ASTROSAT CZTI

Data Quality Report

Orbit 57420

Creation date: 2026-05-09T16:31:57.119305
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_57420cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57420cztM0_level2_quad_clean.evt
Size (bytes)501,439,68094,328,640
Size478.2 MB 90.0 MB
Events in quadrant A3,744,366625,070
Events in quadrant B3,138,340692,064
Events in quadrant C6,785,523521,485
Events in quadrant D4,375,565553,103

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0159321
B0141831
C0247591
D0177171

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66593014.520198%
B6659861.291485%
C6659124718.726536%
D66584426.638630%

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 7659 6659 185 185 2.42% 2.78%
B 7659 6659 15 15 0.20% 0.23%
C 7659 6659 1090 1090 14.23% 16.37%
D 7658 6658 337 337 4.40% 5.06%

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 829465 4714.44 714 695 175.8
A 7 64 109995 621.75 714 695 175.8
A 0 12 25117 138.92 714 695 175.8
B 5 185 71607 463.92 714 686 152.9
B 0 153 61936 400.66 714 686 152.9
B 0 63 35455 227.44 714 686 152.9
C 15 224 2841572 15996.17 646 642 177.6
C 6 223 1256369 7070.51 646 642 177.6
C 14 254 99973 559.29 646 642 177.6
D 7 96 754841 3906.49 685 653 193.1
D 8 240 382227 1976.45 685 653 193.1
D 2 249 261725 1352.28 685 653 193.1

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