ASTROSAT CZTI

Data Quality Report

Orbit 50495

Creation date: 2025-01-28T13:47:59.916509
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/AS1T05_239T01_9000006444_50495cztM0_level2.fits modeM0/AS1T05_239T01_9000006444_50495cztM0_level2_quad_clean.evt
Size (bytes)641,263,68088,678,080
Size611.6 MB 84.6 MB
Events in quadrant A4,421,524599,776
Events in quadrant B4,375,081644,561
Events in quadrant C5,737,299555,058
Events in quadrant D8,695,602428,441

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0176001
B0176601
C0216211
D0303662

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65523535.387668%
B65534867.416450%
C65536299.598657%
D6552177127.029915%

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 7457 6552 229 229 3.07% 3.50%
B 7458 6553 252 252 3.38% 3.85%
C 7458 6554 464 464 6.22% 7.08%
D 7457 6552 1770 1770 23.74% 27.01%

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 10 253 1012145 5995.95 693 677 168.7
A 3 130 140114 826.58 693 677 168.7
A 4 249 104904 617.85 693 677 168.7
B 7 0 824273 5648.59 685 661 145.8
B 4 206 312676 2139.89 685 661 145.8
B 0 246 169056 1154.9 685 661 145.8
C 15 235 1032637 5609.52 660 654 184.0
C 15 195 234269 1269.85 660 654 184.0
C 12 247 228012 1235.84 660 654 184.0
D 7 61 2837524 17290.21 596 575 164.1
D 11 161 1678878 10228.67 596 575 164.1
D 6 42 310927 1891.49 596 575 164.1

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