GCN Circular 3442
Subject
XRF050509C: Chandra Afterglow Detection
Date
2005-05-20T18:09:04Z (19 years ago)
From
Derek Fox at CIT <derekfox@astro.caltech.edu>
Derek B. Fox (Caltech) reports on behalf of a larger collaboration:
"We have observed the afterglow (Gorosabel et al, GCN 3425) of XRF
050509C (Prigozhin et al., GCN 3402) with the Chandra X-ray
Observatory and ACIS-S detector, in a single 20-ks pointing beginning
at 09:54 UT on May 19, and detect the X-ray afterglow at a count rate
of 0.7(2) counts per ksec. This count rate corresponds to a 0.5-10
keV flux of 9E-15 erg cm-2 s-1, assuming a spectrum with power-law
photon index alpha=1.5 and Galactic N_H=5.5E+20 cm-2. We note that
this flux is consistent with the upper limit from Swift XRT at a
similar epoch (Campana et al., GCN 3441)."