ASTROSAT CZTI

Data Quality Report

Orbit 57878

Creation date: 2026-06-09T13:06:25.871063
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_125T11_9000006582_57878cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57878cztM0_level2_quad_clean.evt
Size (bytes)490,613,760107,144,640
Size467.9 MB 102.2 MB
Events in quadrant A3,150,889721,349
Events in quadrant B3,564,782769,486
Events in quadrant C7,534,535576,943
Events in quadrant D3,314,235642,983

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154080
B0162090
C0275870
D0157400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A766870.091288%
B7668580.756390%
C7669127616.638414%
D7669150.195593%

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 0 0 0.00% 0.00%
B 7668 7668 16 16 0.21% 0.21%
C 7669 7669 988 988 12.88% 12.88%
D 7669 7669 13 13 0.17% 0.17%

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 7 64 19286 91.87 809 787 201.4
A 4 3 12040 55.88 809 787 201.4
A 3 137 9916 45.34 809 787 201.4
B 7 252 95719 555.23 801 770 171.0
B 7 0 79058 457.8 801 770 171.0
B 5 185 58035 334.87 801 770 171.0
C 15 224 2789588 14208.99 722 714 196.3
C 12 2 1134991 5779.01 722 714 196.3
C 2 12 401775 2043.36 722 714 196.3
D 2 31 59734 269.53 783 747 218.9
D 5 173 58535 264.05 783 747 218.9
D 3 12 53267 239.98 783 747 218.9

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