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j_ima_shadowgram

This executable reads the events from the imaging formats (FULL or REST) and sorts them according to their position into a 2D histogram - the shadowgram. The grey filter and dead time combined correction factor is evaluated at this step and brought as keyword in the FITS representation of the shadowgram.
TELAPSE time interval from beginning to end of data window
ONTIME sum of the good-time-intervals (GTI)
EXPOSURE ONTIME corrected for greyfilter and deadtime
DEADC effective fraction surviving when only dead time is considered

An example of a shadowgram with a very strong on-axis source is shown in Fig. 23. The central part of the mask is imaged on the detector and the similarity with the mask pattern (Fig. 5) can be noticed.

Figure 23: A shadowgram with a strong on-axis source and negligible background.
Image strongshd_std

Table 14: j_image_bin parameters included into the main script
     
Name Name Type Description
(main script) (executable)    
nChanBins nChanBins integer Number of energy-resolved shadowgrams to create. If , shadowgrams are created in standard bands.

possible values: -7 - 100

default: 4

chanLow chanLow string Lower channel boundaries for shadowgrams

default: ``46 83 129 160''

chanHigh chanHigh string Upper channel boundaries for shadowgrams

default: ``82 128 159 223''

timeStart timeStart real Start of time interval [IJD]

(-1 - use swgDOL bounds)

default: -1.

timeStop timeStop real End of time interval [IJD]

(-1 - use swgDOL bounds)

default: -1.

BIN_I_evtType evtType integer Event type

possible values:

0 - FULL,

1 - REST,

-1 - both

default: -1

BIN_I_shdType shdType integer Type of shadowgram

possible values:

1 - standard

2 - raw-standard

3 - regular

default: 2

BIN_I_shdRes shdRes string DOL of the output shadowgrams

default: `` ''

BIN_I_rowSelect rowSelect string CFITSIO selection string on events

default: ``&&STATUS 256''[*]

BIN_I_gtiNames gtiNames string Names of GTI tables to be used

default: `` ''

BIN_I_chanLowDet chanLowDet string Three lower channel boundaries for shadowgrams for source detection

default: ``46 96 135''

BIN_I_chanHighDet chanHighDet string Three upper channel boundaries for shadowgrams for source detection

default: ``95 134 178''


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