ASTROSAT CZTI

Data Quality Report

Orbit 20161118_A02_152T01_9000000806_level2

Creation date: 2021-08-25T18:23:18.707944
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/AS1A02_152T01_9000000806cztM0_level2_bc.evt modeM0/AS1A02_152T01_9000000806cztM0_level2_quad_clean.evt
Size (bytes)878,523,840367,548,480
Size837.8 MB 350.5 MB
Events in quadrant A6,067,0692,337,298
Events in quadrant B6,526,7942,391,137
Events in quadrant C5,690,7832,258,298
Events in quadrant D6,380,2512,197,013

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05860
B05840
C05860
D05860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0602660
B0622360
C0591580
D0611450

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0640
B0650
C0640
D0640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A283293521.242543%
B283544841.706990%
C282502110.746903%
D282762500.884142%

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 39721 30005 5 5 0.01% 0.02%
B 39721 30061 12 12 0.03% 0.04%
C 39721 29939 5 5 0.01% 0.02%
D 39721 30026 41 41 0.10% 0.14%

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 8 15 292218 920.6 1444 1414 315.9
A 15 234 110559 345.52 1444 1414 315.9
A 13 251 42509 130.09 1444 1414 315.9
B 3 64 620124 2217.57 1471 1431 279.0
B 4 80 95082 335.67 1471 1431 279.0
B 15 204 61677 215.94 1471 1431 279.0
C 12 16 147783 475.43 1399 1375 307.9
C 1 16 42168 132.47 1399 1375 307.9
C 9 16 11481 32.82 1399 1375 307.9
D 2 136 503249 1550.33 1407 1353 323.7
D 8 195 124178 379.4 1407 1353 323.7
D 10 172 122113 373.02 1407 1353 323.7

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