ASTROSAT CZTI

Data Quality Report

Orbit 57164

Creation date: 2026-04-22T12:10:59.673667
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_070T08_9000006568_57164cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57164cztM0_level2_quad_clean.evt
Size (bytes)599,270,40099,371,520
Size571.5 MB 94.8 MB
Events in quadrant A3,236,394693,463
Events in quadrant B3,600,418733,584
Events in quadrant C7,407,810534,222
Events in quadrant D7,363,904533,075

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153242
B0161682
C0271352
D0270072

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A73881251.691933%
B73882673.613969%
C7388167722.698971%
D7388125016.919329%

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 7778 7390 12 12 0.15% 0.16%
B 7778 7390 46 46 0.59% 0.62%
C 7778 7390 1104 1104 14.19% 14.94%
D 7778 7390 787 787 10.12% 10.65%

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 0 12 64888 328.29 791 771 195.3
A 8 6 32868 164.34 791 771 195.3
A 10 251 24577 121.89 791 771 195.3
B 10 16 141500 840.18 781 751 167.5
B 0 213 92974 550.51 781 751 167.5
B 10 247 37216 217.67 781 751 167.5
C 15 224 3166178 16901.57 688 680 187.3
C 15 198 1170978 6248.58 688 680 187.3
C 9 38 110075 584.09 688 680 187.3
D 12 33 3443483 16997.79 715 681 202.5
D 2 249 219193 1078.84 715 681 202.5
D 7 96 152730 750.7 715 681 202.5

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