ASTROSAT CZTI

Data Quality Report

Orbit 51427

Creation date: 2025-04-01T08:59:41.214757
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/AS1A13_090T01_9000006458_51427cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51427cztM0_level2_quad_clean.evt
Size (bytes)1,024,076,160105,212,160
Size976.6 MB 100.3 MB
Events in quadrant A9,592,834712,357
Events in quadrant B4,779,022860,160
Events in quadrant C16,211,414310,951
Events in quadrant D6,661,549706,778

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0345136
B0202061
C0540241
D0257631

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01720
B01720
C01720
D01720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8575124614.530612%
B85763053.556437%
C8576538862.826493%
D85764395.118937%

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 8680 8576 979 979 11.28% 11.42%
B 8681 8577 64 64 0.74% 0.75%
C 8680 8576 4908 4908 56.54% 57.23%
D 8681 8577 404 404 4.65% 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 3 1756359 7925.74 892 871 221.5
A 12 250 1489046 6718.86 892 871 221.5
A 7 64 991733 4473.58 892 871 221.5
B 5 172 253696 1251.45 937 902 202.0
B 5 185 244758 1207.2 937 902 202.0
B 7 252 88135 431.84 937 902 202.0
C 4 12 7914854 53145.06 542 538 148.9
C 15 179 4567894 30670.04 542 538 148.9
C 15 230 736180 4939.87 542 538 148.9
D 7 80 990636 3959.19 901 868 250.0
D 8 176 551754 2203.61 901 868 250.0
D 6 42 340284 1357.71 901 868 250.0

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