On the Color Indices and Absolute Brightnesses of the Optical Afterglows of GRB

Details On the Color Indices and Absolute Brightnesses of the Optical Afterglows of GRB On the Color Indices and Absolute Brightnesses of the Optical Afterglows of GRB

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..662..338s&link_type=abstract

GAMMA-RAY BURST AND AFTERGLOW ASTRONOMY 2001: A Workshop Celebrating the First Year of the HETE Mission. AIP Conference Proceed

Astronomy and Astrophysics

Astronomy

Gamma-Ray Sources, Gamma-Ray Bursts, Photography And Photometry

Scientific paper

The study of the color indices and luminosities of 17 optical afterglows (OAs) of GRBs, including the most recent one, GRB010222, showed that the color variations during the decline of OAs are quite small during t - T0 < 10 days and allow a comparison among them, even for the less densely sampled OAs. The colors in the observer frame concentrate at (V - R)0 = 0.40+/-0.13, (R - I)0 = 0.46+/-0.18, (B - V)0 = 0.47+/-0.17, except for GRB000131 and GRB980425. However, large scatter is observed in (U - B)0. The color evolution of the OAs is negligible although their brightness declines by several magnitudes during t - T0 < 10 days. Such a strong concentration of the color indices also suggests that the intrinsic reddening (inside their host galaxies) must be quite similar and relatively small for all these events. The absolute brightness of OAs in the observer frame lies within MR0 = -26.5 to -22.2 for (t - T0)rest = 0.25 days. The general decline rate of the OA sample considered here seems to be independent of the absolute optical brightness of the OA, measured at some t - T0 identical for all OAs, and the light curves of all events are almost parallel, when corrected for the redshift-induced time dilation.

Affiliated with

Also associated with

No associations

Rating

On the Color Indices and Absolute Brightnesses of the Optical Afterglows of GRB does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the Color Indices and Absolute Brightnesses of the Optical Afterglows of GRB, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Color Indices and Absolute Brightnesses of the Optical Afterglows of GRB will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-919259