ASTROSAT CZTI

Data Quality Report

Orbit 20180427_A04_225T01_9000002062_level2

Creation date: 2018-05-01T16:43:11.271734
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_225T01_9000002062cztM0_level2_bc.evt modeM0/AS1A04_225T01_9000002062cztM0_level2_quad_clean.evt
Size (bytes)4,007,603,5201,520,256,960
Size3.7 GB 1.4 GB
Events in quadrant A24,629,6859,772,709
Events in quadrant B24,675,25410,132,325
Events in quadrant C23,606,9819,798,314
Events in quadrant D41,340,5709,180,147

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021300
B021300
C021300
D021300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02277490
B02265610
C02177440
D02796930

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01810
B01810
C01810
D01810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10455421692.074526%
B10455418451.764638%
C1045549480.906708%
D10455438163.649789%

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 122815 104559 154 154 0.13% 0.15%
B 122815 104556 47 47 0.04% 0.04%
C 122815 104560 2 2 0.00% 0.00%
D 122815 104557 428 428 0.35% 0.41%

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 14 111 2691754 2261.0 5456 5355 1188.1
A 8 15 239433 197.01 5456 5355 1188.1
A 15 222 229530 188.68 5456 5355 1188.1
B 0 189 539943 505.63 5604 5456 1057.1
B 4 80 425120 397.01 5604 5456 1057.1
B 3 209 399915 373.16 5604 5456 1057.1
C 3 233 2264684 1889.13 5419 5373 1196.0
C 12 4 55027 41.52 5419 5373 1196.0
C 8 128 38059 27.33 5419 5373 1196.0
D 13 122 8513285 6335.77 5274 5144 1342.9
D 1 52 2630353 1954.92 5274 5144 1342.9
D 10 157 2231166 1657.66 5274 5144 1342.9

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