ASTROSAT CZTI

Data Quality Report

Orbit 58551

Creation date: 2026-07-24T20:10:22.091518
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_044T04_9000006592_58551cztM0_level2.fits modeM0/AS1A14_044T04_9000006592_58551cztM0_level2_quad_clean.evt
Size (bytes)477,722,88088,179,840
Size455.6 MB 84.1 MB
Events in quadrant A3,001,632600,072
Events in quadrant B5,191,295577,672
Events in quadrant C3,392,030563,731
Events in quadrant D5,612,213491,367

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0133821
B0197083
C0145391
D0209021

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6257761.214640%
B625778612.561931%
C62571482.365351%
D625774111.842736%

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 7012 6258 5 5 0.07% 0.08%
B 7012 6258 452 452 6.45% 7.22%
C 7012 6258 83 83 1.18% 1.33%
D 7012 6258 651 651 9.28% 10.40%

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 4 3 93690 535.57 694 674 173.7
A 4 249 85580 488.88 694 674 173.7
A 3 245 44508 252.39 694 674 173.7
B 6 255 1518902 10792.46 650 625 140.7
B 0 171 283062 2007.66 650 625 140.7
B 8 234 260285 1845.76 650 625 140.7
C 4 5 316480 1721.95 668 661 183.4
C 12 252 140237 761.01 668 661 183.4
C 9 237 113435 614.88 668 661 183.4
D 2 31 1292716 7144.73 643 614 180.8
D 2 249 627001 3463.63 643 614 180.8
D 8 240 530564 2930.38 643 614 180.8

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