ASTROSAT CZTI

Data Quality Report

Orbit 55572

Creation date: 2026-01-05T12:39:18.422812
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_55572cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55572cztM0_level2_quad_clean.evt
Size (bytes)604,117,44094,867,200
Size576.1 MB 90.5 MB
Events in quadrant A4,308,479627,102
Events in quadrant B3,019,170698,502
Events in quadrant C9,969,375491,362
Events in quadrant D4,514,708561,307

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180582
B0146332
C03454815
D0187732

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70992773.901958%
B7099570.802930%
C7097183625.870086%
D71003695.197183%

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 8589 7102 233 233 2.71% 3.28%
B 8589 7102 5 5 0.06% 0.07%
C 8590 7102 1831 1831 21.32% 25.78%
D 8590 7103 340 340 3.96% 4.79%

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 883767 4933.67 720 702 179.0
A 15 32 312131 1739.95 720 702 179.0
A 0 8 114510 635.84 720 702 179.0
B 5 172 50983 323.6 721 695 155.4
B 10 247 39310 248.48 721 695 155.4
B 4 169 24204 151.28 721 695 155.4
C 9 38 6704335 37052.49 659 650 180.9
C 12 252 398454 2198.73 659 650 180.9
C 13 3 78362 429.53 659 650 180.9
D 11 129 1607625 8208.95 691 660 195.8
D 5 173 61183 309.17 691 660 195.8
D 2 31 46968 236.56 691 660 195.8

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