ASTROSAT CZTI

Data Quality Report

Orbit 20180124_A02_058T03_9000001870_level2

Creation date: 2018-01-25T10:16:58.609152
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_058T03_9000001870cztM0_level2_bc.evt modeM0/AS1A02_058T03_9000001870cztM0_level2_quad_clean.evt
Size (bytes)460,483,200164,580,480
Size439.2 MB 157.0 MB
Events in quadrant A2,709,3441,050,894
Events in quadrant B3,472,3471,062,851
Events in quadrant C2,691,9021,062,806
Events in quadrant D4,222,514952,788

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02520
B02520
C02520
D02520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0258050
B0293480
C0255950
D0311340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400
B0400
C0400
D0400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12374690.557621%
B123743793.062874%
C12374340.274770%
D123745414.372070%

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 16385 12375 0 0 0.00% 0.00%
B 16385 12374 3 3 0.02% 0.02%
C 16385 12374 0 0 0.00% 0.00%
D 16384 12374 269 269 1.64% 2.17%

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 12 189 73215 490.18 678 666 148.0
A 12 96 21253 139.1 678 666 148.0
A 13 248 5403 32.01 678 666 148.0
B 4 239 542965 4188.52 690 675 129.5
B 3 64 52953 403.78 690 675 129.5
B 0 230 46863 356.75 690 675 129.5
C 15 208 43104 288.29 673 665 147.2
C 14 234 8478 53.07 673 665 147.2
C 8 222 4498 26.04 673 665 147.2
D 1 52 1419717 9646.28 648 624 147.1
D 10 157 94946 641.15 648 624 147.1
D 13 104 75340 507.88 648 624 147.1

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