ASTROSAT CZTI

Data Quality Report

Orbit 55712

Creation date: 2026-01-20T14:31:47.865495
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/AS1A14_099T04_9000006540_55712cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55712cztM0_level2_quad_clean.evt
Size (bytes)665,173,440102,444,480
Size634.4 MB 97.7 MB
Events in quadrant A6,806,195657,907
Events in quadrant B3,254,512760,700
Events in quadrant C4,770,269650,481
Events in quadrant D9,196,354498,897

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0255620
B0157720
C0200780
D0326870

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A76696708.736472%
B7670160.208605%
C76705076.610169%
D7670187824.485007%

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 7668 7668 644 644 8.40% 8.40%
B 7669 7669 2 2 0.03% 0.03%
C 7669 7669 513 513 6.69% 6.69%
D 7669 7669 1874 1874 24.44% 24.44%

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 15 32 2647085 13860.06 772 753 190.9
A 0 8 517574 2706.83 772 753 190.9
A 12 115 264351 1380.58 772 753 190.9
B 5 236 33992 195.33 790 760 170.1
B 2 249 23496 133.64 790 760 170.1
B 12 111 21041 119.21 790 760 170.1
C 6 223 1513787 7328.47 755 745 206.5
C 13 3 182820 881.89 755 745 206.5
C 12 252 63142 302.22 755 745 206.5
D 11 129 5664271 29052.91 692 663 194.9
D 8 245 607911 3115.03 692 663 194.9
D 10 181 66120 335.78 692 663 194.9

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