ASTROSAT CZTI

Data Quality Report

Orbit 20210718_T04_027T01_9000004552_level2

Creation date: 2025-12-27T10:24:33.145853
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_027T01_9000004552cztM0_level2.fits modeM0/AS1T04_027T01_9000004552cztM0_level2_quad_clean.evt
Size (bytes)445,394,880356,048,640
Size424.8 MB 339.6 MB
Events in quadrant A2,781,3082,040,376
Events in quadrant B2,589,0761,977,588
Events in quadrant C2,663,5341,914,613
Events in quadrant D2,385,7621,779,653

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0650
B0650
C0650
D0650

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09080
B09080
C09080
D09080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0926330
B01380030
C0969960
D01055080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A447133190.713439%
B4473710102.257639%
C4470110542.357889%
D447325001.117768%

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 51427 44734 0 0 0.00% 0.00%
B 51427 44752 0 0 0.00% 0.00%
C 51427 44719 0 0 0.00% 0.00%
D 51427 44748 0 0 0.00% 0.00%

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 0 29 2651 11.08 724 681 177.8
A 7 110 2279 8.99 724 681 177.8
A 9 19 2062 7.77 724 681 177.8
B 2 9 2060 10.36 685 655 135.6
B 2 8 1831 8.67 685 655 135.6
B 3 80 1735 7.96 685 655 135.6
C 12 241 1923 7.07 706 660 178.5
C 3 187 1782 6.28 706 660 178.5
C 3 126 1779 6.27 706 660 178.5
D 3 14 1745 6.15 681 623 182.6
D 10 189 1695 5.87 681 623 182.6
D 6 67 1688 5.83 681 623 182.6

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