ASTROSAT CZTI

Data Quality Report

Orbit 57402

Creation date: 2026-05-08T13:34:02.606672
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_102T01_9000006572_57402cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57402cztM0_level2_quad_clean.evt
Size (bytes)1,517,829,120272,462,400
Size1.4 GB 259.8 MB
Events in quadrant A10,169,6441,855,668
Events in quadrant B9,611,7291,985,707
Events in quadrant C23,656,1061,378,795
Events in quadrant D11,195,4671,647,336

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0445804
B0432034
C0841934
D0475444

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04080
B04080
C04080
D04080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A200583041.515605%
B200593911.949250%
C20059494224.637320%
D200585212.597467%

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 21338 20063 75 75 0.35% 0.37%
B 21339 20064 42 42 0.20% 0.21%
C 21339 20064 3643 3643 17.07% 18.16%
D 21338 20063 293 293 1.37% 1.46%

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 0 12 717068 1345.63 2171 2115 531.3
A 8 227 559112 1048.34 2171 2115 531.3
A 3 14 276878 517.14 2171 2115 531.3
B 0 216 358439 770.26 2155 2067 462.7
B 0 245 134528 286.3 2155 2067 462.7
B 5 185 132649 282.24 2155 2067 462.7
C 15 224 14398107 28357.5 1883 1865 507.7
C 12 252 412800 809.45 1883 1865 507.7
C 6 223 411470 806.83 1883 1865 507.7
D 8 240 1011831 1731.13 2101 2010 583.3
D 7 96 650642 1111.95 2101 2010 583.3
D 2 249 260845 443.72 2101 2010 583.3

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