ASTROSAT CZTI

Data Quality Report

Orbit 57961

Creation date: 2026-06-15T02:16:25.035163
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_031T01_9000006584_57961cztM0_level2.fits modeM0/AS1A14_031T01_9000006584_57961cztM0_level2_quad_clean.evt
Size (bytes)489,859,20092,937,600
Size467.2 MB 88.6 MB
Events in quadrant A3,577,514626,125
Events in quadrant B4,647,979640,470
Events in quadrant C3,349,009601,099
Events in quadrant D6,063,121500,924

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151662
B0182542
C0144612
D0224612

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63771642.571742%
B63775408.467932%
C6377550.862475%
D637773311.494433%

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 7557 6379 96 96 1.27% 1.50%
B 7557 6379 395 395 5.23% 6.19%
C 7557 6379 37 37 0.49% 0.58%
D 7557 6377 686 686 9.08% 10.76%

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 10 251 711027 4091.78 701 684 173.6
A 3 14 50327 285.96 701 684 173.6
A 3 245 37666 213.03 701 684 173.6
B 10 128 1464287 9929.93 684 659 147.4
B 15 32 134153 905.69 684 659 147.4
B 5 185 50424 337.63 684 659 147.4
C 15 224 480279 2574.04 678 673 186.3
C 12 252 75980 404.17 678 673 186.3
C 1 16 71877 382.15 678 673 186.3
D 12 110 2952362 16126.99 641 611 183.0
D 8 240 198223 1079.66 641 611 183.0
D 2 249 133021 723.43 641 611 183.0

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