ASTROSAT CZTI

Data Quality Report

Orbit 20200919_A09_038T19_9000003892_level2

Creation date: 2021-01-08T06:18:36.508962
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/AS1A09_038T19_9000003892cztM0_level2_bc.evt modeM0/AS1A09_038T19_9000003892cztM0_level2_quad_clean.evt
Size (bytes)869,195,520223,142,400
Size828.9 MB 212.8 MB
Events in quadrant A2,722,6611,574,752
Events in quadrant B13,057,3901,344,124
Events in quadrant C2,618,1591,570,464
Events in quadrant D7,021,8941,356,582

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02700
B02700
C02700
D02700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0274250
B0603570
C0274490
D0481010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A131484923.742014%
B13148550041.831457%
C131485674.312443%
D13148275920.984180%

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 14068 13146 0 0 0.00% 0.00%
B 14068 13129 2072 2072 14.73% 15.78%
C 14068 13146 0 0 0.00% 0.00%
D 14068 13145 362 362 2.57% 2.75%

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 5 168 52806 348.0 678 664 149.8
A 8 192 33772 220.97 678 664 149.8
A 13 254 19684 126.94 678 664 149.8
B 0 189 10392435 90109.55 589 574 115.3
B 10 246 132865 1147.11 589 574 115.3
B 10 245 104661 902.55 589 574 115.3
C 15 208 28088 170.97 672 669 160.4
C 2 16 4069 21.2 672 669 160.4
C 13 61 3916 20.25 672 669 160.4
D 1 52 3072793 22058.36 609 589 139.3
D 7 80 1133405 8133.59 609 589 139.3
D 2 250 272264 1950.62 609 589 139.3

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