ASTROSAT CZTI

Data Quality Report

Orbit 20161125_A02_118T01_9000000826_level2

Creation date: 2017-09-19T06:22:22.056187
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_118T01_9000000826cztM0_level2.evt modeM0/AS1A02_118T01_9000000826cztM0_level2_quad_clean.evt
Size (bytes)7,685,507,5201,377,144,000
Size7.2 GB 1.3 GB
Events in quadrant A51,202,0149,157,783
Events in quadrant B52,249,6959,087,621
Events in quadrant C37,861,8949,200,062
Events in quadrant D85,625,3768,334,338

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02098300
B02142070
C01766150
D03143470

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017660
B017660
C017660
D017660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01370
B01370
C01370
D01370

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8650813081.511999%
B8650845455.253849%
C865087840.906275%
D865081087212.567624%

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 100400 86514 50 50 0.05% 0.06%
B 100400 86512 2466 2466 2.46% 2.85%
C 100400 86514 12 12 0.01% 0.01%
D 100400 86511 9522 9522 9.48% 11.01%

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 8791378 4425.39 9862 9645 1984.4
A 15 236 3612080 1815.38 9862 9645 1984.4
A 13 251 331908 162.4 9862 9645 1984.4
B 3 64 8044108 4395.19 9804 9558 1828.0
B 0 219 3754846 2048.81 9804 9558 1828.0
B 15 204 1129737 612.78 9804 9558 1828.0
C 1 16 218790 95.88 9599 9629 2181.6
C 9 54 132388 56.27 9599 9629 2181.6
C 13 61 77019 30.89 9599 9629 2181.6
D 2 63 29194945 13154.18 9210 8915 2218.8
D 12 220 12959007 5836.62 9210 8915 2218.8
D 2 152 2991104 1344.08 9210 8915 2218.8

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