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Дата изменения: Tue Sep 20 19:45:20 2011
Дата индексирования: Mon Apr 11 03:18:35 2016
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Поисковые слова: comet tail

Calibration Access and Data Handbook

Description

Not Used. It was meant to hold data about the calibration sources. One extension per CCD containing intensity distribution as events / second in RAWX/RAWY coordinates One extension per CCD containing spectra in PI units per CCD additional keywords provide a reference time and half life constants to correct for time-dependent count rate.

The CCF contains one table:

CALSOURCEREGIONS:

Attributes:

None.

Columns:

CCD_ID:

CCD index number (1-7).

N_PEAKS:

number of peaks in cal source spectrum.

PHA_SEARCH_LO:

vector column of length N_PEAKS; lower PHA channel bound to bracket the peak.

PHA_SEARCH_HI:

vector column of length N_PEAKS; upper PHA channel bound to bracket the peak.

PHA_CALC_RANGE:

???

EXPECTED_COUNT_RATE:

expected count rate from peak (units?) .