ASTROSAT CZTI

Data Quality Report

Orbit 51541

Creation date: 2025-04-09T01:23:14.089484
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_51541cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51541cztM0_level2_quad_clean.evt
Size (bytes)1,853,159,040226,702,080
Size1.7 GB 216.2 MB
Events in quadrant A18,332,3961,384,430
Events in quadrant B10,752,5681,746,050
Events in quadrant C10,285,2861,575,916
Events in quadrant D27,887,970959,476

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0664759
B0435914
C0424744
D0949494

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0350
C0350
D0350

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03540
B03540
C03540
D03540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17368296317.060111%
B173697904.548333%
C173694992.872935%
D17368677939.031552%

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 20269 17369 2032 2032 10.03% 11.70%
B 20269 17370 289 289 1.43% 1.66%
C 20269 17372 264 264 1.30% 1.52%
D 20268 17370 6085 6085 30.02% 35.03%

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 3241351 7317.27 1803 1758 442.7
A 12 250 2229231 5031.19 1803 1758 442.7
A 12 3 2082984 4700.86 1803 1758 442.7
B 10 44 678752 1673.94 1901 1836 404.4
B 0 171 442858 1090.6 1901 1836 404.4
B 15 52 329231 809.61 1901 1836 404.4
C 3 233 1038532 2029.72 1868 1850 510.8
C 13 3 901067 1760.58 1868 1850 510.8
C 15 1 131130 253.12 1868 1850 510.8
D 8 176 18324159 43205.53 1511 1454 424.1
D 12 6 2503480 5899.86 1511 1454 424.1
D 1 3 162403 379.52 1511 1454 424.1

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