ASTROSAT CZTI

Data Quality Report

Orbit 51731

Creation date: 2025-04-21T21:18:42.546485
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/AS1A13_090T01_9000006464_51731cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51731cztM0_level2_quad_clean.evt
Size (bytes)855,400,320101,217,600
Size815.8 MB 96.5 MB
Events in quadrant A6,997,180694,045
Events in quadrant B5,195,868774,256
Events in quadrant C4,974,535704,510
Events in quadrant D13,887,897344,944

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0263210
B0206890
C0202320
D0466780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A78597219.174195%
B78594015.102430%
C78602783.536896%
D7860421553.625954%

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 7859 7859 459 459 5.84% 5.84%
B 7859 7859 137 137 1.74% 1.74%
C 7860 7860 195 195 2.48% 2.48%
D 7860 7860 3797 3797 48.31% 48.31%

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 12 3 1008947 4794.93 867 847 210.2
A 0 111 908962 4319.36 867 847 210.2
A 4 175 443446 2105.18 867 847 210.2
B 4 174 267835 1411.0 873 843 189.2
B 1 239 216556 1140.0 873 843 189.2
B 0 216 149718 786.77 873 843 189.2
C 13 3 318189 1357.38 855 849 233.8
C 3 233 290356 1238.32 855 849 233.8
C 15 231 199342 849.02 855 849 233.8
D 11 129 10813844 63169.18 615 593 171.2
D 8 176 134446 781.95 615 593 171.2
D 2 120 123405 717.45 615 593 171.2

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