ASTROSAT CZTI

Data Quality Report

Orbit 20200913_A09_145T01_9000003866_level2

Creation date: 2021-01-08T09:13:23.775732
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_145T01_9000003866cztM0_level2_bc.evt modeM0/AS1A09_145T01_9000003866cztM0_level2_quad_clean.evt
Size (bytes)6,645,473,2801,729,572,480
Size6.2 GB 1.6 GB
Events in quadrant A43,296,86611,441,639
Events in quadrant B44,234,93111,381,220
Events in quadrant C26,645,09111,139,536
Events in quadrant D78,926,77510,196,520

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01870
B01870
C01870
D01870

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03108350
B03187290
C02542920
D04567820

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024480
B024480
C024480
D024480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12003527082.256009%
B12003586337.192069%
C12003623321.942751%
D1200362034716.950748%

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 144310 120041 61 61 0.04% 0.05%
B 144310 120030 1439 1439 1.00% 1.20%
C 144310 120032 23 23 0.02% 0.02%
D 144310 120035 3870 3870 2.68% 3.22%

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 16042087 10421.68 6965 6854 1538.6
A 13 254 183448 114.77 6965 6854 1538.6
A 8 255 165824 103.32 6965 6854 1538.6
B 0 189 9951202 7555.7 6841 6732 1316.2
B 3 64 5580298 4234.73 6841 6732 1316.2
B 10 246 1051456 793.77 6841 6732 1316.2
C 15 208 494109 307.13 6707 6737 1586.8
C 14 176 206565 125.93 6707 6737 1586.8
C 3 233 82472 47.73 6707 6737 1586.8
D 1 52 31464836 20960.08 6310 6155 1500.9
D 7 80 18317597 12200.42 6310 6155 1500.9
D 2 250 2147756 1426.89 6310 6155 1500.9

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