ASTROSAT CZTI

Data Quality Report

Orbit 51742

Creation date: 2025-04-22T13:12:40.415173
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_51742cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51742cztM0_level2_quad_clean.evt
Size (bytes)529,427,52096,563,520
Size504.9 MB 92.1 MB
Events in quadrant A4,267,808639,315
Events in quadrant B3,786,658698,067
Events in quadrant C4,321,688615,121
Events in quadrant D6,722,043522,273

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0200
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170202
B0155915
C0172112
D0244202

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64401392.158385%
B64391472.282963%
C64392614.053424%
D643992114.303463%

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 7599 6440 82 82 1.08% 1.27%
B 7598 6439 63 63 0.83% 0.98%
C 7598 6439 187 187 2.46% 2.90%
D 7598 6439 859 859 11.31% 13.34%

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 4 175 374077 2082.79 723 706 179.3
A 11 3 297217 1654.04 723 706 179.3
A 4 3 158014 877.52 723 706 179.3
B 8 128 157662 1028.08 714 692 152.7
B 10 254 153305 999.54 714 692 152.7
B 4 174 98941 643.48 714 692 152.7
C 13 3 369929 1892.97 703 698 195.1
C 10 171 223952 1144.57 703 698 195.1
C 14 245 184009 939.79 703 698 195.1
D 11 129 3081571 16479.11 667 642 187.0
D 8 176 642944 3435.51 667 642 187.0
D 11 176 77478 410.98 667 642 187.0

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