ASTROSAT CZTI

Data Quality Report

Orbit 55928

Creation date: 2026-02-04T19:35:52.860762
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_55928cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55928cztM0_level2_quad_clean.evt
Size (bytes)553,590,72091,396,800
Size527.9 MB 87.2 MB
Events in quadrant A5,189,986564,605
Events in quadrant B2,877,613679,168
Events in quadrant C5,257,177571,863
Events in quadrant D6,642,439481,019

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0204342
B0139652
C0206402
D0245122

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A675971210.534103%
B6759781.154017%
C67594937.293978%
D6759109816.245007%

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 7574 6760 720 720 9.51% 10.65%
B 7574 6759 15 15 0.20% 0.22%
C 7574 6760 549 549 7.25% 8.12%
D 7574 6759 1096 1096 14.47% 16.22%

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 2117879 12581.46 679 661 168.3
A 4 249 256061 1517.7 679 661 168.3
A 7 64 54565 320.32 679 661 168.3
B 9 251 51616 343.03 695 670 148.5
B 12 111 18187 117.95 695 670 148.5
B 11 111 17019 110.08 695 670 148.5
C 13 3 1973610 10669.13 669 662 184.9
C 12 252 458794 2477.44 669 662 184.9
C 15 199 152160 819.25 669 662 184.9
D 11 129 3795362 21791.01 611 584 174.1
D 2 62 143718 821.93 611 584 174.1
D 6 31 141117 806.99 611 584 174.1

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