GRBlog: GCN 7444

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<-- GCN 7443 | GCN 7445 -->

VLT/UVES redshift of GRB 080319B	Vreeswijk et al.
	GCN 7444

SOURCE: GCN
TITLE: GCN CIRCULAR
NUMBER: 7444
SUBJECT: VLT/UVES redshift of GRB 080319B
DATE: 08/03/19 13:34:33 GMT
FROM: Paul Vreeswijk at Dark Cosmology Centre,U.of Copenhagen <pmv@dark-cosmology.dk>

P. M. Vreeswijk (DARK), A. Smette (ESO), D. Malesani, J. P. U. Fynbo, Bo Milvang-Jensen (DARK), P. Jakobsson (U. Hertfordshire), A. O. Jaunsen (U. Oslo), and C. Ledoux (ESO) report on behalf of a larger collaboration:

We observed the optical afterglow of GRB 080319B (Racusin et al., GCN 7427) with the Ultraviolet and Visual Echelle Spectrograph (UVES) mounted at ESO's VLT Kueyen. Observations were performed in rapid-response mode starting on 2008 March 19 at 07:18 UT.

The highest redshift system that we identify based on the MgII doublet and various other features has z=0.937, the presumed redshift of GRB 080319B. Another system is identified at z=0.530.

We acknowledge excellent support from the observing staff at Paranal, in particular Swetlana Hubrig and Elena Mason.

...

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Spectral Observations

GRB_ID	OBSDATE (UT)	T_BURST	EXP	MIN_WAV (A)	MAX_WAV (A)	RES (A)
20080319B	2008 Mar 19 07:18:00

Line Observations

GRB_ID	LINE (A)	LINEID	LINEZ	LINEFLUX (erg cm-2 s-1)	ABS
20080319B		MgII	0.937		yes
20080319B		MgII	0.530		yes

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