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.

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''