ASTROSAT CZTI

Data Quality Report

Orbit 20210701_T04_018T01_9000004494_level2

Creation date: 2021-07-02T11:35:32.391119
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_018T01_9000004494cztM0_level2_bc.evt modeM0/AS1T04_018T01_9000004494cztM0_level2_quad_clean.evt
Size (bytes)1,561,573,440486,869,760
Size1.5 GB 464.3 MB
Events in quadrant A7,209,6803,171,407
Events in quadrant B17,140,7823,121,515
Events in quadrant C7,715,9163,062,318
Events in quadrant D12,858,7413,003,871

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0716370
B01066140
C0740700
D0894540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0470
B0470
C0470
D0470

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07020
B07020
C07020
D07020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A347832920.839491%
B347836621.903229%
C347837822.248225%
D347835641.621482%

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 39218 34784 0 0 0.00% 0.00%
B 39218 34784 12 12 0.03% 0.03%
C 39218 34783 14 14 0.04% 0.04%
D 39218 34783 37 37 0.09% 0.11%

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 60128 144.68 1858 1827 403.0
A 12 96 32573 76.3 1858 1827 403.0
A 0 226 11651 24.38 1858 1827 403.0
B 6 159 9206239 25984.98 1855 1813 354.2
B 0 190 193423 540.93 1855 1813 354.2
B 0 183 121225 337.11 1855 1813 354.2
C 0 10 529004 1259.4 1776 1772 418.6
C 14 225 84172 196.83 1776 1772 418.6
C 2 114 64264 149.27 1776 1772 418.6
D 8 195 4645187 10297.85 1805 1757 450.9
D 2 250 439545 970.89 1805 1757 450.9
D 13 174 303694 669.61 1805 1757 450.9

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