ASTROSAT CZTI

Data Quality Report

Orbit 51747

Creation date: 2025-04-22T22:32:20.724165
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/AS1A13_090T01_9000006464_51747cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51747cztM0_level2_quad_clean.evt
Size (bytes)771,860,160105,667,200
Size736.1 MB 100.8 MB
Events in quadrant A6,795,759668,902
Events in quadrant B6,484,347724,866
Events in quadrant C5,361,604695,378
Events in quadrant D9,318,664560,584

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0254310
B0247010
C0213770
D0331845

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79017499.479813%
B790282310.415085%
C79022703.416856%
D7901155919.731680%

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 7901 7901 733 733 9.28% 9.28%
B 7902 7902 605 605 7.66% 7.66%
C 7902 7902 248 248 3.14% 3.14%
D 7901 7901 1442 1442 18.25% 18.25%

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 8 62 1480617 7289.18 828 806 203.0
A 12 3 566232 2785.15 828 806 203.0
A 8 246 393874 1936.16 828 806 203.0
B 4 206 1790180 10227.99 807 780 175.0
B 4 174 822023 4694.13 807 780 175.0
B 8 128 130592 741.99 807 780 175.0
C 15 230 288914 1276.8 825 818 225.6
C 14 245 282871 1250.01 825 818 225.6
C 15 218 273219 1207.24 825 818 225.6
D 11 129 4043350 18632.27 770 744 217.0
D 8 176 1126441 5188.31 770 744 217.0
D 7 159 188794 866.72 770 744 217.0

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