ASTROSAT CZTI

Data Quality Report

Orbit 20210822_T04_044T01_9000004652_level2

Creation date: 2021-08-23T10:09:25.697733
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_044T01_9000004652cztM0_level2_bc.evt modeM0/AS1T04_044T01_9000004652cztM0_level2_quad_clean.evt
Size (bytes)819,469,440181,866,240
Size781.5 MB 173.4 MB
Events in quadrant A3,151,1061,189,777
Events in quadrant B8,626,2451,142,234
Events in quadrant C6,719,5701,075,724
Events in quadrant D5,347,2311,116,053

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02960
B02940
C02960
D02960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0296230
B0487230
C0456470
D0368350

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14275880.616462%
B141389536.740699%
C1422913009.136271%
D142501531.073684%

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 17298 14359 0 0 0.00% 0.00%
B 17298 14230 96 96 0.55% 0.67%
C 17299 14333 7 7 0.04% 0.05%
D 17298 14346 12 12 0.07% 0.08%

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 13 254 19520 107.47 809 797 174.2
A 13 6 17699 97.02 809 797 174.2
A 12 96 12600 67.75 809 797 174.2
B 6 159 3557752 23208.58 794 776 153.3
B 10 245 1949056 12712.15 794 776 153.3
B 0 229 37975 242.72 794 776 153.3
C 3 233 2784444 16105.81 735 733 172.8
C 0 10 1022029 5908.95 735 733 172.8
C 15 159 30966 174.92 735 733 172.8
D 8 195 1627930 9224.65 782 760 176.4
D 2 250 204086 1152.68 782 760 176.4
D 1 52 136175 767.69 782 760 176.4

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