ASTROSAT CZTI

Data Quality Report

Orbit 57674

Creation date: 2026-05-26T19:14:42.558376
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_125T09_9000006578_57674cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57674cztM0_level2_quad_clean.evt
Size (bytes)455,855,040110,442,240
Size434.7 MB 105.3 MB
Events in quadrant A3,315,350727,141
Events in quadrant B3,699,080775,902
Events in quadrant C5,467,782658,935
Events in quadrant D3,799,314651,500

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154740
B0164310
C0215380
D0165630

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A762270.091839%
B7623961.259347%
C76234736.204906%
D7622680.892154%

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 7622 7622 3 3 0.04% 0.04%
B 7623 7623 41 41 0.54% 0.54%
C 7623 7623 466 466 6.11% 6.11%
D 7622 7622 62 62 0.81% 0.81%

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 3 14 62855 305.25 822 800 203.3
A 4 95 45139 218.1 822 800 203.3
A 10 251 17430 81.8 822 800 203.3
B 5 185 173089 979.74 809 776 175.9
B 0 213 156289 884.22 809 776 175.9
B 10 247 65216 366.39 809 776 175.9
C 12 2 1311700 6237.96 775 768 210.2
C 15 224 886484 4214.6 775 768 210.2
C 14 96 66563 313.08 775 768 210.2
D 2 120 152084 670.36 799 763 225.7
D 8 240 151251 666.67 799 763 225.7
D 2 31 76612 336.02 799 763 225.7

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