ASTROSAT CZTI

Data Quality Report

Orbit 20201120_A10_002T04_9000004022_level2

Creation date: 2021-01-07T09:40:37.299507
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_002T04_9000004022cztM0_level2_bc.evt modeM0/AS1A10_002T04_9000004022cztM0_level2_quad_clean.evt
Size (bytes)3,971,715,8401,441,546,560
Size3.7 GB 1.3 GB
Events in quadrant A22,266,7139,649,066
Events in quadrant B24,771,5309,401,136
Events in quadrant C23,253,8859,061,141
Events in quadrant D43,245,8938,761,949

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020200
B020200
C020200
D020200

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01810
B01810
C01810
D01810

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02093160
B02212190
C02172940
D02880980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9909111291.139357%
B9909122422.262567%
C9909119791.997154%
D9909165496.609077%

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 117241 99077 19 19 0.02% 0.02%
B 117241 99073 27 27 0.02% 0.03%
C 117241 99073 0 0 0.00% 0.00%
D 117241 99075 1312 1312 1.12% 1.32%

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 6 16 227200 180.42 5680 5594 1228.3
A 13 254 171957 135.44 5680 5594 1228.3
A 13 248 76147 57.44 5680 5594 1228.3
B 10 245 2009549 1931.26 5558 5432 1037.7
B 0 190 553405 528.05 5558 5432 1037.7
B 15 32 261554 246.81 5558 5432 1037.7
C 3 233 2611624 2044.39 5350 5318 1274.9
C 13 61 30479 19.74 5350 5318 1274.9
C 1 16 24239 14.84 5350 5318 1274.9
D 1 52 18711725 15076.31 5394 5243 1240.8
D 2 250 1694962 1361.81 5394 5243 1240.8
D 13 104 1311368 1052.66 5394 5243 1240.8

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