ASTROSAT CZTI

Data Quality Report

Orbit 20211209_A11_037T01_9000004806_level2

Creation date: 2025-12-30T20:33:14.500381
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/AS1A11_037T01_9000004806cztM0_level2.fits modeM0/AS1A11_037T01_9000004806cztM0_level2_quad_clean.evt
Size (bytes)241,752,960282,625,920
Size230.6 MB 269.5 MB
Events in quadrant A1,491,9401,833,774
Events in quadrant B1,403,6381,800,060
Events in quadrant C1,468,5901,747,626
Events in quadrant D1,202,0661,423,508

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01070
B01070
C01070
D01080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0513510
B0711370
C0628090
D0998580

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05200
B05200
C05200
D05200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A25498240.094125%
B2549812755.000392%
C254985502.157032%
D25498275210.793003%

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 34825 25496 0 0 0.00% 0.00%
B 34825 25487 0 0 0.00% 0.00%
C 34825 25486 0 0 0.00% 0.00%
D 34825 25472 0 0 0.00% 0.00%

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 29 1232 8.91 389 368 96.9
A 9 19 1216 8.75 389 368 96.9
A 7 110 1203 8.61 389 368 96.9
B 2 9 1242 11.85 373 357 74.7
B 3 80 1102 9.97 373 357 74.7
B 2 8 1040 9.14 373 357 74.7
C 1 81 1298 9.38 388 368 99.2
C 1 80 1261 9.01 388 368 99.2
C 3 187 1045 6.83 388 368 99.2
D 4 160 952 6.77 344 315 94.0
D 10 113 934 6.58 344 315 94.0
D 6 62 906 6.29 344 315 94.0

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