ASTROSAT CZTI

Data Quality Report

Orbit 51675

Creation date: 2025-04-22T12:01:05.975036
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_031T01_9000006462_51675cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51675cztM0_level2_quad_clean.evt
Size (bytes)739,270,080116,616,960
Size705.0 MB 111.2 MB
Events in quadrant A10,411,870626,835
Events in quadrant B5,068,937858,218
Events in quadrant C6,270,661739,658
Events in quadrant D4,949,390710,977

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0370047
B0210160
C0246480
D0208191

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8575211824.699708%
B85761892.203825%
C85775145.992771%
D85762212.576959%

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 8576 8575 1866 1866 21.76% 21.76%
B 8576 8576 136 136 1.59% 1.59%
C 8577 8577 469 469 5.47% 5.47%
D 8576 8576 203 203 2.37% 2.37%

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 5362772 26755.83 818 799 200.4
A 12 250 641619 3197.64 818 799 200.4
A 12 3 513266 2557.17 818 799 200.4
B 5 172 593897 3034.9 911 878 195.4
B 1 207 131343 667.68 911 878 195.4
B 6 51 80653 408.27 911 878 195.4
C 15 231 701981 2887.9 886 877 242.8
C 13 3 593082 2439.33 886 877 242.8
C 15 189 548081 2253.97 886 877 242.8
D 7 126 491505 2008.74 884 853 244.3
D 7 159 174842 712.32 884 853 244.3
D 2 249 121272 493.0 884 853 244.3

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