ASTROSAT CZTI

Data Quality Report

Orbit 20180307_A04_104T04_9000001966_level2

Creation date: 2025-11-20T01:18:09.722342
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/AS1A04_104T04_9000001966cztM0_level2.fits modeM0/AS1A04_104T04_9000001966cztM0_level2_quad_clean.evt
Size (bytes)653,739,840603,371,520
Size623.5 MB 575.4 MB
Events in quadrant A4,015,7443,547,622
Events in quadrant B3,782,6883,483,356
Events in quadrant C4,021,3243,488,950
Events in quadrant D3,177,4522,958,087

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01462100
B01794690
C01444100
D02467810

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014280
B014280
C014280
D014280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6991710441.493199%
B6991950057.158283%
C699157081.012658%
D699161103215.778935%

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 80769 69919 0 0 0.00% 0.00%
B 80769 69756 0 0 0.00% 0.00%
C 80769 69919 0 0 0.00% 0.00%
D 80769 69886 0 0 0.00% 0.00%

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 0 29 3843 10.87 1046 978 263.5
A 7 110 3155 8.26 1046 978 263.5
A 0 30 2935 7.43 1046 978 263.5
B 2 9 3350 12.11 997 949 198.3
B 2 8 2569 8.17 997 949 198.3
B 5 128 2540 8.02 997 949 198.3
C 2 191 2773 6.43 1063 986 277.7
C 12 241 2756 6.37 1063 986 277.7
C 3 126 2746 6.34 1063 986 277.7
D 7 3 2282 5.99 905 822 243.7
D 6 231 2276 5.97 905 822 243.7
D 3 159 2271 5.95 905 822 243.7

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