ASTROSAT CZTI

Data Quality Report

Orbit 55724

Creation date: 2026-01-16T11:23:03.526625
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_099T04_9000006540_55724cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55724cztM0_level2_quad_clean.evt
Size (bytes)659,272,32080,784,000
Size628.7 MB 77.0 MB
Events in quadrant A7,635,514485,960
Events in quadrant B2,626,175626,921
Events in quadrant C4,850,766525,973
Events in quadrant D8,810,261373,518

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270131
B0127371
C0188281
D0304991

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6211127220.479794%
B62111091.754951%
C62126069.755312%
D6212210133.821636%

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 7141 6212 993 993 13.91% 15.99%
B 7141 6212 3 3 0.04% 0.05%
C 7142 6212 452 452 6.33% 7.28%
D 7142 6213 1770 1770 24.78% 28.49%

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 15 32 4432418 30154.35 604 590 147.0
A 7 64 269885 1832.3 604 590 147.0
A 0 8 257119 1745.43 604 590 147.0
B 12 111 17311 118.97 652 629 140.2
B 11 111 16064 110.08 652 629 140.2
B 14 111 15803 108.22 652 629 140.2
C 15 199 1215133 7267.82 609 603 167.1
C 13 3 626727 3746.76 609 603 167.1
C 14 96 281430 1680.48 609 603 167.1
D 11 129 6519966 43995.43 524 500 148.2
D 8 245 125791 845.5 524 500 148.2
D 7 129 36441 242.54 524 500 148.2

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