ASTROSAT CZTI

Data Quality Report

Orbit 20210223_T03_272T01_9000004204_level2

Creation date: 2025-12-20T19:18:17.482589
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/AS1T03_272T01_9000004204cztM0_level2.fits modeM0/AS1T03_272T01_9000004204cztM0_level2_quad_clean.evt
Size (bytes)720,627,840599,906,880
Size687.2 MB 572.1 MB
Events in quadrant A4,760,3123,798,530
Events in quadrant B4,444,5943,760,200
Events in quadrant C4,017,6022,765,103
Events in quadrant D3,464,0682,722,105

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01210
B01210
C01210
D01210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015200
B015200
C015200
D015200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01555900
B01795000
C03407860
D03246550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A746567671.027379%
B7465620932.803526%
C746562125828.474604%
D746561952526.153290%

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 89267 74658 0 0 0.00% 0.00%
B 89267 74651 0 0 0.00% 0.00%
C 89267 74604 0 0 0.00% 0.00%
D 89267 74115 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 3917 9.01 1243 1170 304.8
A 7 110 3722 8.37 1243 1170 304.8
A 9 19 3476 7.56 1243 1170 304.8
B 2 9 3578 10.68 1180 1132 229.1
B 2 8 2981 8.07 1180 1132 229.1
B 3 17 2949 7.93 1180 1132 229.1
C 1 81 3133 7.93 1062 998 269.1
C 1 80 3102 7.82 1062 998 269.1
C 12 241 2808 6.73 1062 998 269.1
D 15 46 2570 6.37 990 906 261.3
D 6 67 2472 5.99 990 906 261.3
D 10 189 2347 5.51 990 906 261.3

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