ASTROSAT CZTI

Data Quality Report

Orbit 55992

Creation date: 2026-02-06T12:53:23.705672
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_55992cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55992cztM0_level2_quad_clean.evt
Size (bytes)1,292,342,400271,486,080
Size1.2 GB 258.9 MB
Events in quadrant A12,540,8231,714,098
Events in quadrant B9,760,5341,909,326
Events in quadrant C11,264,8271,651,983
Events in quadrant D12,738,4211,580,718

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0513332
B0430142
C0482312
D0516112

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04000
B04000
C04000
D04000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1979414017.077902%
B197955912.985602%
C1979511275.693357%
D1979510585.344784%

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 20669 19794 909 909 4.40% 4.59%
B 20670 19795 32 32 0.15% 0.16%
C 20670 19795 793 793 3.84% 4.01%
D 20670 19795 830 830 4.02% 4.19%

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 7 64 1229330 2373.26 2107 2049 517.1
A 0 8 866835 1672.28 2107 2049 517.1
A 14 32 802005 1546.92 2107 2049 517.1
B 0 199 362816 793.29 2120 2037 454.8
B 2 249 322317 704.24 2120 2037 454.8
B 0 173 218371 475.68 2120 2037 454.8
C 15 199 1782004 3222.21 2040 2024 552.4
C 12 254 663007 1196.54 2040 2024 552.4
C 14 254 206041 369.32 2040 2024 552.4
D 2 249 2226431 3839.78 2063 1975 579.3
D 6 42 387001 664.62 2063 1975 579.3
D 3 12 375052 643.99 2063 1975 579.3

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