ASTROSAT CZTI

Data Quality Report

Orbit 20180807_T02_077T01_9000002282_level2

Creation date: 2018-08-08T10:27:20.114933
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1T02_077T01_9000002282cztM0_level2_bc.evt modeM0/AS1T02_077T01_9000002282cztM0_level2_quad_clean.evt
Size (bytes)531,239,040235,391,040
Size506.6 MB 224.5 MB
Events in quadrant A3,809,3831,556,179
Events in quadrant B3,594,5491,576,959
Events in quadrant C3,472,4391,567,385
Events in quadrant D4,281,3491,492,162

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0340
C0340
D0340

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02760
B02760
C02760
D02760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0322250
B0303840
C0294640
D0321160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A135712872.114804%
B135711691.245302%
C135711050.773709%
D135712331.716896%

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 16086 13570 7 7 0.04% 0.05%
B 16086 13570 4 4 0.02% 0.03%
C 16086 13570 0 0 0.00% 0.00%
D 16086 13571 31 31 0.19% 0.23%

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 14 238 405098 2360.01 806 794 171.3
A 9 143 118810 688.89 806 794 171.3
A 14 237 115363 668.76 806 794 171.3
B 4 142 168490 1122.41 810 795 149.4
B 0 189 58819 388.36 810 795 149.4
B 0 197 53245 351.06 810 795 149.4
C 3 233 375732 2185.11 787 784 171.6
C 10 22 11286 61.2 787 784 171.6
C 0 207 6181 31.45 787 784 171.6
D 5 222 613143 3407.16 794 773 179.7
D 1 52 289230 1604.94 794 773 179.7
D 7 38 84528 466.0 794 773 179.7

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