ASTROSAT CZTI

Data Quality Report

Orbit 55551

Creation date: 2026-01-03T23:26:20.125123
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_021T06_9000006538_55551cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55551cztM0_level2_quad_clean.evt
Size (bytes)510,433,92098,343,360
Size486.8 MB 93.8 MB
Events in quadrant A4,507,515638,126
Events in quadrant B3,548,239712,619
Events in quadrant C5,538,754553,462
Events in quadrant D4,741,995573,160

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0186661
B0159331
C0216295
D0192781

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71774696.534764%
B71771652.299011%
C717797313.557197%
D71774035.615160%

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 7527 7178 400 400 5.31% 5.57%
B 7527 7178 84 84 1.12% 1.17%
C 7526 7177 883 883 11.73% 12.30%
D 7527 7177 221 221 2.94% 3.08%

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 12 115 1074517 5922.14 733 716 181.3
A 15 32 329480 1813.17 733 716 181.3
A 3 78 139676 766.38 733 716 181.3
B 4 206 356959 2272.96 734 707 156.7
B 5 236 99820 632.36 734 707 156.7
B 10 247 89698 567.78 734 707 156.7
C 9 38 2286371 12357.62 673 665 185.0
C 1 16 244123 1316.25 673 665 185.0
C 6 223 140558 756.33 673 665 185.0
D 11 129 715335 3558.58 715 682 200.8
D 2 249 499583 2484.25 715 682 200.8
D 10 102 179835 892.08 715 682 200.8

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