ASTROSAT CZTI

Data Quality Report

Orbit 57442

Creation date: 2026-05-11T05:02:21.710482
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_102T01_9000006572_57442cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57442cztM0_level2_quad_clean.evt
Size (bytes)587,528,640102,170,880
Size560.3 MB 97.4 MB
Events in quadrant A3,679,011677,038
Events in quadrant B4,227,131720,836
Events in quadrant C6,371,237601,983
Events in quadrant D6,850,548537,434

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170440
B0183410
C0246160
D0260430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79951191.488430%
B79952573.214509%
C79956297.867417%
D799581910.243902%

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 8270 8270 22 22 0.27% 0.27%
B 8270 8270 44 44 0.53% 0.53%
C 8270 8270 508 508 6.14% 6.14%
D 8270 8270 740 740 8.95% 8.95%

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 10 251 211422 985.54 872 848 213.7
A 3 14 45289 207.99 872 848 213.7
A 7 64 23267 104.92 872 848 213.7
B 4 171 428311 2318.56 860 827 184.4
B 10 247 110199 593.2 860 827 184.4
B 7 252 88731 476.77 860 827 184.4
C 15 224 2985664 13450.12 818 809 221.9
C 1 16 45065 199.42 818 809 221.9
C 14 67 37079 163.44 818 809 221.9
D 15 142 1228577 5466.85 799 761 224.6
D 2 249 939212 4178.45 799 761 224.6
D 3 12 664066 2953.36 799 761 224.6

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