ASTROSAT CZTI

Data Quality Report

Orbit 20200722_A09_085T03_9000003764_level2

Creation date: 2025-12-13T19:32:43.551636
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_085T03_9000003764cztM0_level2.fits modeM0/AS1A09_085T03_9000003764cztM0_level2_quad_clean.evt
Size (bytes)635,117,760587,211,840
Size605.7 MB 560.0 MB
Events in quadrant A4,056,9803,554,369
Events in quadrant B3,832,1483,555,617
Events in quadrant C3,880,4823,440,092
Events in quadrant D2,986,4802,760,268

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01403710
B01388750
C01352630
D02684830

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013360
B013360
C013340
D013360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A652288311.273993%
B652168611.320228%
C6522210181.560823%
D651001395121.430108%

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 81041 65263 0 0 0.00% 0.00%
B 81041 65261 0 0 0.00% 0.00%
C 81041 65270 0 0 0.00% 0.00%
D 81041 64452 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 3564 9.91 1058 997 259.0
A 7 110 3159 8.35 1058 997 259.0
A 0 30 3123 8.21 1058 997 259.0
B 2 9 3082 10.78 1015 975 195.4
B 2 8 2611 8.37 1015 975 195.4
B 5 255 2551 8.07 1015 975 195.4
C 12 241 2721 6.87 1025 963 256.0
C 9 209 2637 6.54 1025 963 256.0
C 2 191 2609 6.43 1025 963 256.0
D 3 14 2220 6.41 852 777 225.1
D 10 189 2149 6.1 852 777 225.1
D 6 231 2109 5.92 852 777 225.1

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