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J/ApJ/672/449       GRB 061126 light curves                  (Perley+, 2008)

The troublesome broadband evolution of GRB 061126: does a gray burst imply gray dust? Perley D.A., Bloom J.S., Butler N.R., Pollack L.K., Holtzman J., Blake C.H., Kocevski D., Vestrand W.T., Li W., Foley R.J., Bellm E., Chen H.-W., Prochaska J.X., Starr D., Filippenko A.V., Falco E.E., Szentgyorgyi A.H., Wren J., Wozniak P.R., White R., Pergande J. <Astrophys. J., 672, 449-464 (2008)> =2008ApJ...672..449P
ADC_Keywords: Gamma rays ; Photometry Keywords: gamma-rays: bursts Abstract: We report on observations of a gamma-ray burst (GRB 061126) with an extremely bright (R∼12mag at peak) early-time optical afterglow. The optical afterglow is already fading as a power law 22s after the trigger, with no detectable prompt contribution in our first exposure, which was coincident with a large prompt-emission gamma-ray pulse. The optical-infrared photometric SED is an excellent fit to a power law, but it exhibits a moderate red-to-blue evolution in the spectral index at about 500s after the burst. This color change is contemporaneous with a switch from a relatively fast decay to slower decay. Description: At 08:47:56 on 2006 November 26 (UT dates are used throughout this paper), the Swift Burst Alert Telescope (BAT) triggered and located GRB 061126. Unfortunately, due to an Earth limb constraint, Swift was unable to slew promptly to the target for 23 minutes and could not begin observations with the XRT or the Ultraviolet/Optical Telescope (UVOT) before that time. After 23 minutes, Swift slewed to the burst position and detected a fading X-ray afterglow (Sbarufatti et al. 2006GCN..5855....1S). We download the Swift BAT and XRT data from the Swift Archive. The XRT data are processed with version 0.10.3 of the xrtpipeline reduction script from the HEAsoft 6.0.69 software release. We employ the latest (2006 December 19) XRT and BAT calibration files. Objects: -------------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------------- 05 46 24.5 +64 12 38 GRB 061126 = GRB 061126 -------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 44 412 XRT light curve of GRB table2.dat 50 33 RAPTOR observations of GRB 061126 table3.dat 50 102 PAIRITEL observations of GRB 061126 table4.dat 50 50 NMSU 1m Observations of GRB 061126 table5.dat 50 27 KAIT and Lick 1m Observations of GRB 061126 table6.dat 50 30 UVOT Observations of GRB 061126
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 F9.2 s Tstart Observation start time (1) 11- 20 F10.2 s Tend Observation end time (1) 22- 32 F11.8 uJy Flux Swift/XRT flux (2) 34- 44 F11.8 uJy e_Flux Uncertainty in Flux
Note (1): Measured from the Swift trigger 26 November 2006 08:47:56.4 UT. Note (2): Normalized to 1keV and corrected for NH absorption. The conversion factor is 7.5µJy/cps.
Byte-by-byte Description of file: table[23456].dat
Bytes Format Units Label Explanations
1- 7 F7.1 s Tmid Mid-time of exposure (1) 9- 13 A5 --- Filt Filter used (2) 15- 20 F6.1 s ExpTime Exposure time 22- 23 A2 --- l_mag [≥ ] Limit flag on mag 24- 28 F5.2 mag mag Observed magnitude in Filt (3) 30- 33 F4.2 mag e_mag ? Uncertainty in mag 34 A1 --- f_mag [c] Flag on mag (4) 35- 36 A2 --- l_Flux [≤ ] Limit flag on Flux 37- 43 F7.1 uJy Flux Observed flux (3) 45- 50 F6.1 uJy e_Flux ? Uncertainty in Flux
Note (1): Measured from the Swift trigger 26 November 2006 08:47:56.4 UT. Note (2): Filters used: table2 : clear table3 : J, H, Ks table4 : U, B, V, R, I table5 : V, R, I, clear table6 : U, B, V, UVW1 (260nm), UVM2 (225nm), White Note (3): Not corrected for Galactic extinction. Note (4): c: Contemporaneous with strong GRB pulse; point not used in modeling.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 05-Apr-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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