ASTROSAT CZTI

Data Quality Report

Orbit 20200624_A07_127T03_9000003732_level2

Creation date: 2025-12-12T23:58:53.655564
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/AS1A07_127T03_9000003732cztM0_level2.fits modeM0/AS1A07_127T03_9000003732cztM0_level2_quad_clean.evt
Size (bytes)650,053,440490,728,960
Size619.9 MB 468.0 MB
Events in quadrant A3,320,1802,809,635
Events in quadrant B3,200,6872,838,697
Events in quadrant C6,654,1023,124,790
Events in quadrant D2,761,1182,337,493

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0860
B0840
C0830
D0850

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01223470
B01147740
C01139860
D01786420

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011140
B011160
C011200
D011120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5467710391.900251%
B5467410191.863774%
C5472410891.989986%
D5456142237.739961%

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 65740 54940 0 0 0.00% 0.00%
B 65740 54940 0 0 0.00% 0.00%
C 65740 55006 0 0 0.00% 0.00%
D 65740 54777 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 2768 9.18 864 806 213.7
A 7 110 2656 8.66 864 806 213.7
A 9 19 2494 7.9 864 806 213.7
B 2 9 2541 10.31 845 804 168.5
B 3 80 2123 7.83 845 804 168.5
B 2 8 2117 7.79 845 804 168.5
C 9 209 4222 6.59 1775 1757 374.2
C 3 187 3725 5.26 1775 1757 374.2
C -1 -1 -1 -1.0 1775 1757 374.2
D 3 14 2034 6.27 787 718 209.9
D 15 46 1964 5.93 787 718 209.9
D 13 238 1957 5.9 787 718 209.9

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