ASTROSAT CZTI

Data Quality Report

Orbit 20200826_T03_220T01_9000003842_level2

Creation date: 2021-01-09T01:36:55.667263
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_220T01_9000003842cztM0_level2_bc.evt modeM0/AS1T03_220T01_9000003842cztM0_level2_quad_clean.evt
Size (bytes)2,946,957,120803,635,200
Size2.7 GB 766.4 MB
Events in quadrant A12,814,2335,387,311
Events in quadrant B15,945,3055,420,110
Events in quadrant C18,837,2725,152,926
Events in quadrant D38,009,9064,706,830

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010920
B010920
C010920
D010920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01142840
B01266110
C01457660
D02172980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01050
B01050
C01050
D01050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A534966351.187005%
B5349615312.861896%
C5349645288.464184%
D534961124121.012786%

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 64056 53487 21 21 0.03% 0.04%
B 64056 53486 127 127 0.20% 0.24%
C 64056 53487 84 84 0.13% 0.16%
D 64056 53488 2462 2462 3.84% 4.60%

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 5 168 426480 638.02 3077 3033 663.7
A 0 13 342845 512.01 3077 3033 663.7
A 9 130 141994 209.38 3077 3033 663.7
B 5 172 1652860 2885.49 3072 3015 571.8
B 3 64 1209468 2110.02 3072 3015 571.8
B 0 189 605594 1053.88 3072 3015 571.8
C 4 254 5970696 8842.95 2872 2869 674.9
C 3 233 1724523 2551.09 2872 2869 674.9
C 2 16 51913 72.67 2872 2869 674.9
D 7 80 18287740 27720.57 2729 2667 659.6
D 1 52 5835647 8842.92 2729 2667 659.6
D 12 233 1544662 2337.7 2729 2667 659.6

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