ASTROSAT CZTI

Data Quality Report

Orbit 55902

Creation date: 2026-01-30T17:09:53.983117
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_030T02_9000006544_55902cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55902cztM0_level2_quad_clean.evt
Size (bytes)644,351,040122,872,320
Size614.5 MB 117.2 MB
Events in quadrant A4,678,122804,223
Events in quadrant B4,036,753884,525
Events in quadrant C5,515,572768,886
Events in quadrant D8,929,414643,676

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205370
B0187150
C0227460
D0327260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A89171932.164405%
B8917480.538298%
C89173423.835371%
D8917126614.197600%

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 8917 8917 174 174 1.95% 1.95%
B 8917 8917 19 19 0.21% 0.21%
C 8917 8917 216 216 2.42% 2.42%
D 8917 8917 1138 1138 12.76% 12.76%

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 4 249 726579 3184.5 927 899 227.9
A 15 32 217444 950.26 927 899 227.9
A 3 62 50215 216.41 927 899 227.9
B 7 252 113343 561.86 932 896 200.1
B 0 199 79357 392.05 932 896 200.1
B 5 185 49384 242.28 932 896 200.1
C 12 252 1097730 4477.71 903 896 245.0
C 13 3 403323 1642.87 903 896 245.0
C 15 199 331198 1348.42 903 896 245.0
D 11 129 4227513 17614.18 858 821 240.0
D 6 31 467275 1943.89 858 821 240.0
D 2 31 438466 1823.83 858 821 240.0

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