ASTROSAT CZTI

Data Quality Report

Orbit 20151126_P01_889T01_9000000174_level2

Creation date: 2017-10-26T17:13:03.336745
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/AS1P01_889T01_9000000174cztM0_level2.evt modeM0/AS1P01_889T01_9000000174cztM0_level2_quad_clean.evt
Size (bytes)300,326,40028,699,200
Size286.4 MB 27.4 MB
Events in quadrant A2,108,974191,689
Events in quadrant B2,881,618183,619
Events in quadrant C2,041,538189,043
Events in quadrant D1,952,581184,086

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0340
C0340
D0340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A074060
B097160
C072240
D069560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A163510.061162%
B163516610.152905%
C163450.305998%
D163530.183486%

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 2050 1636 142 142 6.93% 8.68%
B 2050 1636 512 512 24.98% 31.30%
C 2050 1636 128 128 6.24% 7.82%
D 2050 1636 115 115 5.61% 7.03%

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 8 192 4039 25.73 547 550 135.6
A 11 79 2697 15.83 547 550 135.6
A 10 133 1777 9.05 547 550 135.6
B 3 0 605650 4406.34 564 566 137.3
B 5 249 52830 380.59 564 566 137.3
B 8 38 38193 274.0 564 566 137.3
C 15 241 6716 42.24 514 534 146.4
C 3 111 6042 37.63 514 534 146.4
C 7 159 4941 30.11 514 534 146.4
D 12 188 75915 484.89 492 508 155.5
D 1 4 25089 158.06 492 508 155.5
D 13 170 5996 35.29 492 508 155.5

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