ASTROSAT CZTI

Data Quality Report

Orbit 56221

Creation date: 2026-02-18T01:36:21.321893
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_083T04_9000006550_56221cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56221cztM0_level2_quad_clean.evt
Size (bytes)736,675,20082,094,400
Size702.5 MB 78.3 MB
Events in quadrant A13,018,000331,529
Events in quadrant B4,000,403631,275
Events in quadrant C4,610,876538,774
Events in quadrant D5,086,911486,646

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0436920
B0169940
C0187880
D0202230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7139353849.558762%
B71392173.039641%
C71402773.879552%
D71403725.210084%

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 7418 7227 3433 3433 46.28% 47.50%
B 7419 7419 140 140 1.89% 1.89%
C 7420 7420 305 305 4.11% 4.11%
D 7420 7414 402 402 5.42% 5.42%

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 7026907 47793.81 584 568 147.0
A 8 176 3225942 21939.29 584 568 147.0
A 10 251 199151 1350.78 584 568 147.0
B 5 185 462684 2967.31 731 706 155.7
B 0 213 176673 1130.24 731 706 155.7
B 0 171 124314 793.94 731 706 155.7
C 12 254 1150899 5986.19 702 696 192.1
C 12 252 310340 1611.53 702 696 192.1
C 9 38 121632 629.41 702 696 192.1
D 2 249 678482 3396.5 696 664 199.6
D 6 239 457778 2290.57 696 664 199.6
D 14 52 270766 1353.46 696 664 199.6

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