ASTROSAT CZTI

Data Quality Report

Orbit 55931

Creation date: 2026-02-05T11:43:40.543851
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_030T02_9000006544_55931cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55931cztM0_level2_quad_clean.evt
Size (bytes)520,983,360109,690,560
Size496.8 MB 104.6 MB
Events in quadrant A3,738,566707,806
Events in quadrant B3,381,952779,264
Events in quadrant C4,674,552677,687
Events in quadrant D6,873,488605,062

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0173470
B0163200
C0198920
D0258960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79331551.953864%
B7933300.378167%
C79333234.071600%
D79337589.555023%

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 7933 7933 147 147 1.85% 1.85%
B 7932 7932 7 7 0.09% 0.09%
C 7932 7932 259 259 3.27% 3.27%
D 7933 7933 791 791 9.97% 9.97%

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 4 249 482199 2404.74 808 786 200.2
A 7 64 37470 183.24 808 786 200.2
A 3 78 24410 118.01 808 786 200.2
B 2 249 81278 461.47 811 780 174.4
B 7 252 27317 152.13 811 780 174.4
B 0 199 22820 126.35 811 780 174.4
C 12 252 1122493 5226.92 787 781 214.6
C 15 199 296807 1379.41 787 781 214.6
C 6 223 103280 477.62 787 781 214.6
D 11 129 2577198 11915.22 761 727 216.2
D 7 129 511049 2360.05 761 727 216.2
D 2 62 433403 2000.97 761 727 216.2

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