ASTROSAT CZTI

Data Quality Report

Orbit 20210822_A10_123T09_9000004654_level2

Creation date: 2021-08-25T16:55:58.439416
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/AS1A10_123T09_9000004654cztM0_level2_bc.evt modeM0/AS1A10_123T09_9000004654cztM0_level2_quad_clean.evt
Size (bytes)7,967,278,0801,521,728,640
Size7.4 GB 1.4 GB
Events in quadrant A24,914,14010,787,610
Events in quadrant B69,393,3199,935,328
Events in quadrant C46,479,3789,674,836
Events in quadrant D93,015,1368,112,106

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02330040
B04015050
C03299180
D05179110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A022570
B022560
C022680
D022560

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01790
B01800
C01770
D01810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11061111481.037871%
B1102661215911.026971%
C11033392958.424497%
D1102333162428.688324%

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 155446 111109 9 9 0.01% 0.01%
B 155447 110747 473 473 0.30% 0.43%
C 155447 110832 133 133 0.09% 0.12%
D 155446 110707 1782 1782 1.15% 1.61%

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 15 174 275975 200.82 6285 6204 1343.3
A 13 254 209501 151.34 6285 6204 1343.3
A 13 6 182961 131.58 6285 6204 1343.3
B 6 159 28961429 26031.27 5899 5776 1112.3
B 4 80 7509981 6746.32 5899 5776 1112.3
B 5 172 4525420 4063.18 5899 5776 1112.3
C 3 233 16090608 11897.47 5716 5707 1352.0
C 0 10 7321640 5411.35 5716 5707 1352.0
C 14 254 240263 173.49 5716 5707 1352.0
D 12 33 41730210 34262.6 5285 5135 1217.8
D 8 195 19307002 15849.75 5285 5135 1217.8
D 12 218 3075592 2521.31 5285 5135 1217.8

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