ASTROSAT CZTI

Data Quality Report

Orbit 20201227_A10_045T05_9000004086_level2

Creation date: 2021-01-06T15:23:57.878783
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_045T05_9000004086cztM0_level2_bc.evt modeM0/AS1A10_045T05_9000004086cztM0_level2_quad_clean.evt
Size (bytes)3,382,951,6801,022,808,960
Size3.2 GB 975.4 MB
Events in quadrant A16,391,1856,515,869
Events in quadrant B19,298,3206,697,888
Events in quadrant C15,955,4536,467,463
Events in quadrant D45,651,7106,102,719

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015420
B015420
C015420
D015420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01601180
B01694730
C01615700
D02597700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A757918971.183518%
B7579113611.795728%
C7579114631.930308%
D7579167218.867808%

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 87511 75784 10 10 0.01% 0.01%
B 87511 75782 13 13 0.01% 0.02%
C 87511 75787 1 1 0.00% 0.00%
D 87511 75788 1626 1626 1.86% 2.15%

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 190491 210.45 4156 4087 885.7
A 13 254 110725 120.39 4156 4087 885.7
A 13 6 62034 65.42 4156 4087 885.7
B 10 245 2609893 3325.95 4219 4119 783.5
B 0 230 286690 360.67 4219 4119 783.5
B 10 246 116768 143.78 4219 4119 783.5
C 3 233 134613 136.69 4073 4061 955.1
C 7 220 117919 119.21 4073 4061 955.1
C 4 224 44702 42.55 4073 4061 955.1
D 1 52 18737015 20673.42 3985 3861 906.1
D 8 195 10185008 11235.65 3985 3861 906.1
D 2 250 672118 737.47 3985 3861 906.1

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