ASTROSAT CZTI

Data Quality Report

Orbit 20210531_A10_094T81_9000004426_level2

Creation date: 2021-06-03T10:08:56.468067
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_094T81_9000004426cztM0_level2_bc.evt modeM0/AS1A10_094T81_9000004426cztM0_level2_quad_clean.evt
Size (bytes)3,639,398,400889,591,680
Size3.4 GB 848.4 MB
Events in quadrant A11,558,2226,295,783
Events in quadrant B23,093,1056,244,383
Events in quadrant C11,668,8096,072,212
Events in quadrant D60,736,6395,124,387

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0570
B0570
C0570
D0570

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020260
B01417920
C01037290
D02597500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09480
B09480
C09480
D09480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A466898491.818415%
B466898471.814132%
C466899932.126839%
D466891566933.560368%

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 52289 46691 37 37 0.07% 0.08%
B 52289 46691 1 1 0.00% 0.00%
C 52289 46691 4 4 0.01% 0.01%
D 52289 46690 6228 6228 11.91% 13.34%

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 1699335 3144.33 2527 2494 539.7
A 13 254 81894 147.13 2527 2494 539.7
A 8 192 80778 145.06 2527 2494 539.7
B 6 159 12844034 27013.35 2517 2465 475.4
B 0 190 222322 462.49 2517 2465 475.4
B 0 230 90100 184.35 2517 2465 475.4
C 3 233 1219767 2123.47 2427 2422 573.3
C 10 22 661085 1148.94 2427 2422 573.3
C 2 16 127391 217.99 2427 2422 573.3
D 8 195 37254028 71654.41 2229 2164 519.9
D 12 227 5212080 10021.34 2229 2164 519.9
D 12 218 3721321 7153.84 2229 2164 519.9

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