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Дата изменения: Thu Jun 29 01:34:48 2006
Дата индексирования: Sat Dec 22 08:31:09 2007
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Поисковые слова: углеродная датировка

XMM-Newton Science Analysis System


lccorr (lccorr-2.27.1) [xmmsas_20060628_1801-7.0.0]

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Input Files

1. (Mandatory) A source timeseries dataset created by evselect. The header must contain the following keywords:
   • INSTRUME - either `EMOS1', `EMOS2' or `EPN'

   The dataset must contain a binary table extension named RATE which must contain the following keywords:

   • E_MIN, E_MAX - energy interval of the TS.
   • E_UNITS - units of the previous, either `eV' or `keV'.
   • TIMEUNIT - eg `s'.
   • MJDREF

   The RATE extension must contain either a column COUNTS, recording the integer number of events occurring in the bin, or a column RATE recording the number of events in the bin divided by the bin duration in seconds. Both these columns may be of any numeric data type. If the RATE extension contains no TIME column then it must contain a either a TIMEDEL keyword or column, also an intelligible subset of TIMEZERI, TIMEZERF and TIMEZERO to denote the time of the centre of the first bin. Selection-region and GTI information must be stored in a data subspace (DSS) of this RATE extension.

2. (Optional) A background timeseries dataset, also created by evselect. If it is supplied it must have the same specifications as the source TS, and the values of the mandatory keywords must be the same.

3. (Mandatory) A calibrated event list for the relevant EPIC camera, created by either emchain or epchain. The header must contain the following keywords:
   • INSTRUME - must be the same value as the TS one.
   • FILTER

   The event list must contain the binary table extension EVENTS, which must contain the following keywords:

   • TIMEUNIT - must be the same value as the TS one.
   • MJDREF - must be the same value as the TS one.
   The event list must contain at least one binary table extension EXPOSUnn, where nn indicates the ccd/node. Each of these extensions must contain the following keywords:
   • WINDOWX0
   • WINDOWY0
   • WINDOWDX
   • WINDOWDY
   • Any other keywords needed to set the state of the cal via a call to CAL_setState.
   • an intelligible subset of TIMEZERI, TIMEZERF and TIMEZERO
   The EXPOSUnn extensions need not contain any columns, but correct exposure calculations cannot be performed unless each relevant extension (ie, each one corresponding to a ccd within the collection region) contains the following columns:
   • FRACEXP - real32.
   • TIMEDEL - real32.
   • TIME - real64.
   If the event list contains BADPIXnn extensions (not mandatory), these must contain the following columns:
   • RAWX - int16.
   • RAWY - int16.
   • YEXTENT - int16.