ASTROSAT CZTI

Data Quality Report

Orbit 55768

Creation date: 2026-01-19T14:20:10.215751
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_099T04_9000006540_55768cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55768cztM0_level2_quad_clean.evt
Size (bytes)693,377,28083,252,160
Size661.3 MB 79.4 MB
Events in quadrant A9,867,309411,026
Events in quadrant B3,228,407647,808
Events in quadrant C2,963,392595,865
Events in quadrant D9,101,006410,269

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0338761
B0142311
C0140501
D0315291

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6528236636.243873%
B65281662.542892%
C65291281.960484%
D6529202731.046102%

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 7298 6528 2121 2121 29.06% 32.49%
B 7298 6528 6 6 0.08% 0.09%
C 7299 6530 60 60 0.82% 0.92%
D 7299 6529 2005 2005 27.47% 30.71%

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 15 32 5828416 40326.93 590 574 144.5
A 7 64 785328 5430.26 590 574 144.5
A 12 115 349244 2412.69 590 574 144.5
B 5 172 366497 2486.31 681 655 147.1
B 0 199 72654 489.32 681 655 147.1
B 9 251 23551 155.6 681 655 147.1
C 10 22 198729 1074.78 672 662 184.3
C 12 250 31508 167.38 672 662 184.3
C 14 254 27605 146.2 672 662 184.3
D 7 70 5322230 31007.21 604 575 171.6
D 11 129 521669 3036.21 604 575 171.6
D 9 102 324546 1887.65 604 575 171.6

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