ASTROSAT CZTI

Data Quality Report

Orbit 56409

Creation date: 2026-03-02T17:49:28.499526
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_083T05_9000006554_56409cztM0_level2.fits modeM0/AS1A14_083T05_9000006554_56409cztM0_level2_quad_clean.evt
Size (bytes)1,008,074,88085,239,360
Size961.4 MB 81.3 MB
Events in quadrant A11,702,997537,105
Events in quadrant B5,912,187732,092
Events in quadrant C4,301,945709,709
Events in quadrant D14,786,24253,408

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01600
C01600
D01600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0402291
B0230231
C0185731
D0494251

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7885258432.771084%
B788597212.327204%
C78851802.282815%
D7885731092.707673%

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 7885 7885 2139 2139 27.13% 27.13%
B 7885 7885 573 573 7.27% 7.27%
C 7885 7885 126 126 1.60% 1.60%
D 7885 7885 4230 4230 53.65% 53.65%

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 12 3 4447136 23789.21 755 733 186.9
A 4 95 3188628 17055.92 755 733 186.9
A 12 194 588118 3142.64 755 733 186.9
B 4 206 2139952 12076.68 827 794 177.1
B 0 213 137680 772.79 827 794 177.1
B 5 172 73367 409.71 827 794 177.1
C 12 254 609432 2651.65 843 836 229.5
C 5 250 219808 954.06 843 836 229.5
C 12 252 68529 294.94 843 836 229.5
D 8 129 13700222 281773.51 163 155 48.6
D 2 31 116181 2386.34 163 155 48.6
D 5 38 108800 2234.54 163 155 48.6

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