ASTROSAT CZTI

Data Quality Report

Orbit 20170419_A03_084T01_9000001188_level2

Creation date: 2025-11-11T14:07:30.237322
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/AS1A03_084T01_9000001188cztM0_level2.fits modeM0/AS1A03_084T01_9000001188cztM0_level2_quad_clean.evt
Size (bytes)240,727,680236,361,600
Size229.6 MB 225.4 MB
Events in quadrant A1,470,1561,431,356
Events in quadrant B1,422,2761,432,383
Events in quadrant C1,450,2961,356,781
Events in quadrant D1,136,9441,128,820

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05340
B05340
C05340
D05340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0557180
B0569500
C0593630
D0842640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A262947782.958850%
B262948413.198448%
C262909853.746672%
D26295399415.189199%

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 28952 26293 0 0 0.00% 0.00%
B 28952 26295 0 0 0.00% 0.00%
C 28952 26294 0 0 0.00% 0.00%
D 28952 25732 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 1475 11.57 381 356 96.7
A 0 29 1460 11.41 381 356 96.7
A 14 204 1241 9.15 381 356 96.7
B 2 9 1214 10.91 375 354 78.8
B 3 17 1003 8.24 375 354 78.8
B 5 232 992 8.1 375 354 78.8
C 12 241 1054 6.79 383 353 103.3
C 1 80 1034 6.6 383 353 103.3
C 1 81 1008 6.34 383 353 103.3
D 3 14 849 6.32 323 292 88.2
D 6 231 838 6.19 323 292 88.2
D 7 5 828 6.08 323 292 88.2

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