ASTROSAT CZTI

Data Quality Report

Orbit 52494

Creation date: 2025-06-20T13:22:24.334593
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_037T01_9000006476_52494cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52494cztM0_level2_quad_clean.evt
Size (bytes)897,929,28073,918,080
Size856.3 MB 70.5 MB
Events in quadrant A2,880,531678,100
Events in quadrant B6,661,523543,695
Events in quadrant C8,884,686431,993
Events in quadrant D14,335,197153,777

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0131192
B0239641
C0306691
D0468241

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6163330.535454%
B6163139422.618854%
C6163193031.315918%
D6163467375.823463%

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 7143 6164 5 5 0.07% 0.08%
B 7143 6164 1231 1231 17.23% 19.97%
C 7143 6164 1848 1848 25.87% 29.98%
D 7142 6162 4609 4609 64.53% 74.80%

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 11 3 51463 288.03 689 672 176.3
A 13 248 24314 134.07 689 672 176.3
A 4 3 19224 105.21 689 672 176.3
B 10 44 3856995 29981.66 591 572 128.6
B 4 81 171482 1328.74 591 572 128.6
B 0 213 59883 461.11 591 572 128.6
C 15 224 4730008 30631.55 542 538 154.4
C 15 248 990616 6412.48 542 538 154.4
C 2 12 627568 4061.11 542 538 154.4
D 15 93 8545613 64491.21 450 430 132.5
D 6 42 2160901 16305.26 450 430 132.5
D 8 176 756062 5702.82 450 430 132.5

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