ASTROSAT CZTI

Data Quality Report

Orbit 57690

Creation date: 2026-05-27T21:19:28.610500
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_125T09_9000006578_57690cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57690cztM0_level2_quad_clean.evt
Size (bytes)546,805,440103,708,800
Size521.5 MB 98.9 MB
Events in quadrant A4,030,706692,248
Events in quadrant B3,680,272736,731
Events in quadrant C7,231,027598,018
Events in quadrant D4,736,330607,960

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0166920
B0161621
C0264950
D0190550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7250781.075862%
B72501371.889655%
C725094212.993103%
D72502954.068966%

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 7250 7250 49 49 0.68% 0.68%
B 7250 7250 60 60 0.83% 0.83%
C 7250 7250 797 797 10.99% 10.99%
D 7250 7250 312 312 4.30% 4.30%

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 3 14 502409 2565.77 791 771 195.5
A 7 160 231021 1177.68 791 771 195.5
A 7 223 63751 322.13 791 771 195.5
B 5 185 283514 1661.56 780 749 170.2
B 10 247 114146 666.33 780 749 170.2
B 0 171 62695 364.0 780 749 170.2
C 15 224 1607706 8129.08 728 723 197.7
C 12 254 1598141 8080.69 728 723 197.7
C 12 252 426190 2152.27 728 723 197.7
D 8 240 877183 4126.69 756 723 212.4
D 8 160 430896 2025.41 756 723 212.4
D 2 120 116032 542.92 756 723 212.4

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