[AAVSO-HEN] GRB 070406: Star in XRT error circle S2 is an AGN?

[arne]

I find it amusing that, whether you have an 8-inch or an 8-meter telescope,
everything of interest is always "faint", needing more exposure and
better seeing.
Arne

GCN Circulars wrote:
> TITLE:   GCN CIRCULAR
> NUMBER:  6266
> SUBJECT: GRB 070406: "Star" in XRT error circle S2 is an AGN?
> DATE:    07/04/10 21:45:34 GMT
> FROM:    Edo Berger at Carnegie Obs  <eberger at ociw.edu>
> 
> E. Berger (Carnegie Observatories) reports:
> 
> "Inspection of our Gemini-North/GMOS images taken on 2007 April 8.39 UT in 
> 0.55" seeing reveal that the source near the center of XRT source S2 (GCN 
> 6265), which is classified as a star in SDSS, is embedded within a clearly 
> extended source.  This may be a chance superposition of a star on top of a 
> background galaxy, or more likely, it is a bright AGN, similar to the 
> source coincident with XRT source S1 (GCN 6262).  Additional XRT 
> observations are required to verify whether the source is steady.
> 
> We also note that in addition to the galaxy located 3.7" from the XRT 
> position, our images reveal five fainter extended sources within the error 
> circle."
>