J/ApJ/654/L25 Light-curve data for GRB 050319 (Huang+, 2007)
Multicolor shallow decay and chromatic breaks in the GRB 050319
optical afterglow.
Huang K.Y., Urata Y., Kuo P.H., Ip W.H., Ioka K., Aoki T., Chen C.W.,
Chen W.P., Isogai M., Lin H.C., Makishima K., Mito H., Miyata T.,
Nakada Y., Nishiura S., Onda K., Qiu Y., Soyano T., Tamagawa T.,
Tarusawa K., Tashiro M., Yoshioka T.
<Astrophys. J., 654, L25-L28 (2007)>
=2007ApJ...654L..25H 2007ApJ...654L..25H
ADC_Keywords: Gamma rays ; Photometry, UBVRI
Keywords: gamma rays: bursts
Abstract:
Multiwavelength observations of the optical afterglow of GRB 050319
were performed from 1.31 to 9.92hr after the burst. Our R-band light
curves, combined with other published data, can be described by the
smooth broken power-law function, with α1=-0.84±0.02 to
α2=-0.48±0.03, 0.04 days after the gamma-ray burst. The
optical light curves are characterized by shallow decays as was also
observed in the X-rays which may have a similar origin, related to
energy injection. However, our observations indicate that there is
still a puzzle concerning the chromatic breaks in the R-band light
curve (at 0.04 days) and the X-ray light curve (at 0.004 days) that
remains to be solved.
Description:
After receiving the GRB alert message from Swift and after the
afterglow position was reported by Quimby et al.
(2006ApJ...640..402Q 2006ApJ...640..402Q), the Target-of-Opportunity procedures of the
East-Asia GRB Follow-up Observation Network (EAFON) were immediately
carried out. A series of multiband follow-up observations were
successfully performed by the 1.05m Schmidt telescope of the Kiso
Observatory in Japan and the Lulin One-meter Telescope (LOT) in
Taiwan. Photometric B and R images were obtained at the Kiso site with
a 2Kx2K CCD camera between 0.055 and 0.326 days after the burst. A
number of parallel B, V, R, and I images were obtained by LOT with a
PI1300 CCD camera from 0.080 to 0.413 days after the burst.
Objects:
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RA (2000) DE Designation(s)
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10 16 47.9 +43 32 54 GRB 050319 = XRF 050319
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 26 60 GRB 050319 Optical Afterglow Photometry
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See also:
J/ApJ/641/L13 : Light-curve data for GRB 030329 (Gorosabel+, 2006)
J/ApJ/642/L99 : R-band photometry of GRB 060206 (Wozniak+, 2006)
J/ApJ/654/L21 : R-band light curves of GRB 060206 & GRB 060210 (Stanek+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 F7.5 d Days Days after GRB discovery (1)
9 A1 --- Filt [BVRI] Filter used in the observation
11- 15 F5.2 mag mag Magnitude observed in Filt (2)
17- 20 F4.2 mag e_mag Error in mag
22- 26 A5 --- Site Observation site (3)
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Note (1): The burst time is 2005 March 19, UT 09:29:01.44.
Note (2): Not corrected for Galactic extinction.
Note (3): Observation site as follows:
Kiso = Kiso Observatory 1.05-m Schmidt telescope
Lulin = Lulin 1-m Telescope
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 15-Nov-2008