ASTROSAT CZTI

Data Quality Report

Orbit 59255

Creation date: 2026-09-10T03:25:53.303850
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/AS1T05_271T01_9000006604_59255cztM0_level2.fits modeM0/AS1T05_271T01_9000006604_59255cztM0_level2_quad_clean.evt
Size (bytes)473,797,440103,507,200
Size451.8 MB 98.7 MB
Events in quadrant A3,997,623679,291
Events in quadrant B3,607,244731,805
Events in quadrant C3,560,004670,040
Events in quadrant D5,847,093580,945

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0164554
B0156112
C0153102
D0221872

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67721872.761370%
B67732583.809243%
C67731301.919386%
D67736619.759339%

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 9177 6776 72 72 0.78% 1.06%
B 9178 6777 75 75 0.82% 1.11%
C 9178 6777 48 48 0.52% 0.71%
D 9178 6777 522 522 5.69% 7.70%

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 24 615060 3297.64 765 748 186.3
A 15 233 233463 1249.22 765 748 186.3
A 10 251 98488 524.67 765 748 186.3
B 4 236 242792 1482.04 759 731 163.3
B 4 201 155316 946.46 759 731 163.3
B 10 247 138780 845.22 759 731 163.3
C 12 252 497548 2370.14 765 758 209.6
C 14 254 23932 110.56 765 758 209.6
C 6 13 15245 69.12 765 758 209.6
D 12 110 1912778 9203.54 733 700 207.8
D 8 160 613814 2951.15 733 700 207.8
D 2 249 140057 670.78 733 700 207.8

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

TCT plots

Parameter TCT0 TCT_healed
Tct