ASTROSAT CZTI

Data Quality Report

Orbit 20210406_A10_083T01_9000004280_level2

Creation date: 2021-04-16T08:46:06.857316
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A10_083T01_9000004280cztM0_level2_bc.evt modeM0/AS1A10_083T01_9000004280cztM0_level2_quad_clean.evt
Size (bytes)724,541,760219,179,520
Size691.0 MB 209.0 MB
Events in quadrant A3,205,6251,437,867
Events in quadrant B7,657,5751,437,495
Events in quadrant C5,380,2811,356,427
Events in quadrant D4,638,6051,337,188

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0319560
B0470240
C0397780
D0382540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03160
B03160
C03160
D03160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A155051460.941632%
B155054262.747501%
C155055003.224766%
D155057444.798452%

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 20266 15508 0 0 0.00% 0.00%
B 20266 15508 0 0 0.00% 0.00%
C 20266 15506 0 0 0.00% 0.00%
D 20266 15498 48 48 0.24% 0.31%

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 8 192 40875 224.02 817 803 178.9
A 13 254 28206 153.19 817 803 178.9
A 0 226 5165 24.39 817 803 178.9
B 6 159 4424115 27678.41 816 799 159.8
B 0 190 55815 344.26 816 799 159.8
B 0 230 13062 76.73 816 799 159.8
C 3 233 2257944 12165.3 772 767 185.5
C 10 22 124118 664.81 772 767 185.5
C 2 114 30054 157.85 772 767 185.5
D 8 195 491177 2765.16 768 743 177.4
D 13 104 309194 1739.1 768 743 177.4
D 13 153 294103 1654.02 768 743 177.4

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