ASTROSAT CZTI

Data Quality Report

Orbit 55794

Creation date: 2026-01-20T08:09:18.271998
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_55794cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55794cztM0_level2_quad_clean.evt
Size (bytes)614,370,240116,856,000
Size585.9 MB 111.4 MB
Events in quadrant A8,752,428605,513
Events in quadrant B3,942,829886,571
Events in quadrant C3,604,724836,386
Events in quadrant D5,934,468754,138

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0304872
B0171372
C0163282
D0223962

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6542191729.302965%
B65424827.367777%
C65433345.104692%
D65436339.674461%

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 7712 6541 1623 1623 21.05% 24.81%
B 7712 6542 400 400 5.19% 6.11%
C 7713 6544 331 331 4.29% 5.06%
D 7713 6543 712 712 9.23% 10.88%

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 15 32 4898040 16842.04 789 762 290.8
A 8 192 267264 916.52 789 762 290.8
A 12 115 263899 904.94 789 762 290.8
B 5 172 191927 725.78 891 878 263.2
B 10 247 95207 358.35 891 878 263.2
B 7 252 76954 289.01 891 878 263.2
C 13 3 96373 291.37 856 833 327.9
C 15 200 92408 279.28 856 833 327.9
C 6 223 36085 107.51 856 833 327.9
D 11 129 1821872 5289.14 872 811 344.3
D 3 12 260695 754.81 872 811 344.3
D 8 245 173108 500.42 872 811 344.3

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