GRBlog: GCN 9396

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GRB 090516: Observations from Stardome Observatory	Christie, Postigo, & Natusch
	GCN 9396

SOURCE: GCN
TITLE: GCN CIRCULAR
NUMBER: 9396
SUBJECT: GRB 090516: Observations from Stardome Observatory
DATE: 09/05/19 06:10:37 GMT
FROM: Antonio Deugarte at IAA-CSIC <deugarte@iaa.es>

G. W. Christie (Stardome/ New Zealand), A. de Ugarte Postigo (ESO/ Chile), and T. Natusch (Stardome/ New Zealand) on behalf of a larger collaboration report:

We observed the field of GRB 090516 (Rowlinson et al. GCN 9374) with the Stardome 0.4m telescope located in Auckland (New Zealand) starting at 09:25UT. We used a SG530 filter that transmits wavelengths above 5300 Angstroms and a SBIG ST-L-6303E CCD (KAF-6303E detector). A 9x300s combined exposure with mean epoch 16.4080 May (80 minutes after the burst) shows an object at the position of the afterglow (Guidorzi et al. GCN 9375) measured at R = 20.8 +/- 0.2 as compared to USNO-B1.0 stars. We note that with the GRB at a redshift of 4.1 (de Ugarte Postigo et al. GCN 9383), Ly-alpha falls within the R-band, so that comparison of clear and very broad band filters such as ours with R-band has to be handled with care.

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