ASTROSAT CZTI

Data Quality Report

Orbit 55885

Creation date: 2026-01-26T11:14:25.247967
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_030T02_9000006544_55885cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55885cztM0_level2_quad_clean.evt
Size (bytes)650,312,640106,986,240
Size620.2 MB 102.0 MB
Events in quadrant A9,436,787600,098
Events in quadrant B3,698,452778,945
Events in quadrant C5,679,684656,054
Events in quadrant D4,646,677656,425

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0335122
B0165832
C0226952
D0192362

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7875159020.190476%
B78761501.904520%
C78767189.116303%
D78761351.714068%

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 9400 7877 1427 1427 15.18% 18.12%
B 9401 7878 4 4 0.04% 0.05%
C 9401 7878 433 433 4.61% 5.50%
D 9401 7878 73 73 0.78% 0.93%

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 4186142 21719.13 783 760 192.7
A 15 32 1316263 6826.52 783 760 192.7
A 7 64 375726 1945.8 783 760 192.7
B 0 197 101506 561.62 833 800 179.3
B 0 199 89120 492.54 833 800 179.3
B 7 0 86857 479.92 833 800 179.3
C 12 254 2241558 10439.79 789 783 214.6
C 12 252 150689 698.41 789 783 214.6
C 15 199 101635 469.87 789 783 214.6
D 2 62 609872 2667.84 808 770 228.3
D 3 12 142726 621.76 808 770 228.3
D 2 31 138584 603.62 808 770 228.3

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