GRBlog: GCN 9403

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GRB 090519: NOT afterglow candidate	Thoene et al.
	GCN 9403

SOURCE: GCN
TITLE: GCN CIRCULAR
NUMBER: 9403
SUBJECT: GRB 090519: NOT afterglow candidate
DATE: 09/05/19 22:32:39 GMT
FROM: Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@astro.ku.dk>

C. C. Thoene (INAF/Brera), D. Malesani (DARK/NBI), A. J. Levan (Univ. Warwick), P. Jakobsson (Univ. Iceland), J. Hjorth (DARK/NBI), and N. R. Tanvir (Univ. Leicerster), report on behalf of a larger collaboration

We observed the field of GRB 090519 (Perri et al.

, GCN 9400) with the NOT equipped with ALFOSC. At the edge of the XRT error circle, we detect a fading source at coordinates (J2000): RA = 09:29:07.0 Dec = +00:10:49.1 with an error of ~0.5". The source faded by ~0.3 +- 0.10 mag between 19.8 and 44.4 min after the GRB, suggesting that this is indeed the afterglow of GRB 090519. A (fainter) object is seen at the position of the candidate in the SDSS, which may be a bright host galaxy. On May 19.897 UT, the source had R ~ 21.6.

...

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