ASTROSAT CZTI

Data Quality Report

Orbit 20161231_A02_174T04_9000000938_level2

Creation date: 2017-09-22T17:42:20.728208
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/AS1A02_174T04_9000000938cztM0_level2.evt modeM0/AS1A02_174T04_9000000938cztM0_level2_quad_clean.evt
Size (bytes)8,964,645,1201,468,301,760
Size8.3 GB 1.4 GB
Events in quadrant A59,598,9729,062,132
Events in quadrant B61,926,1149,181,764
Events in quadrant C63,652,2769,069,701
Events in quadrant D77,976,6018,679,733

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01920
B01920
C01920
D01920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02610650
B02667250
C02716250
D03157120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025260
B025260
C025260
D025260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12372514831.198626%
B12372924551.984175%
C12373117711.431331%
D12372839173.165815%

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 155948 123763 113 113 0.07% 0.09%
B 155948 123763 666 666 0.43% 0.54%
C 155948 123768 715 715 0.46% 0.58%
D 155948 123761 2118 2118 1.36% 1.71%

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 15 2261171 751.31 14790 14466 2990.4
A 13 248 204573 63.57 14790 14466 2990.4
A 0 226 145617 43.86 14790 14466 2990.4
B 0 228 2455427 871.13 14863 14523 2802.0
B 0 219 419138 144.4 14863 14523 2802.0
B 15 204 337742 115.35 14863 14523 2802.0
C 9 68 3792034 1140.19 14388 14445 3313.1
C 9 247 1820046 544.98 14388 14445 3313.1
C 12 16 1055658 314.27 14388 14445 3313.1
D 8 195 9826898 2787.38 14292 13856 3520.5
D 2 33 4018177 1137.42 14292 13856 3520.5
D 14 34 2498825 705.85 14292 13856 3520.5

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