ASTROSAT CZTI

Data Quality Report

Orbit 20200824_A09_095T02_9000003840_level2

Creation date: 2021-01-09T02:17:13.127610
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/AS1A09_095T02_9000003840cztM0_level2_bc.evt modeM0/AS1A09_095T02_9000003840cztM0_level2_quad_clean.evt
Size (bytes)5,709,559,6801,891,437,120
Size5.3 GB 1.8 GB
Events in quadrant A29,422,97312,786,707
Events in quadrant B31,213,40612,926,850
Events in quadrant C34,666,69812,260,448
Events in quadrant D69,855,73611,496,499

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01850
B01850
C01850
D01850

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023200
B023200
C023200
D023200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02511310
B02587470
C02782310
D04052000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11411916741.466890%
B11411924862.178428%
C11411950514.426082%
D1141191477812.949640%

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 132244 114113 180 180 0.14% 0.16%
B 132244 114108 234 234 0.18% 0.21%
C 132244 114109 519 519 0.39% 0.45%
D 132244 114108 3263 3263 2.47% 2.86%

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 0 13 3529555 2588.25 6328 6239 1361.3
A 5 168 994029 725.64 6328 6239 1361.3
A 9 130 470686 341.18 6328 6239 1361.3
B 3 64 4156901 3493.11 6354 6222 1188.2
B 3 112 1141674 955.57 6354 6222 1188.2
B 5 172 1023954 856.5 6354 6222 1188.2
C 4 254 6831951 4803.97 6013 6021 1420.9
C 3 233 3098031 2176.1 6013 6021 1420.9
C 15 127 1567246 1098.76 6013 6021 1420.9
D 1 52 23496196 17376.33 5859 5726 1351.9
D 7 80 18887836 13967.44 5859 5726 1351.9
D 2 250 2124274 1567.13 5859 5726 1351.9

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