GRB 080928 afterglow imaging and spectro-polarimetry

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Volume 666 (October 2022)

A&A, 666 (2022) A179

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Table A.2

Log of ESO-VLT FORS1 spectro-polarimetry observations

TIME	ANGLE	t_exp	SEEING	AIR MASS
(UT-09/29)	[°]	[s]	[″]	(start/end)
05:58:22	0	300	1.5	1.85/1.81
06:04:06	22.5	300	1.5	1.81/1.77
06:09:51	45	300	1.5	1.77/1.74
06:15:36	67.5	300	1.5	1.73/1.70
06:21:43	0	300	1.4	1.67/1.67
06:27:27	22.5	300	1.5	1.67/1.64
06:33:11	45	300	1.5	1.63/1.61
06:38:55	67.5	300	1.5	1.61/1.58
06:51:49	0	300	1.4	1.55/1.52
06:57:33	22.5	300	1.5	1.52/1.50
07:03:18	45	300	1.5	1.50/1.48
07:09:03	67.5	300	1.5	1.48/1.46
07:15:11	0	300	1.5	1.45/1.44
07:20:55	22.5	300	1.4	1.43/1.42
07:26:39	45	300	1.5	1.41/1.40
07:32:24	67.5	300	1.2	1.40/1.38

Notes. GRB 080928 optical afterglow spectro-polarimetry (PMOS) observations takenwithESO-VLTFORS1 on the night of 2008 September 28, with seeing and air mass values. The results for the seeing lie within a 5% error range with respect to a reference value of 1.5″, except for the last measurement.

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