ASTROSAT CZTI

Data Quality Report

Orbit 20200817_A09_108T02_9000003822_level2

Creation date: 2021-01-09T04:49:36.991301
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_108T02_9000003822cztM0_level2_bc.evt modeM0/AS1A09_108T02_9000003822cztM0_level2_quad_clean.evt
Size (bytes)2,345,852,160845,544,960
Size2.2 GB 806.4 MB
Events in quadrant A13,373,7605,420,086
Events in quadrant B13,227,1545,574,123
Events in quadrant C15,085,5315,367,136
Events in quadrant D25,277,3965,142,548

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0940
B0940
C0940
D0940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01269650
B01264870
C01354000
D01679590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012200
B012200
C012200
D012200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A598786181.032099%
B598787341.225826%
C5987814892.486723%
D5987840316.732022%

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 69268 59878 26 26 0.04% 0.04%
B 69268 59875 0 0 0.00% 0.00%
C 69268 59876 73 73 0.11% 0.12%
D 69268 59876 1207 1207 1.74% 2.02%

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 559723 787.54 3280 3225 706.6
A 6 16 119369 164.36 3280 3225 706.6
A 13 254 86036 117.19 3280 3225 706.6
B 0 244 129292 203.07 3343 3272 620.6
B 0 229 64510 98.68 3343 3272 620.6
B 5 172 57894 88.02 3343 3272 620.6
C 4 254 1093469 1446.75 3212 3205 753.6
C 3 233 752278 994.0 3212 3205 753.6
C 2 16 574746 758.42 3212 3205 753.6
D 1 52 6737941 9277.85 3168 3088 725.9
D 11 176 3296198 4536.55 3168 3088 725.9
D 7 80 1572479 2161.97 3168 3088 725.9

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