ASTROSAT CZTI

Data Quality Report

Orbit 20210416_A10_071T03_9000004314_level2

Creation date: 2021-04-19T13:26:26.456418
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/AS1A10_071T03_9000004314cztM0_level2_bc.evt modeM0/AS1A10_071T03_9000004314cztM0_level2_quad_clean.evt
Size (bytes)2,284,404,480711,576,000
Size2.1 GB 678.6 MB
Events in quadrant A12,325,5754,610,136
Events in quadrant B26,367,1754,572,041
Events in quadrant C11,587,0534,348,147
Events in quadrant D15,235,4614,325,859

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C0960
D0960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01141970
B01639090
C01138980
D01221070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011020
B011020
C011020
D011020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A538817971.479186%
B5388113252.459123%
C5388110882.019265%
D538819101.688907%

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 63661 53884 1 1 0.00% 0.00%
B 63661 53883 5 5 0.01% 0.01%
C 63661 53882 1 1 0.00% 0.00%
D 63661 53881 85 85 0.13% 0.16%

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 5 203 157853 234.47 3107 3061 660.2
A 8 192 113839 167.8 3107 3061 660.2
A 13 254 93388 136.82 3107 3061 660.2
B 6 159 14266783 24377.07 3094 3030 585.1
B 10 247 96849 160.34 3094 3030 585.1
B 6 36 73637 120.67 3094 3030 585.1
C 3 233 180640 260.46 2923 2921 682.3
C 2 114 101197 144.03 2923 2921 682.3
C 0 10 34006 45.56 2923 2921 682.3
D 7 80 1711523 2520.77 2975 2902 677.8
D 8 195 1291846 1901.61 2975 2902 677.8
D 7 223 314090 459.1 2975 2902 677.8

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