ASTROSAT CZTI

Data Quality Report

Orbit 56798

Creation date: 2026-03-28T20:48:01.453455
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_083T03_9000006562_56798cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56798cztM0_level2_quad_clean.evt
Size (bytes)509,520,96082,906,560
Size485.9 MB 79.1 MB
Events in quadrant A2,905,501578,067
Events in quadrant B4,531,073590,785
Events in quadrant C8,059,247396,793
Events in quadrant D2,898,481525,898

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0131111
B0176551
C0280691
D0129271

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59941552.585919%
B59945268.775442%
C5995195232.560467%
D5995761.267723%

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 7064 5994 74 74 1.05% 1.23%
B 7064 5994 309 309 4.37% 5.16%
C 7064 5994 1934 1934 27.38% 32.27%
D 7065 5995 27 27 0.38% 0.45%

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 10 251 190039 1176.3 651 634 161.0
A 3 62 138772 857.9 651 634 161.0
A 14 235 15280 90.96 651 634 161.0
B 4 206 1020255 7624.57 624 601 133.7
B 8 128 325675 2430.77 624 601 133.7
B 2 249 245159 1828.71 624 601 133.7
C 15 230 3910320 26628.46 535 530 146.8
C 13 3 1715144 11677.74 535 530 146.8
C 9 38 183886 1248.79 535 530 146.8
D 2 249 112751 634.69 628 600 176.7
D 3 176 75647 424.71 628 600 176.7
D 10 199 72568 407.29 628 600 176.7

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