ASTROSAT CZTI

Data Quality Report

Orbit 20210211_A10_097T04_9000004170_level2

Creation date: 2025-12-20T12:30:52.939395
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/AS1A10_097T04_9000004170cztM0_level2.fits modeM0/AS1A10_097T04_9000004170cztM0_level2_quad_clean.evt
Size (bytes)635,797,440524,387,520
Size606.3 MB 500.1 MB
Events in quadrant A3,951,5503,027,327
Events in quadrant B3,814,9323,060,463
Events in quadrant C3,837,0822,871,865
Events in quadrant D3,296,9762,566,019

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012880
B012880
C012880
D012880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0970
C0980
D0980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01370540
B01351610
C01347790
D01749880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6349113252.086910%
B6349512211.922986%
C6348314002.205315%
D6349025123.956529%

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 72108 63479 0 0 0.00% 0.00%
B 72108 63482 0 0 0.00% 0.00%
C 72108 63469 0 0 0.00% 0.00%
D 72108 63442 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 3781 11.01 1029 966 255.7
A 7 110 3163 8.59 1029 966 255.7
A 0 30 3086 8.29 1029 966 255.7
B 2 9 2986 10.22 1009 963 197.9
B 2 8 2526 7.9 1009 963 197.9
B 5 128 2517 7.85 1009 963 197.9
C 1 81 2992 7.96 1013 951 256.6
C 1 80 2897 7.58 1013 951 256.6
C 12 241 2666 6.68 1013 951 256.6
D 3 14 2424 6.24 940 854 251.7
D 15 46 2402 6.15 940 854 251.7
D 6 67 2289 5.7 940 854 251.7

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