ASTROSAT CZTI

Data Quality Report

Orbit 56882

Creation date: 2026-04-03T12:07:11.632385
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_083T03_9000006562_56882cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56882cztM0_level2_quad_clean.evt
Size (bytes)615,867,840112,351,680
Size587.3 MB 107.1 MB
Events in quadrant A4,772,729756,239
Events in quadrant B4,204,963791,580
Events in quadrant C4,039,633729,916
Events in quadrant D9,158,441567,534

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0199874
B0184482
C0178174
D0326712

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80072342.922443%
B80073974.958162%
C80061762.198351%
D8007173621.681029%

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 9867 8009 115 115 1.17% 1.44%
B 9867 8009 194 194 1.97% 2.42%
C 9867 8009 66 66 0.67% 0.82%
D 9867 8009 1751 1751 17.75% 21.86%

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 7 64 763629 3593.07 858 838 212.3
A 3 14 334294 1570.72 858 838 212.3
A 3 62 189734 889.78 858 838 212.3
B 10 16 687149 3885.09 826 796 176.7
B 5 185 52455 292.42 826 796 176.7
B 0 197 32947 181.99 826 796 176.7
C 13 3 329379 1433.39 842 836 229.2
C 14 254 97010 419.59 842 836 229.2
C 7 220 72576 312.99 842 836 229.2
D 2 249 2846189 13238.35 765 729 214.9
D 8 240 2285300 10628.85 765 729 214.9
D 8 160 433916 2015.38 765 729 214.9

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