ASTROSAT CZTI

Data Quality Report

Orbit 35235

Creation date: 2022-04-04T20:43:35.921670
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/AS1C07_004T01_9000005052_35235cztM0_level2.evt modeM0/AS1C07_004T01_9000005052_35235cztM0_level2_quad_clean.evt
Size (bytes)740,404,80079,859,520
Size706.1 MB 76.2 MB
Events in quadrant A2,586,708577,511
Events in quadrant B8,783,297411,084
Events in quadrant C3,767,916555,007
Events in quadrant D6,931,002504,948

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0109573
B0297642
C0145502
D0243082

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5257110.209245%
B5257260849.610044%
C52572464.679475%
D525761611.717710%

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 7320 5258 4 4 0.05% 0.08%
B 7320 5258 1986 1986 27.13% 37.77%
C 7320 5258 215 215 2.94% 4.09%
D 7320 5258 851 851 11.63% 16.18%

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 10 83 87863 688.03 634 624 126.8
A 9 143 21077 161.31 634 624 126.8
A 13 6 14852 112.21 634 624 126.8
B 5 236 4860494 52084.9 490 480 93.3
B 5 172 1907657 20439.27 490 480 93.3
B 5 200 28784 303.33 490 480 93.3
C 10 49 808389 5914.22 594 599 136.6
C 0 10 412814 3018.02 594 599 136.6
C 15 214 219692 1604.08 594 599 136.6
D 8 195 3526206 24260.88 590 574 145.3
D 13 249 251748 1728.4 590 574 145.3
D 7 80 217542 1493.02 590 574 145.3

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