ASTROSAT CZTI

Data Quality Report

Orbit 35351

Creation date: 2022-04-13T09:35:27.704454
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/AS1A11_093T01_9000005064_35351cztM0_level2.evt modeM0/AS1A11_093T01_9000005064_35351cztM0_level2_quad_clean.evt
Size (bytes)1,416,960,000220,115,520
Size1.3 GB 209.9 MB
Events in quadrant A8,267,5981,399,166
Events in quadrant B9,784,0001,416,886
Events in quadrant C9,755,4661,404,169
Events in quadrant D13,970,2451,284,813

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0345355
B0393994
C0386974
D0528716

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03460
B03460
C03460
D03460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0830
B0830
C0830
D0830

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16839210.124710%
B168393922.327929%
C168392801.662807%
D168389695.754840%

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 25148 16843 2 2 0.01% 0.01%
B 25148 16843 292 292 1.16% 1.73%
C 25148 16843 257 257 1.02% 1.53%
D 25148 16843 894 894 3.55% 5.31%

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 83 281742 701.15 2024 1990 399.0
A 13 6 55171 133.29 2024 1990 399.0
A 9 143 43893 105.02 2024 1990 399.0
B 5 172 1029789 2795.91 1984 1931 367.6
B 5 236 574538 1557.57 1984 1931 367.6
B 4 232 134910 361.72 1984 1931 367.6
C 0 10 921570 2100.58 1935 1949 437.8
C 15 214 693361 1579.31 1935 1949 437.8
C 3 233 297369 674.79 1935 1949 437.8
D 7 80 3211205 7002.75 1917 1865 458.3
D 8 195 913030 1988.15 1917 1865 458.3
D 10 118 617235 1342.73 1917 1865 458.3

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