ASTROSAT CZTI

Data Quality Report

Orbit 20180611_A04_016T01_9000002152_level2

Creation date: 2018-06-13T11:14:59.060613
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_016T01_9000002152cztM0_level2_bc.evt modeM0/AS1A04_016T01_9000002152cztM0_level2_quad_clean.evt
Size (bytes)2,021,218,560740,790,720
Size1.9 GB 706.5 MB
Events in quadrant A12,432,8354,734,072
Events in quadrant B12,010,8694,792,568
Events in quadrant C16,942,3664,686,901
Events in quadrant D16,175,6304,549,316

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01070
B01070
C01070
D01070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170730
B01142960
C01335470
D01297540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010920
B010920
C010920
D010920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A535816351.185122%
B535817871.468804%
C535815941.108602%
D5358118273.409791%

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 64198 53580 1 1 0.00% 0.00%
B 64198 53579 4 4 0.01% 0.01%
C 64198 53577 2 2 0.00% 0.00%
D 64198 53579 185 185 0.29% 0.35%

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 1 162 548660 876.28 2865 2805 622.9
A 0 23 290209 461.38 2865 2805 622.9
A 8 15 240866 382.17 2865 2805 622.9
B 0 229 239599 441.11 2894 2817 536.8
B 0 189 209055 384.21 2894 2817 536.8
B 0 214 136841 249.68 2894 2817 536.8
C 3 233 5875120 9546.44 2821 2780 615.1
C 13 61 16538 22.37 2821 2780 615.1
C 3 232 12157 15.24 2821 2780 615.1
D 10 199 2271662 3545.9 2802 2724 639.9
D 12 110 1790744 2794.32 2802 2724 639.9
D 10 70 788655 1228.25 2802 2724 639.9

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