ASTROSAT CZTI

Data Quality Report

Orbit 20161029_A02_114T01_9000000764_level2

Creation date: 2025-11-07T12:46:12.023222
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/AS1A02_114T01_9000000764cztM0_level2.fits modeM0/AS1A02_114T01_9000000764cztM0_level2_quad_clean.evt
Size (bytes)576,532,800576,144,000
Size549.8 MB 549.5 MB
Events in quadrant A3,423,2383,401,129
Events in quadrant B3,355,2763,413,674
Events in quadrant C3,427,8083,290,147
Events in quadrant D2,918,1283,008,727

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0870
B0870
C0870
D0880

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012860
B012880
C012880
D012880

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01302000
B01320650
C01296750
D01522230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6318310351.638099%
B6318611651.843763%
C632057751.226169%
D6318916312.581145%

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 81520 63227 0 0 0.00% 0.00%
B 81520 63231 0 0 0.00% 0.00%
C 81520 63232 0 0 0.00% 0.00%
D 81520 63205 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 14 188 3462 11.59 886 826 227.4
A 0 29 3401 11.33 886 826 227.4
A 14 204 2968 9.42 886 826 227.4
B 2 9 2915 11.5 883 837 180.7
B 14 254 2322 8.22 883 837 180.7
B 3 17 2308 8.14 883 837 180.7
C 1 80 2536 7.05 904 835 241.3
C 1 81 2470 6.78 904 835 241.3
C 12 241 2391 6.45 904 835 241.3
D 3 14 2241 6.63 831 751 224.6
D 6 231 2200 6.45 831 751 224.6
D 7 5 2125 6.12 831 751 224.6

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