ASTROSAT CZTI

Data Quality Report

Orbit 57818

Creation date: 2026-06-05T12:15:20.167334
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/AS1A14_083T16_9000006580_57818cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57818cztM0_level2_quad_clean.evt
Size (bytes)469,566,72097,824,960
Size447.8 MB 93.3 MB
Events in quadrant A3,215,061651,360
Events in quadrant B3,165,925692,265
Events in quadrant C6,238,372561,344
Events in quadrant D4,221,420572,674

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144161
B0146711
C0233981
D0176062

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69551341.926671%
B69562103.018976%
C695693013.369753%
D69552613.752696%

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 7410 6956 1 1 0.01% 0.01%
B 7411 6957 14 14 0.19% 0.20%
C 7411 6957 671 671 9.05% 9.64%
D 7410 6956 150 150 2.02% 2.16%

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 3 128 201339 1092.19 739 720 183.7
A 3 14 128223 694.14 739 720 183.7
A 7 64 11912 60.93 739 720 183.7
B 7 252 78611 502.18 730 701 155.1
B 5 172 47836 303.82 730 701 155.1
B 10 247 34050 214.96 730 701 155.1
C 15 224 1937588 10408.54 692 683 186.1
C 9 38 1203908 6465.89 692 683 186.1
C 14 254 130650 698.42 692 683 186.1
D 12 110 685663 3437.53 713 681 199.3
D 2 249 214697 1074.02 713 681 199.3
D 3 224 138264 690.45 713 681 199.3

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