ASTROSAT CZTI

Data Quality Report

Orbit 55812

Creation date: 2026-01-21T21:48:43.886269
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_127T10_9000006542_55812cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55812cztM0_level2_quad_clean.evt
Size (bytes)564,096,960109,270,080
Size538.0 MB 104.2 MB
Events in quadrant A5,373,130713,424
Events in quadrant B3,951,634758,496
Events in quadrant C4,893,290663,998
Events in quadrant D6,070,925642,038

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0212512
B0176682
C0205802
D0234412

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A76235697.464253%
B76244395.758132%
C76246037.909234%
D76245957.804302%

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 9008 7625 250 250 2.78% 3.28%
B 9009 7626 93 93 1.03% 1.22%
C 9009 7626 357 357 3.96% 4.68%
D 9009 7626 335 335 3.72% 4.39%

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 0 8 624879 3000.02 830 809 208.0
A 15 32 481322 2309.91 830 809 208.0
A 12 115 392698 1883.88 830 809 208.0
B 5 185 355420 1967.84 817 786 180.2
B 0 213 170515 941.82 817 786 180.2
B 10 247 122537 675.59 817 786 180.2
C 13 3 1138490 5197.65 795 789 218.9
C 12 252 351711 1603.21 795 789 218.9
C 15 200 133540 606.48 795 789 218.9
D 11 129 1509091 6688.03 790 754 225.5
D 8 160 514128 2276.32 790 754 225.5
D 8 245 457474 2025.12 790 754 225.5

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