ASTROSAT CZTI

Data Quality Report

Orbit 51646

Creation date: 2025-04-16T04:14:47.605960
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_037T05_9000006460_51646cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51646cztM0_level2_quad_clean.evt
Size (bytes)651,352,320102,781,440
Size621.2 MB 98.0 MB
Events in quadrant A7,739,446602,638
Events in quadrant B3,883,938761,290
Events in quadrant C4,285,140671,360
Events in quadrant D7,624,682557,694

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0281640
B0165770
C0181720
D0278970

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7455130917.558685%
B7454410.550040%
C74541461.958680%
D7454102413.737591%

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 7455 7455 980 980 13.15% 13.15%
B 7454 7454 17 17 0.23% 0.23%
C 7454 7454 116 116 1.56% 1.56%
D 7454 7454 944 944 12.66% 12.66%

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 12 250 1673066 8981.15 743 726 186.2
A 7 64 1128392 6056.03 743 726 186.2
A 15 174 870015 4668.44 743 726 186.2
B 10 44 94087 545.72 795 768 171.0
B 0 171 92542 536.69 795 768 171.0
B 8 128 50162 288.85 795 768 171.0
C 15 148 306251 1429.07 776 769 213.8
C 12 254 205867 959.46 776 769 213.8
C 0 209 140538 653.85 776 769 213.8
D 7 60 1854174 9045.53 724 699 204.9
D 3 12 773944 3773.67 724 699 204.9
D 8 176 401166 1954.4 724 699 204.9

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