ASTROSAT CZTI

Data Quality Report

Orbit 20180717_A04_218T08_9000002236_level2

Creation date: 2018-07-20T10:53:49.045814
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/AS1A04_218T08_9000002236cztM0_level2_bc.evt modeM0/AS1A04_218T08_9000002236cztM0_level2_quad_clean.evt
Size (bytes)3,391,439,0401,350,964,800
Size3.2 GB 1.3 GB
Events in quadrant A25,813,6398,595,057
Events in quadrant B21,979,4778,771,330
Events in quadrant C25,402,3478,761,626
Events in quadrant D23,086,8708,323,944

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02162080
B02030910
C02103480
D02037650

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019240
B019240
C019240
D019240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9439911261.192809%
B9439915081.597475%
C943998450.895137%
D9439911071.172682%

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 112185 94401 5 5 0.00% 0.01%
B 112185 94395 82 82 0.07% 0.09%
C 112185 94396 10 10 0.01% 0.01%
D 112185 94397 138 138 0.12% 0.15%

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 15 239 6141731 5777.37 4873 4783 1062.2
A 0 253 443718 413.22 4873 4783 1062.2
A 12 189 358429 332.92 4873 4783 1062.2
B 3 64 1468169 1582.62 4974 4850 924.6
B 0 229 364815 389.31 4974 4850 924.6
B 4 48 204224 215.63 4974 4850 924.6
C 3 233 5959570 5517.88 4878 4820 1079.2
C 9 236 127786 113.94 4878 4820 1079.2
C 3 9 125074 111.43 4878 4820 1079.2
D 2 16 2074256 1852.87 4850 4681 1117.0
D 2 33 660511 587.16 4850 4681 1117.0
D 10 70 479737 425.31 4850 4681 1117.0

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