The recommended list of standard stars for HAWK-I is maintained on the instrument web pages here. Standard stars observed witin the context of the HAWK-I calibration plan are slected from this table. Visiting Astronomers and Service Mode astronomers may also select stars from these lists. All stars in these lists are guaranteed to be included in the HAWK-I STDSTAR_CAT FITS table catalog static calibration meaning that, provided the OB is constructed in the HAWK-I standard star standard way (i.e. four observations of the standard star with the standard star placed at the center of each of the fourchips in turn), it will be properly reduced by the online pipeline at Paranal and by the offline processing by QC, Garching. For standard stars observed in the standard way but not in the standard version of the STDSTAR_CAT catalog, to use the hawki_img_zpoint recipe of the HAWK-I pipeline users must create their own catalog including the relevant stars (details given below). The HAWK-I STDSTAR_CAT FITS table catalog static calibration consists of a Multi-Extension FITS (MEF) file. Each extension is derived from an input ascii text file in simple format specifying Name, RA, Dec, Spec.Type, J, H, K and Y magnitudes for each star on one line. Comments can be added to the ascii file using the '#' char in the first column of the line. The FITS file catalog is then created by the hawki_util_stdstars recipe of the HAWK-I pipeline with the command:

esorex hawki_util_stdstars <sof>

HAWKI_Persson_pipeline_2008-11-03.txt   STDSTAR_CAT
HAWKI_UKIRT_pipeline_2008-11-03.txt     STDSTAR_CAT