ASTROSAT CZTI

Data Quality Report

Orbit 20200812_A09_143T05_9000003804_level2

Creation date: 2025-12-14T07:39:02.674302
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/AS1A09_143T05_9000003804cztM0_level2.fits modeM0/AS1A09_143T05_9000003804cztM0_level2_quad_clean.evt
Size (bytes)169,634,880154,382,400
Size161.8 MB 147.2 MB
Events in quadrant A1,048,630933,248
Events in quadrant B997,218922,494
Events in quadrant C965,526785,294
Events in quadrant D874,560782,739

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0373060
B0396410
C0586220
D0498710

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03700
B03700
C03700
D03700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A181411390.766220%
B181412811.548977%
C18141192810.627860%
D181419845.424177%

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 20401 18140 0 0 0.00% 0.00%
B 20401 18141 0 0 0.00% 0.00%
C 20401 18129 0 0 0.00% 0.00%
D 20401 18139 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 7 110 887 9.04 272 255 69.9
A 0 29 870 8.79 272 255 69.9
A 0 30 805 7.86 272 255 69.9
B 2 9 862 11.28 263 252 54.1
B 5 232 684 7.99 263 252 54.1
B 2 8 676 7.84 263 252 54.1
C 1 81 754 7.7 254 236 67.3
C 1 80 722 7.22 254 236 67.3
C 12 241 688 6.72 254 236 67.3
D 3 14 658 6.26 249 227 68.9
D 10 189 631 5.87 249 227 68.9
D 6 231 625 5.78 249 227 68.9

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