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Дата изменения: Tue Aug 16 06:48:59 2005
Дата индексирования: Sat Dec 22 12:48:34 2007
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Поисковые слова: arp 220

XMM-Newton Science Analysis System


eimchip2sky (eimchip2sky-1.7.1) [xmmsas_20050815_1803-6.5.0]

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Input Files

1. A list of FITS images in the CHIPCOORD coordinate system. (See the documentation for the cal task for a description of the XMM coordinate systems.) These images are supplied via the chipimgsets parameter. Each image array must contain the following:
   • An INSTRUME keyword, which must be one of the three EPIC instruments. Note that the chip images don't have to come from the same instrument.

   • If withccds is set to `no' (the current default), each chip image array header must also contain a CCDNR keyword.

   • If withatttab is set to `no' (the current default), each chip image array header must also contain RA_PNT, DEC_PNT and PA_PNT keywords.

   • The image array must be the correct size for CCDs of the given instrument. Task eimchip2sky obtains these from variables (those with names such as EMOS_MAX_X) in module caloaldefs.f90 in SAS package caloalutils.

   • The image array may be of any dal data type.

2. A template image. Its array header must contain WCS keywords (see [] for a recent description of these). The output image will be the same size as the template image and projected onto the same celestial projection plane. Note that the data contained in the template image are not read by eimchip2sky.

3. (Optional.) A dataset containing a table of samples of the spacecraft attitude. The table must contain the following:
   • A TIMEZERO keyword, which defines the start time of the first attitude bin.

   • An 8-byte real-valued column RA, containing samples of the spacecraft right ascension in decimal degrees.

   • An 8-byte real-valued column DEC, containing samples of the spacecraft declination in decimal degrees.

   • An 8-byte real-valued column PA, containing samples of the spacecraft position angle in decimal degrees.

   • An 8-byte real-valued column TIME. The $i$th entry of this column contains the end time of the $i$th attitude bin.

   NOTE! This style of recording time-varying information does not (yet) correspond to any format recognized by OGIP. Also, the format of the attitude sample table does NOT correspond to that of the output of atthkgen or with any other SAS product - the user will have to `roll their own.'

4. (Optional.) A dataset containing a table of good time intervals.