ASTROSAT CZTI

Data Quality Report

Orbit 51789

Creation date: 2025-04-25T17:45:44.685002
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_9000006464_51789cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51789cztM0_level2_quad_clean.evt
Size (bytes)869,834,88095,244,480
Size829.5 MB 90.8 MB
Events in quadrant A7,758,584623,216
Events in quadrant B8,226,062593,959
Events in quadrant C5,527,662650,692
Events in quadrant D10,097,926486,236

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0282800
B0295930
C0216480
D0352800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7608114315.023659%
B7608190425.026288%
C76086428.438486%
D7608224829.547844%

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 7608 7608 580 580 7.62% 7.62%
B 7608 7608 1339 1339 17.60% 17.60%
C 7608 7608 373 373 4.90% 4.90%
D 7607 7607 1915 1915 25.17% 25.17%

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 2 143 2076590 10213.29 827 806 203.2
A 4 175 1346020 6618.74 827 806 203.2
A 12 3 149004 729.17 827 806 203.2
B 10 128 4016023 23765.21 777 748 169.0
B 4 206 490366 2897.9 777 748 169.0
B 0 171 152500 898.17 777 748 169.0
C 13 3 811037 3627.03 822 816 223.4
C 12 252 205088 914.44 822 816 223.4
C 0 209 188970 842.29 822 816 223.4
D 11 129 5740828 27919.49 747 721 205.6
D 3 12 353533 1716.05 747 721 205.6
D 8 176 326709 1585.58 747 721 205.6

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