ASTROSAT CZTI

Data Quality Report

Orbit 55950

Creation date: 2026-02-05T18:47:03.595361
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_066T02_9000006546_55950cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55950cztM0_level2_quad_clean.evt
Size (bytes)505,748,16090,023,040
Size482.3 MB 85.9 MB
Events in quadrant A6,073,157556,997
Events in quadrant B2,968,159641,896
Events in quadrant C3,982,188565,443
Events in quadrant D5,200,716514,112

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0223691
B0135861
C0164971
D0198061

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A640267710.574820%
B6402801.249609%
C64021061.655733%
D64025107.966261%

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 7252 6403 530 530 7.31% 8.28%
B 7252 6403 18 18 0.25% 0.28%
C 7252 6403 99 99 1.37% 1.55%
D 7252 6403 485 485 6.69% 7.57%

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 12 115 2165445 13299.16 646 630 162.8
A 7 64 1088831 6685.17 646 630 162.8
A 3 14 145484 889.89 646 630 162.8
B 7 252 75834 525.62 663 640 143.1
B 4 21 53046 366.33 663 640 143.1
B 5 185 44762 308.42 663 640 143.1
C 6 9 732615 4059.54 648 640 180.3
C 1 29 480086 2659.01 648 640 180.3
C 12 252 76906 422.97 648 640 180.3
D 11 129 1584029 8569.29 635 605 184.8
D 15 94 694353 3754.48 635 605 184.8
D 3 12 87154 468.39 635 605 184.8

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