ASTROSAT CZTI

Data Quality Report

Orbit 57686

Creation date: 2026-05-27T14:24:24.855038
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_125T09_9000006578_57686cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57686cztM0_level2_quad_clean.evt
Size (bytes)470,695,68090,737,280
Size448.9 MB 86.5 MB
Events in quadrant A2,845,012612,553
Events in quadrant B3,902,163642,577
Events in quadrant C4,301,826568,041
Events in quadrant D5,889,789488,594

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0129181
B0160511
C0171071
D0217851

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6238741.186278%
B62393455.529732%
C62393625.802212%
D623983413.367527%

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 7178 6240 2 2 0.03% 0.03%
B 7179 6241 152 152 2.12% 2.44%
C 7179 6241 229 229 3.19% 3.67%
D 7179 6241 706 706 9.83% 11.31%

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 3 14 100809 596.89 685 669 167.8
A 3 245 36912 216.03 685 669 167.8
A 3 94 21929 126.72 685 669 167.8
B 5 185 1031332 7238.9 667 640 142.4
B 10 16 66331 461.37 667 640 142.4
B 10 246 54220 376.31 667 640 142.4
C 15 224 614117 3427.11 659 652 179.0
C 6 223 347275 1936.4 659 652 179.0
C 14 254 272522 1518.79 659 652 179.0
D 8 240 1561121 8821.84 628 598 176.9
D 8 160 1445294 8167.05 628 598 176.9
D 2 120 114335 642.97 628 598 176.9

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