ASTROSAT CZTI

Data Quality Report

Orbit 20180823_T02_088T01_9000002320_level2

Creation date: 2018-08-24T09:58:24.916530
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/AS1T02_088T01_9000002320cztM0_level2_bc.evt modeM0/AS1T02_088T01_9000002320cztM0_level2_quad_clean.evt
Size (bytes)2,547,552,960892,601,280
Size2.4 GB 851.3 MB
Events in quadrant A15,325,7065,599,030
Events in quadrant B16,842,4895,689,740
Events in quadrant C15,372,7835,473,475
Events in quadrant D24,617,3245,249,592

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01517320
B01566040
C01536960
D01816010

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014960
B014960
C014960
D014960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A732588761.195774%
B7325810771.470147%
C7325812771.743154%
D7325825023.415327%

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 84445 73264 17 17 0.02% 0.02%
B 84444 73263 9 9 0.01% 0.01%
C 84444 73264 5 5 0.01% 0.01%
D 84445 73262 607 607 0.72% 0.83%

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 13 248 254783 300.54 3855 3784 835.2
A 13 210 123305 143.11 3855 3784 835.2
A 4 2 86259 98.75 3855 3784 835.2
B 5 236 443721 607.06 3909 3815 724.7
B 4 173 235923 320.3 3909 3815 724.7
B 4 216 226965 307.94 3909 3815 724.7
C 3 233 400419 459.0 3733 3719 864.3
C 7 221 227952 259.45 3733 3719 864.3
C 9 54 171457 194.08 3733 3719 864.3
D 1 52 7995348 9287.46 3742 3613 860.5
D 10 70 612092 707.13 3742 3613 860.5
D 12 110 589865 681.3 3742 3613 860.5

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