ASTROSAT CZTI

Data Quality Report

Orbit 57696

Creation date: 2026-05-28T06:08:48.192431
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_57696cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57696cztM0_level2_quad_clean.evt
Size (bytes)583,303,68090,293,760
Size556.3 MB 86.1 MB
Events in quadrant A2,829,915644,755
Events in quadrant B3,472,934677,438
Events in quadrant C3,797,549602,087
Events in quadrant D10,983,487353,320

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0133012
B0149782
C0157962
D0371782

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6540140.214067%
B65401912.920489%
C65401101.681957%
D6540268040.978593%

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 7625 6541 4 4 0.05% 0.06%
B 7625 6541 90 90 1.18% 1.38%
C 7625 6541 89 89 1.17% 1.36%
D 7625 6540 2732 2732 35.83% 41.77%

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 25069 138.19 711 693 176.4
A 3 128 24523 135.09 711 693 176.4
A 3 245 15553 84.24 711 693 176.4
B 10 16 420878 2852.35 695 669 147.3
B 4 142 60540 406.4 695 669 147.3
B 10 247 37452 249.68 695 669 147.3
C 15 224 672587 3587.63 685 680 187.3
C 14 246 152433 810.28 685 680 187.3
C 14 67 84005 444.91 685 680 187.3
D 8 240 8656720 58690.87 514 489 147.5
D 8 160 66961 450.69 514 489 147.5
D 2 31 62688 421.72 514 489 147.5

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