo= 90s elev=50.9deg humid= 57% sunelev=-37.1deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_013612805_000002_49057701    19 stars filter C [  848.8s -   938.8s] expo= 90s elev=51.1deg humid= 57% sunelev=-36.9deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_013754038_000002_49057701    15 stars filter C [  950.0s -  1040.0s] expo= 90s elev=51.2deg humid= 57% sunelev=-36.7deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_013950976_000002_49057801    14 stars filter C [ 1067.0s -  1157.0s] expo= 90s elev=51.4deg humid= 56% sunelev=-36.5deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_014131727_000002_49057801    17 stars filter C [ 1167.7s -  1257.7s] expo= 90s elev=51.5deg humid= 56% sunelev=-36.3deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_014312726_000002_49057801    17 stars filter C [ 1268.7s -  1358.7s] expo= 90s elev=51.7deg humid= 57% sunelev=-36.1deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_014518961_000002_49057901    19 stars filter C [ 1394.9s -  1484.9s] expo= 90s elev=51.8deg humid= 57% sunelev=-35.9deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_014659698_000002_49057901    16 stars filter C [ 1495.7s -  1585.7s] expo= 90s elev=52.0deg humid= 57% sunelev=-35.7deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_014840682_000002_49057901    13 stars filter C [ 1596.7s -  1686.7s] expo= 90s elev=52.1deg humid= 57% sunelev=-35.5deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_015237589_000002_49058001    17 stars filter C [ 1743.6s -  1923.6s] expo=180s elev=52.4deg humid= 57% sunelev=-35.2deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_015547840_000002_49058001    20 stars filter C [ 1933.8s -  2113.8s] expo=180s elev=52.7deg humid= 56% sunelev=-34.8deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_015859282_000002_49058001    14 stars filter R [ 2125.3s -  2305.3s] expo=180s elev=53.0deg humid= 56% sunelev=-34.4deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_020227187_000002_49058101    19 stars filter C [ 2333.2s -  2513.2s] expo=180s elev=53.3deg humid= 56% sunelev=-34.0deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_020538391_000002_49058101    19 stars filter C [ 2524.4s -  2704.4s] expo=180s elev=53.5deg humid= 56% sunelev=-33.5deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_020849631_000002_49058101    16 stars filter R [ 2715.6s -  2895.6s] expo=180s elev=53.8deg humid= 56% sunelev=-33.1deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_021215880_000002_49058201    17 stars filter C [ 2921.9s -  3101.9s] expo=180s elev=54.1deg humid= 56% sunelev=-32.7deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_021526849_000002_49058201    22 stars filter C [ 3112.8s -  3292.8s] expo=180s elev=54.4deg humid= 56% sunelev=-32.2deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_021838291_000002_49058201    14 stars filter R [ 3304.3s -  3484.3s] expo=180s elev=54.6deg humid= 57% sunelev=-31.8deg (moon at  85.0deg phase=0.21 elev=-29.0 )
AL_20120326_022204807_000002_49058301    20 stars filter C [ 3510.8s -  3690.8s] expo=180s elev=54.9deg humid= 57% sunelev=-31.3deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_022516260_000002_49058301    20 stars filter C [ 3702.2s -  3882.2s] expo=180s elev=55.2deg humid= 57% sunelev=-30.9deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_022826751_000002_49058301    15 stars filter R [ 3892.7s -  4072.7s] expo=180s elev=55.4deg humid= 57% sunelev=-30.5deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_023202532_000002_49058401    20 stars filter C [ 4108.5s -  4288.5s] expo=180s elev=55.7deg humid= 57% sunelev=-29.9deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_023513048_000002_49058401    17 stars filter C [ 4299.0s -  4479.0s] expo=180s elev=56.0deg humid= 57% sunelev=-29.5deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_023824020_000002_49058401    15 stars filter R [ 4490.0s -  4670.0s] expo=180s elev=56.2deg humid= 56% sunelev=-29.0deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_024141490_000002_49058501    20 stars filter C [ 4687.5s -  4867.5s] expo=180s elev=56.5deg humid= 56% sunelev=-28.5deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_024451756_000002_49058501    21 stars filter C [ 4877.7s -  5057.7s] expo=180s elev=56.7deg humid= 56% sunelev=-28.1deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_024803213_000002_49058501    15 stars filter R [ 5069.2s -  5249.2s] expo=180s elev=57.0deg humid= 56% sunelev=-27.6deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_025131120_000002_49058601    19 stars filter C [ 5277.1s -  5457.1s] expo=180s elev=57.3deg humid= 56% sunelev=-27.1deg (moon at  85.0deg phase=0.21 elev=-28.0 )
AL_20120326_025442073_000002_49058601    22 stars filter C [ 5468.0s -  5648.0s] expo=180s elev=57.5deg humid= 56% sunelev=-26.6deg (moon at  85.0deg phase=0.21 elev=-27.0 )
AL_20120326_025752561_000002_49058601    15 stars filter R [ 5658.6s -  5838.6s] expo=180s elev=57.7deg humid= 56% sunelev=-26.1deg (moon at  85.0deg phase=0.21 elev=-27.0 )
AL_20120326_030121203_000002_49058701    21 stars filter C [ 5867.2s -  6047.2s] expo=180s elev=58.0deg humid= 55% sunelev=-25.6deg (moon at  85.0deg phase=0.21 elev=-27.0 )
AL_20120326_030432389_000002_49058701    22 stars filter C [ 6058.4s -  6238.4s] expo=180s elev=58.2deg humid= 55% sunelev=-25.1deg (moon at  85.0deg phase=0.21 elev=-27.0 )
AL_20120326_030742942_000002_49058701    14 stars filter R [ 6248.9s -  6428.9s] expo=180s elev=58.5deg humid= 55% sunelev=-24.6deg (moon at  85.0deg phase=0.21 elev=-27.0 )
AL_20120326_031109863_000002_49058801    20 stars filter C [ 6455.8s -  6635.8s] expo=180s elev=58.7deg humid= 55% sunelev=-24.0deg (moon at  85.0deg phase=0.21 elev=-27.0 )
AL_20120326_031421286_000002_49058801    19 stars filter C [ 6647.3s -  6827.3s] expo=180s elev=59.0deg humid= 54% sunelev=-23.5deg (moon at  85.0deg phase=0.21 elev=-26.0 )
AL_20120326_031731571_000002_49058801    15 stars filter R [ 6837.6s -  7017.6s] expo=180s elev=59.2deg humid= 54% sunelev=-23.0deg (moon at  85.0deg phase=0.21 elev=-26.0 )
AL_20120326_032107821_000002_49058901    20 stars filter C [ 7053.8s -  7233.8s] expo=180s elev=59.4deg humid= 54% sunelev=-22.5deg (moon at  85.0deg phase=0.22 elev=-26.0 )
AL_20120326_032419509_000002_49058901    20 stars filter C [ 7245.5s -  7425.5s] expo=180s elev=59.6deg humid= 54% sunelev=-21.9deg (moon at  85.0deg phase=0.22 elev=-26.0 )
AL_20120326_032730684_000002_49058901    15 stars filter R [ 7436.7s -  7616.7s] expo=180s elev=59.9deg humid= 54% sunelev=-21.4deg (moon at  85.0deg phase=0.22 elev=-26.0 )
AL_20120326_033047014_000002_49059001    19 stars filter C [ 7633.0s -  7813.0s] expo=180s elev=60.1deg humid= 54% sunelev=-20.9deg (moon at  85.0deg phase=0.22 elev=-25.0 )
AL_20120326_033357794_000002_49059001    16 stars filter C [ 7823.7s -  8003.7s] expo=180s elev=60.3deg humid= 54% sunelev=-20.4deg (moon at  85.0deg phase=0.22 elev=-25.0 )
AL_20120326_033709191_000002_49059001    15 stars filter R [ 8015.1s -  8195.1s] expo=180s elev=60.5deg humid= 55% sunelev=-19.8deg (moon at  85.0deg phase=0.22 elev=-25.0 )
AL_20120326_034045207_000002_49059101    19 stars filter C [ 8231.2s -  8411.2s] expo=180s elev=60.7deg humid= 55% sunelev=-19.2deg (moon at  85.0deg phase=0.22 elev=-25.0 )
AL_20120326_034355690_000002_49059101    21 stars filter C [ 8421.7s -  8601.7s] expo=180s elev=60.9deg humid= 56% sunelev=-18.7deg (moon at  85.0deg phase=0.22 elev=-24.0 )
AL_20120326_034706914_000002_49059101    16 stars filter R [ 8612.9s -  8792.9s] expo=180s elev=61.1deg humid= 56% sunelev=-18.2deg (moon at  85.0deg phase=0.22 elev=-24.0 )
AL_20120326_035025101_000002_49059201    16 stars filter C [ 8811.0s -  8991.0s] expo=180s elev=61.3deg humid= 57% sunelev=-17.6deg (moon at  85.0deg phase=0.22 elev=-24.0 )
AL_20120326_035335805_000002_49059201    19 stars filter C [ 9001.8s -  9181.8s] expo=180s elev=61.5deg humid= 57% sunelev=-17.1deg (moon at  85.0deg phase=0.22 elev=-24.0 )
AL_20120326_035646341_000002_49059201    14 stars filter R [ 9192.3s -  9372.3s] expo=180s elev=61.6deg humid= 57% sunelev=-16.5deg (moon at  85.0deg phase=0.22 elev=-23.0 )
AL_20120326_040013997_000002_49059301    23 stars filter C [ 9400.0s -  9580.0s] expo=180s elev=61.8deg humid= 57% sunelev=-16.0deg (moon at  85.0deg phase=0.22 elev=-23.0 )
AL_20120326_040324278_000002_49059301    20 stars filter C [ 9590.2s -  9770.2s] expo=180s elev=62.0deg humid= 57% sunelev=-15.4deg (moon at  85.0deg phase=0.22 elev=-23.0 )
AL_20120326_040634565_000002_49059301    14 stars filter R [ 9780.5s -  9960.5s] expo=180s elev=62.2deg humid= 57% sunelev=-14.9deg (moon at  86.0deg phase=0.22 elev=-22.0 )
AL_20120326_041003629_000002_49059401    22 stars filter C [ 9989.6s - 10169.6s] expo=180s elev=62.3deg humid= 58% sunelev=-14.3deg (moon at  86.0deg phase=0.22 elev=-22.0 )
AL_20120326_041314112_000002_49059401    19 stars filter C [10180.1s - 10360.1s] expo=180s elev=62.5deg humid= 58% sunelev=-13.7deg (moon at  86.0deg phase=0.22 elev=-22.0 )
AL_20120326_041625556_000002_49059401    15 stars filter R [10371.5s - 10551.5s] expo=180s elev=62.6deg humid= 58% sunelev=-13.2deg (moon at  86.0deg phase=0.22 elev=-21.0 )
AL_20120326_042421040_000002_49059601    15 stars filter C [10847.0s - 11027.0s] expo=180s elev=63.0deg humid= 57% sunelev=-11.8deg (moon at  86.0deg phase=0.22 elev=-21.0 )
AL_20120326_042731780_000002_49059601    11 stars filter C [11037.8s - 11217.8s] expo=180s elev=63.1deg humid= 56% sunelev=-11.2deg (moon at  86.0deg phase=0.22 elev=-20.0 )
AL_20120326_043043029_000002_49059601    10 stars filter R [11229.0s - 11409.0s] expo=180s elev=63.2deg humid= 56% sunelev=-10.7deg (moon at  86.0deg phase=0.22 elev=-20.0 )
AL_20120326_043412044_000002_49059701     7 stars filter C [11438.0s - 11618.0s] expo=180s elev=63.4deg humid= 56% sunelev=-10.1deg (moon at  86.0deg phase=0.22 elev=-20.0 )
AL_20120326_043722580_000002_49059701     0 star  filter C [11628.5s - 11808.5s] expo=180s elev=63.5deg humid= 57% sunelev=-9.5deg (moon at  86.0deg phase=0.22 elev=-19.0 )
AL_20120326_044033784_000002_49059701     8 stars filter R [11819.7s - 11999.7s] expo=180s elev=63.6deg humid= 57% sunelev=-8.9deg (moon at  86.0deg phase=0.22 elev=-19.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2456012.55589 2012-03-26T01:20:28.895
Decoded useful notice informations.
RA(J2000.0) : 273.9022 18h15m36s5
DEC(J2000.0) : 69.2593 +69d15m33s47
Error radius : 5.0 arcsec
Error box : x=71:74 y=42:45 (pixels)

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=99.521942 lat=28.385239
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.053
Assuming Rv=3.1: Av=0.175 Ar=0.141 Ai=0.102
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 76 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 120326: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR),
Boer M. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 120326 detected by SWIFT
(trigger 518626) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 133.1s after the GRB trigger
(119.3s after the notice). The elevation of the field increased from
49 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2012-03-26T01:20:28.895

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+133.1s to t0+193.1s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+204.5s to t0+234.5s : R > 16.2

We co-added a series of exposures:
t0+204.5s to t0+518.4s : 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 133.1s 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= 99.5219 lat=+28.3852
and the galactic extinction in R band is 0.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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