ASTROSAT CZTI

Data Quality Report

Orbit 20211217_T04_076T01_9000004810_level2

Creation date: 2021-12-27T22:03:38.255018
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/AS1T04_076T01_9000004810cztM0_level2_bc.evt modeM0/AS1T04_076T01_9000004810cztM0_level2_quad_clean.evt
Size (bytes)12,510,305,2802,770,099,200
Size11.7 GB 2.6 GB
Events in quadrant A78,570,92514,658,815
Events in quadrant B89,476,05017,948,915
Events in quadrant C84,284,01618,348,096
Events in quadrant D110,968,22917,246,286

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A046680
B046680
C046680
D046680

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08510
B08510
C08510
D08510

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08178090
B06459450
C05890570
D06896240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2290176087126.579250%
B229017177857.765799%
C22901738491.680661%
D22901775213.284036%

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 313491 222075 804 804 0.26% 0.36%
B 313492 229013 799 799 0.25% 0.35%
C 313492 229016 239 239 0.08% 0.10%
D 313492 229016 988 988 0.32% 0.43%

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 15 169 33180563 15630.48 9719 9579 2122.2
A 15 237 6640742 3124.67 9719 9579 2122.2
A 13 6 370271 169.96 9719 9579 2122.2
B 5 172 31967454 13667.38 12018 11766 2338.1
B 4 170 1535723 651.79 12018 11766 2338.1
B 15 222 1403254 595.14 12018 11766 2338.1
C 3 233 18751920 6907.74 12094 12046 2712.9
C 15 214 9894563 3642.81 12094 12046 2712.9
C 0 10 5341667 1964.56 12094 12046 2712.9
D 8 195 30719605 9722.24 11935 11668 3158.5
D 2 250 6202507 1960.04 11935 11668 3158.5
D 13 249 5315175 1679.11 11935 11668 3158.5

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