ASTROSAT CZTI

Data Quality Report

Orbit 55507

Creation date: 2026-01-02T11:58:34.237133
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_099T01_9000006536_55507cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55507cztM0_level2_quad_clean.evt
Size (bytes)697,181,76087,189,120
Size664.9 MB 83.2 MB
Events in quadrant A3,130,313646,235
Events in quadrant B8,770,446476,465
Events in quadrant C6,954,149540,634
Events in quadrant D6,425,496502,897

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144321
B0308531
C0254321
D0237391

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6791791.163304%
B6792231434.069494%
C6792104415.371025%
D6792103615.253239%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7421 6792 18 18 0.24% 0.27%
B 7422 6793 1476 1476 19.89% 21.73%
C 7422 6793 837 837 11.28% 12.32%
D 7422 6793 947 947 12.76% 13.94%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 31 133717 742.33 722 701 179.2
A 0 8 83050 459.57 722 701 179.2
A 12 115 30085 163.98 722 701 179.2
B 5 172 6243750 48657.22 601 577 128.3
B 10 247 57617 444.55 601 577 128.3
B 7 252 35252 270.25 601 577 128.3
C 9 38 3086564 17021.31 668 662 181.3
C 12 252 567212 3124.99 668 662 181.3
C 13 3 264334 1454.37 668 662 181.3
D 11 129 3178436 17001.0 657 629 186.9
D 3 12 135748 722.88 657 629 186.9
D 6 239 88826 471.85 657 629 186.9

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter