ASTROSAT CZTI

Data Quality Report

Orbit 55839

Creation date: 2026-01-23T08:51:51.176271
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_127T10_9000006542_55839cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55839cztM0_level2_quad_clean.evt
Size (bytes)549,898,56095,382,720
Size524.4 MB 91.0 MB
Events in quadrant A6,034,508575,453
Events in quadrant B3,389,031704,422
Events in quadrant C2,874,757633,508
Events in quadrant D7,533,565504,208

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0224612
B0150062
C0139192
D0270652

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A674187813.024774%
B67421171.735390%
C6742340.504301%
D6742117717.457728%

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 9141 6742 739 739 8.08% 10.96%
B 9142 6744 53 53 0.58% 0.79%
C 9142 6744 7 7 0.08% 0.10%
D 9142 6742 1035 1035 11.32% 15.35%

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 12 115 2051520 12207.15 683 667 168.0
A 0 8 441593 2624.49 683 667 168.0
A 8 249 345750 2054.01 683 667 168.0
B 7 252 325782 2099.12 720 696 154.9
B 0 213 168735 1085.05 720 696 154.9
B 0 197 18760 116.64 720 696 154.9
C 15 131 21930 108.5 712 706 195.6
C 12 250 19927 98.26 712 706 195.6
C 1 16 17567 86.19 712 706 195.6
D 11 129 3960080 21588.73 640 611 183.4
D 3 12 612204 3334.67 640 611 183.4
D 15 125 270118 1469.47 640 611 183.4

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