ASTROSAT CZTI

Data Quality Report

Orbit 57426

Creation date: 2026-05-10T02:57:22.686955
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_57426cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57426cztM0_level2_quad_clean.evt
Size (bytes)539,138,880101,977,920
Size514.2 MB 97.3 MB
Events in quadrant A5,285,824662,479
Events in quadrant B3,675,367721,496
Events in quadrant C5,658,252611,227
Events in quadrant D4,781,513593,279

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205892
B0160521
C0218261
D0192161

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71682833.948103%
B71681191.660156%
C71685097.101004%
D71683364.687500%

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 7478 7169 159 159 2.13% 2.22%
B 7478 7169 21 21 0.28% 0.29%
C 7478 7169 455 455 6.08% 6.35%
D 7478 7169 282 282 3.77% 3.93%

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 1153964 6145.91 762 743 187.6
A 8 4 877256 4671.24 762 743 187.6
A 10 251 133637 708.24 762 743 187.6
B 0 216 357624 2202.87 758 728 162.0
B 5 185 96475 590.98 758 728 162.0
B 0 245 43324 262.92 758 728 162.0
C 15 224 2115007 10814.71 717 710 195.5
C 6 223 426415 2177.5 717 710 195.5
C 14 254 202276 1031.02 717 710 195.5
D 7 96 603650 2932.88 729 696 205.6
D 8 240 467028 2268.33 729 696 205.6
D 15 142 339114 1646.13 729 696 205.6

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