ASTROSAT CZTI

Data Quality Report

Orbit 20201123_A10_024T01_9000004026_level2

Creation date: 2021-01-07T08:08:21.516364
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_024T01_9000004026cztM0_level2_bc.evt modeM0/AS1A10_024T01_9000004026cztM0_level2_quad_clean.evt
Size (bytes)923,109,120329,397,120
Size880.3 MB 314.1 MB
Events in quadrant A5,518,9732,214,104
Events in quadrant B6,482,9082,176,386
Events in quadrant C5,406,9252,058,829
Events in quadrant D9,021,6761,991,513

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490120
B0536990
C0493230
D0612560

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0590
B0590
C0590
D0590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04560
B04560
C04560
D04560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A223233321.487255%
B223237293.265690%
C223234552.038257%
D2232314036.284998%

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 28218 22322 5 5 0.02% 0.02%
B 28218 22321 6 6 0.02% 0.03%
C 28218 22320 1 1 0.00% 0.00%
D 28218 22320 406 406 1.44% 1.82%

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 195891 677.52 1329 1311 287.2
A 15 174 80045 274.15 1329 1311 287.2
A 0 13 70677 241.53 1329 1311 287.2
B 5 172 475110 1921.45 1313 1287 246.6
B 10 245 303353 1224.94 1313 1287 246.6
B 0 190 190334 766.62 1313 1287 246.6
C 3 233 612837 2136.16 1226 1225 286.3
C 15 208 52176 177.96 1226 1225 286.3
C 0 207 13192 41.8 1226 1225 286.3
D 1 52 3167871 11197.02 1240 1205 282.8
D 2 250 434407 1531.76 1240 1205 282.8
D 7 69 162848 571.55 1240 1205 282.8

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