ASTROSAT CZTI

Data Quality Report

Orbit 51839

Creation date: 2025-04-29T03:06:21.055376
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/AS1C09_011T05_9000006466_51839cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51839cztM0_level2_quad_clean.evt
Size (bytes)602,334,72089,902,080
Size574.4 MB 85.7 MB
Events in quadrant A3,782,719619,297
Events in quadrant B4,179,393662,673
Events in quadrant C4,345,684584,666
Events in quadrant D9,470,919389,969

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157421
B0171961
C0176041
D0327243

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6671931.394094%
B66722073.102518%
C66723425.125899%
D6671238035.676810%

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 7551 6672 44 44 0.58% 0.66%
B 7552 6673 87 87 1.15% 1.30%
C 7552 6673 261 261 3.46% 3.91%
D 7551 6672 1975 1975 26.16% 29.60%

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 170257 977.24 697 679 173.5
A 5 240 147353 845.25 697 679 173.5
A 11 3 131527 754.05 697 679 173.5
B 5 172 423182 2890.26 690 667 146.2
B 5 32 256288 1748.6 690 667 146.2
B 1 207 171170 1166.34 690 667 146.2
C 13 3 787071 4223.4 678 670 186.2
C 15 219 121835 650.72 678 670 186.2
C 15 224 102743 548.19 678 670 186.2
D 11 129 3436980 21922.28 558 539 156.8
D 12 6 1518970 9686.61 558 539 156.8
D 3 12 890710 5678.72 558 539 156.8

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