ASTROSAT CZTI

Data Quality Report

Orbit 52874

Creation date: 2025-07-16T11:50:51.866053
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/AS1C09_011T08_9000006482_52874cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52874cztM0_level2_quad_clean.evt
Size (bytes)869,788,80063,123,840
Size829.5 MB 60.2 MB
Events in quadrant A14,182,50313,446
Events in quadrant B7,228,670512,727
Events in quadrant C5,895,625464,761
Events in quadrant D4,435,770510,126

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0459911
B0254851
C0216041
D0171862

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5863577998.567286%
B5864137623.465211%
C5864108718.536835%
D58632654.519870%

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 7017 5862 5397 5397 76.91% 92.07%
B 7019 5864 1061 1061 15.12% 18.09%
C 7019 5865 900 900 12.82% 15.35%
D 7018 5864 227 227 3.23% 3.87%

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 9 191 12956012 205545.62 246 240 63.0
A 3 62 49359 779.28 246 240 63.0
A 0 8 48944 772.7 246 240 63.0
B 8 3 4065962 33413.05 575 556 121.7
B 7 0 162959 1334.77 575 556 121.7
B 5 185 158362 1296.99 575 556 121.7
C 2 12 1731901 11516.76 547 541 150.3
C 15 224 1062073 7061.16 547 541 150.3
C 7 80 399320 2652.62 547 541 150.3
D 8 176 767204 4478.72 600 574 171.2
D 12 191 379987 2216.56 600 574 171.2
D 8 48 329404 1921.05 600 574 171.2

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