ASTROSAT CZTI

Data Quality Report

Orbit 51450

Creation date: 2025-04-02T21:06:24.071710
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_51450cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51450cztM0_level2_quad_clean.evt
Size (bytes)592,634,88091,048,320
Size565.2 MB 86.8 MB
Events in quadrant A6,014,717568,727
Events in quadrant B5,284,425618,923
Events in quadrant C6,146,702556,662
Events in quadrant D3,987,926559,296

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0223221
B0201461
C0226831
D0164721

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A649682612.715517%
B649779612.251809%
C649779812.282592%
D64972383.663229%

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 7575 6495 711 711 9.39% 10.95%
B 7576 6496 528 528 6.97% 8.13%
C 7576 6496 710 710 9.37% 10.93%
D 7576 6496 196 196 2.59% 3.02%

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 1775434 10572.65 683 666 167.9
A 15 174 515194 3065.15 683 666 167.9
A 12 3 455149 2707.45 683 666 167.9
B 5 185 1572473 10929.59 679 656 143.8
B 4 206 397748 2761.17 679 656 143.8
B 15 52 135962 940.85 679 656 143.8
C 4 12 1491503 8169.39 663 654 182.5
C 15 179 625636 3424.71 663 654 182.5
C 13 3 570875 3124.63 663 654 182.5
D 8 176 712449 3731.6 688 662 190.7
D 8 192 159519 832.82 688 662 190.7
D 10 181 112474 586.18 688 662 190.7

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