ASTROSAT CZTI

Data Quality Report

Orbit 20180331_G08_032T01_9000001998_level2

Creation date: 2018-04-02T12:48:06.716934
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/AS1G08_032T01_9000001998cztM0_level2_bc.evt modeM0/AS1G08_032T01_9000001998cztM0_level2_quad_clean.evt
Size (bytes)757,324,800322,344,000
Size722.2 MB 307.4 MB
Events in quadrant A4,333,2672,031,188
Events in quadrant B4,750,3882,010,458
Events in quadrant C4,898,6092,163,685
Events in quadrant D7,447,7912,044,274

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0451530
B0465710
C0451260
D0556640

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04540
B04500
C04480
D04460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A220121460.663275%
B220122421.099400%
C219821250.568647%
D219668814.010744%

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 26150 22331 0 0 0.00% 0.00%
B 26150 22318 8 8 0.03% 0.04%
C 26150 22286 1 1 0.00% 0.00%
D 26150 22287 83 83 0.32% 0.37%

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 73181 295.71 1093 1070 243.9
A 1 162 27644 108.97 1093 1070 243.9
A 10 229 14466 54.93 1093 1070 243.9
B 3 64 174550 822.44 1084 1053 211.0
B 3 209 123353 579.75 1084 1053 211.0
B 4 142 80223 375.3 1084 1053 211.0
C 3 233 490717 1902.92 1113 1093 257.3
C 7 238 28835 107.82 1113 1093 257.3
C 8 222 12441 44.1 1113 1093 257.3
D 13 122 1353929 5061.99 1101 1058 267.3
D 5 222 667611 2494.02 1101 1058 267.3
D 8 195 451082 1683.84 1101 1058 267.3

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