ASTROSAT CZTI

Data Quality Report

Orbit 56444

Creation date: 2026-03-05T02:14:43.256125
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_083T05_9000006554_56444cztM0_level2.fits modeM0/AS1A14_083T05_9000006554_56444cztM0_level2_quad_clean.evt
Size (bytes)678,291,84090,144,000
Size646.9 MB 86.0 MB
Events in quadrant A8,987,211501,752
Events in quadrant B5,968,598598,958
Events in quadrant C3,766,818604,156
Events in quadrant D5,857,574549,449

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0314732
B0224622
C0163252
D0222752

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6816173525.454812%
B6816105615.492958%
C68161452.127347%
D68164176.117958%

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 7721 6816 1659 1659 21.49% 24.34%
B 7721 6816 914 914 11.84% 13.41%
C 7721 6817 134 134 1.74% 1.97%
D 7721 6817 397 397 5.14% 5.82%

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 95 2450616 14826.04 660 641 165.2
A 3 14 2043723 12363.72 660 641 165.2
A 12 3 896612 5421.97 660 641 165.2
B 5 172 2324634 16311.78 657 634 142.5
B 1 159 340196 2383.33 657 634 142.5
B 4 206 312490 2188.87 657 634 142.5
C 1 16 470425 2490.78 688 683 188.6
C 6 223 131881 695.67 688 683 188.6
C 1 29 107226 564.94 688 683 188.6
D 5 113 992112 5107.35 671 639 194.1
D 12 3 865931 4457.36 671 639 194.1
D 2 249 374900 1927.92 671 639 194.1

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