ASTROSAT CZTI

Data Quality Report

Orbit 55201

Creation date: 2025-12-11T10:01:29.911076
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_022T16_9000006532_55201cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55201cztM0_level2_quad_clean.evt
Size (bytes)421,718,400110,364,480
Size402.2 MB 105.3 MB
Events in quadrant A3,601,996732,846
Events in quadrant B3,054,111767,264
Events in quadrant C3,303,767700,522
Events in quadrant D5,107,352654,848

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160982
B0146512
C0154122
D0205483

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69851672.390838%
B6985861.231210%
C6985751.073729%
D69844506.443299%

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 7905 6986 63 63 0.80% 0.90%
B 7905 6986 8 8 0.10% 0.11%
C 7905 6986 32 32 0.40% 0.46%
D 7904 6985 329 329 4.16% 4.71%

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 378432 1909.24 766 748 197.8
A 0 8 72959 365.04 766 748 197.8
A 3 45 55999 279.3 766 748 197.8
B 10 247 20226 119.94 750 725 162.6
B 12 111 19422 115.0 750 725 162.6
B 11 111 17955 105.97 750 725 162.6
C 13 3 135734 640.25 739 729 210.9
C 14 254 120269 566.91 739 729 210.9
C 6 13 69591 326.57 739 729 210.9
D 2 249 923866 4230.54 732 698 218.2
D 2 62 543614 2487.98 732 698 218.2
D 7 96 301268 1377.4 732 698 218.2

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