ASTROSAT CZTI

Data Quality Report

Orbit 20210620_A10_071T42_9000004476_level2

Creation date: 2025-12-27T03:50:45.963304
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/AS1A10_071T42_9000004476cztM0_level2.fits modeM0/AS1A10_071T42_9000004476cztM0_level2_quad_clean.evt
Size (bytes)781,099,200521,153,280
Size744.9 MB 497.0 MB
Events in quadrant A4,909,5822,750,891
Events in quadrant B4,577,3082,709,118
Events in quadrant C4,662,9702,573,466
Events in quadrant D4,150,7322,392,550

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015920
B015920
C015920
D015920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01626550
B02421170
C01800180
D01787240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7808311281.444617%
B7808324883.186353%
C7808326023.332351%
D7808313911.781438%

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 91009 78073 0 0 0.00% 0.00%
B 91009 78057 0 0 0.00% 0.00%
C 91009 78074 0 0 0.00% 0.00%
D 91009 78065 0 0 0.00% 0.00%

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 29 4887 11.87 1277 1197 310.8
A 7 110 3788 8.34 1277 1197 310.8
A 0 30 3715 8.1 1277 1197 310.8
B 2 9 3600 10.27 1211 1158 237.8
B 5 232 3096 8.15 1211 1158 237.8
B 3 80 3077 8.07 1211 1158 237.8
C 1 81 3680 8.12 1232 1156 310.8
C 1 80 3629 7.96 1232 1156 310.8
C 12 241 3300 6.9 1232 1156 310.8
D 6 67 2947 5.91 1186 1079 315.9
D 7 3 2940 5.89 1186 1079 315.9
D 15 47 2900 5.76 1186 1079 315.9

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