Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 6436

GRB070521: P200 Observations
2007-05-21T08:54:12Z (17 years ago)
S. Bradley Cenko at Caltech <>
A. Rau, M. M. Kasliwal, and S. B. Cenko (Caltech) report on behalf of a
larger collabortation:

We obtained R-band photometry of GRB070521 with the Large Format
Camera mounted on the Palomar 200-inch telescope. Observations started 29
min post-burst and lasted 3x300s. Calibration was performed relative to
the SDSS (Cool et al.; GCN 6432).

We find no source in the XRT error circle (Guidorzi et al. 2007; GCN 6431)
to a limiting magnitude of R>23.3.
Looking for U.S. government information and services? Visit