ASTROSAT CZTI

Data Quality Report

Orbit 55624

Creation date: 2026-01-09T20:51:08.364084
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_021T06_9000006538_55624cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55624cztM0_level2_quad_clean.evt
Size (bytes)585,792,00092,897,280
Size558.7 MB 88.6 MB
Events in quadrant A8,261,890518,435
Events in quadrant B3,205,625687,882
Events in quadrant C3,442,224599,693
Events in quadrant D6,240,227527,235

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0292951
B0147951
C0157601
D0233031

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6880161023.401163%
B68801472.136628%
C68801552.252907%
D688071610.406977%

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 6910 6881 1467 1467 21.23% 21.32%
B 6910 6881 36 36 0.52% 0.52%
C 6910 6881 97 97 1.40% 1.41%
D 6910 6881 570 570 8.25% 8.28%

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 12 115 3784497 22726.18 673 656 166.5
A 8 249 815184 4892.15 673 656 166.5
A 15 32 658323 3950.02 673 656 166.5
B 5 185 139901 909.23 716 689 153.1
B 4 67 68879 445.37 716 689 153.1
B 0 199 41145 264.23 716 689 153.1
C 12 2 371350 1927.94 707 699 192.3
C 10 19 78774 406.11 707 699 192.3
C 6 223 50119 257.06 707 699 192.3
D 11 129 1684366 8655.49 693 661 194.5
D 8 245 1367933 7028.79 693 661 194.5
D 2 62 134483 687.94 693 661 194.5

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