ASTROSAT CZTI

Data Quality Report

Orbit 20210305_T03_280T01_9000004222_level2

Creation date: 2021-03-08T18:32:48.819980
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/AS1T03_280T01_9000004222cztM0_level2_bc.evt modeM0/AS1T03_280T01_9000004222cztM0_level2_quad_clean.evt
Size (bytes)1,352,891,520327,836,160
Size1.3 GB 312.6 MB
Events in quadrant A5,551,5932,186,659
Events in quadrant B6,626,6112,218,673
Events in quadrant C7,195,2672,136,523
Events in quadrant D19,994,7071,767,855

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490
B0490
C0490
D0490

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0496900
B0539340
C0578930
D01084300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04800
B04800
C04800
D04800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A235151100.467787%
B235154301.828620%
C235155812.470763%
D23515592325.188178%

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 28455 23515 2 2 0.01% 0.01%
B 28455 23515 49 49 0.17% 0.21%
C 28455 23515 1 1 0.00% 0.00%
D 28455 23514 633 633 2.22% 2.69%

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 60512 195.16 1420 1401 302.9
A 13 254 45554 145.77 1420 1401 302.9
A 1 113 9432 26.51 1420 1401 302.9
B 10 245 556562 2094.38 1424 1400 265.1
B 0 229 238953 896.18 1424 1400 265.1
B 5 255 168441 630.17 1424 1400 265.1
C 3 233 1662067 5029.82 1385 1388 330.2
C 4 175 52845 155.85 1385 1388 330.2
C 2 114 47179 138.69 1385 1388 330.2
D 12 33 8197536 28551.9 1256 1223 287.1
D 1 52 4746976 16531.85 1256 1223 287.1
D 8 195 823153 2863.2 1256 1223 287.1

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