ASTROSAT CZTI

Data Quality Report

Orbit 55842

Creation date: 2026-01-23T14:28:24.059273
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_55842cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55842cztM0_level2_quad_clean.evt
Size (bytes)586,872,000110,831,040
Size559.7 MB 105.7 MB
Events in quadrant A6,460,003699,042
Events in quadrant B3,745,752780,161
Events in quadrant C3,583,747717,173
Events in quadrant D7,320,739609,679

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250251
B0167951
C0169551
D0273231

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79115627.104032%
B79112713.425610%
C7912801.011122%
D791294411.931244%

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 8616 7911 265 265 3.08% 3.35%
B 8616 7911 4 4 0.05% 0.05%
C 8617 7912 13 13 0.15% 0.16%
D 8617 7912 880 880 10.21% 11.12%

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 1481643 7063.19 850 828 209.7
A 0 8 588273 2801.99 850 828 209.7
A 12 115 446271 2124.67 850 828 209.7
B 0 197 221523 1198.24 851 818 184.2
B 0 213 65442 350.85 851 818 184.2
B 5 185 30677 162.11 851 818 184.2
C 6 223 80632 342.75 845 838 232.8
C 14 254 51097 215.88 845 838 232.8
C 12 250 46463 195.98 845 838 232.8
D 11 129 2951847 12929.05 805 769 228.3
D 3 12 616239 2696.45 805 769 228.3
D 8 245 243901 1065.19 805 769 228.3

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