ASTROSAT CZTI

Data Quality Report

Orbit 20210427_A10_021T06_9000004338_level2

Creation date: 2021-04-28T16:16:47.804067
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_021T06_9000004338cztM0_level2_bc.evt modeM0/AS1A10_021T06_9000004338cztM0_level2_quad_clean.evt
Size (bytes)892,912,320201,579,840
Size851.5 MB 192.2 MB
Events in quadrant A3,894,1001,289,718
Events in quadrant B7,408,2201,283,004
Events in quadrant C9,969,1391,200,080
Events in quadrant D4,685,2521,236,208

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03200
B03200
C03200
D03200

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0354700
B0480330
C0552420
D0370760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A158965783.636135%
B158966353.994716%
C15896159010.002516%
D158965043.170609%

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 16271 15896 22 22 0.14% 0.14%
B 16271 15897 0 0 0.00% 0.00%
C 16271 15896 89 89 0.55% 0.56%
D 16271 15897 52 52 0.32% 0.33%

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 771956 4312.54 806 788 178.8
A 13 254 25302 137.09 806 788 178.8
A 8 192 8347 42.27 806 788 178.8
B 6 159 4207143 26283.37 810 788 160.0
B 6 36 48113 295.71 810 788 160.0
B 0 190 23614 142.62 810 788 160.0
C 3 233 6907769 37707.43 763 756 183.2
C 15 208 90875 491.99 763 756 183.2
C 2 114 29278 155.71 763 756 183.2
D 1 52 892253 4716.62 794 771 189.0
D 8 195 408061 2154.88 794 771 189.0
D 2 250 87083 456.66 794 771 189.0

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