ASTROSAT CZTI

Data Quality Report

Orbit 51681

Creation date: 2025-04-22T12:01:07.899097
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_031T01_9000006462_51681cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51681cztM0_level2_quad_clean.evt
Size (bytes)522,417,60094,469,760
Size498.2 MB 90.1 MB
Events in quadrant A4,033,563617,366
Events in quadrant B4,169,550665,981
Events in quadrant C7,356,479537,756
Events in quadrant D3,258,513572,103

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0165922
B0171022
C0264792
D0148622

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67001442.149254%
B67012163.223399%
C6701110716.519922%
D6701721.074466%

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 7694 6699 106 106 1.38% 1.58%
B 7695 6700 136 136 1.77% 2.03%
C 7695 6700 1093 1093 14.20% 16.31%
D 7695 6700 60 60 0.78% 0.90%

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 7 64 432450 2535.19 691 676 170.3
A 3 14 239590 1402.8 691 676 170.3
A 15 174 171301 1001.84 691 676 170.3
B 5 172 722492 4902.86 687 663 147.2
B 10 254 202608 1371.67 687 663 147.2
B 5 173 108104 729.77 687 663 147.2
C 15 189 2077945 11846.78 637 634 175.3
C 5 250 1119563 6381.19 637 634 175.3
C 12 254 586817 3342.97 637 634 175.3
D 8 176 163812 866.56 670 645 188.3
D 2 249 81942 431.76 670 645 188.3
D 5 173 60996 320.52 670 645 188.3

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