Table 1: Log of observations for RXS J1131-1231 with HST.
Date Instrument Filter NExp Exp(s) Scale (''/pix) RON (e/pix) g (e/ADU)
17-11-2003 NICMOS-NIC2 F160W 5 640 0.0759/0.0754$^\dag $ 26 5.4
17-11-2003 NICMOS-NIC2 F160W 3 704 0.0759/0.0754$^\dag $ 26 5.4
22-06-2004 ACS-WFC F555W 5 396 0.050$^\ddag $ 5.3 2.0
24-06-2004 ACS-WFC F814W 5 396 0.050$^\ddag $ 5.3 2.0

$^\dag $ NIC2 plate scale along X and Y respectively (see http://www.stsci.edu/hst/nicmos/performance/platescale).
$^\ddag $ The reported ACS scale is obtained after drizzling.

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