ASTROSAT CZTI

Data Quality Report

Orbit 57872

Creation date: 2026-06-09T02:09:41.806240
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_125T11_9000006582_57872cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57872cztM0_level2_quad_clean.evt
Size (bytes)422,539,20093,314,880
Size403.0 MB 89.0 MB
Events in quadrant A2,800,137625,816
Events in quadrant B3,177,534661,284
Events in quadrant C4,186,895571,073
Events in quadrant D4,993,804534,177

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0127992
B0139632
C0168472
D0191052

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A620970.112740%
B6209951.530037%
C62092473.978096%
D62093024.863907%

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 7414 6210 4 4 0.05% 0.06%
B 7414 6210 72 72 0.97% 1.16%
C 7414 6210 261 261 3.52% 4.20%
D 7414 6210 333 333 4.49% 5.36%

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 7 64 122428 734.7 672 657 165.7
A 3 128 32911 194.6 672 657 165.7
A 3 14 18779 109.34 672 657 165.7
B 5 185 215143 1512.99 663 639 141.8
B 5 172 130897 918.77 663 639 141.8
B 0 63 58398 407.4 663 639 141.8
C 15 224 1225411 7088.79 632 623 172.8
C 2 12 267979 1547.4 632 623 172.8
C 6 223 98814 568.31 632 623 172.8
D 2 153 1138880 6352.04 630 599 179.2
D 12 110 849462 4736.98 630 599 179.2
D 3 12 193589 1076.96 630 599 179.2

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