ASTROSAT CZTI

Data Quality Report

Orbit 20210720_A10_094T27_9000004562_level2

Creation date: 2025-12-27T15:59:20.935844
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/AS1A10_094T27_9000004562cztM0_level2.fits modeM0/AS1A10_094T27_9000004562cztM0_level2_quad_clean.evt
Size (bytes)65,721,60090,930,240
Size62.7 MB 86.7 MB
Events in quadrant A404,974600,055
Events in quadrant B376,288586,808
Events in quadrant C373,540552,370
Events in quadrant D348,666527,534

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142310
B0210860
C0180260
D0171090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6987600.858738%
B69871121.602977%
C69876148.787749%
D69871562.232718%

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 7576 6986 0 0 0.00% 0.00%
B 7576 6986 0 0 0.00% 0.00%
C 7576 6973 0 0 0.00% 0.00%
D 7577 6985 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 29 364 9.51 105 99 27.9
A 7 110 329 8.25 105 99 27.9
A 15 236 295 7.03 105 99 27.9
B 2 9 298 9.27 99 95 21.9
B 3 17 266 7.81 99 95 21.9
B 2 8 265 7.76 99 95 21.9
C 12 241 279 7.06 98 92 26.5
C 1 81 275 6.91 98 92 26.5
C 9 242 267 6.6 98 92 26.5
D 3 14 273 6.43 99 90 28.5
D 6 231 250 5.62 99 90 28.5
D 4 160 250 5.62 99 90 28.5

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