ASTROSAT CZTI

Data Quality Report

Orbit 20180312_A04_167T02_9000001974_level2

Creation date: 2018-03-19T17:13:30.378596
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_167T02_9000001974cztM0_level2_bc.evt modeM0/AS1A04_167T02_9000001974cztM0_level2_quad_clean.evt
Size (bytes)2,017,169,280491,978,880
Size1.9 GB 469.2 MB
Events in quadrant A11,924,7433,108,799
Events in quadrant B14,592,3832,925,938
Events in quadrant C8,112,5773,237,910
Events in quadrant D23,759,4652,906,975

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0580
B0590
C0580
D0590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08080
B08100
C08080
D08080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0959040
B01235630
C0822310
D01411750

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3958310702.703181%
B39645731718.456300%
C396803080.776210%
D39466487512.352405%

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 51494 39835 111 111 0.22% 0.28%
B 51493 39678 314 314 0.61% 0.79%
C 51494 39951 2 2 0.00% 0.01%
D 51494 39631 562 562 1.09% 1.42%

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 2901015 6717.04 1995 1955 431.6
A 8 15 1087311 2514.74 1995 1955 431.6
A 1 162 124075 282.95 1995 1955 431.6
B 4 239 6407741 19017.4 1794 1747 336.8
B 3 64 283608 836.76 1794 1747 336.8
B 0 244 253318 746.84 1794 1747 336.8
C 15 208 89219 197.67 2021 1990 441.3
C 6 96 73931 163.03 2021 1990 441.3
C 14 234 27307 57.37 2021 1990 441.3
D 1 52 10057933 22824.07 1905 1837 440.6
D 13 249 5150439 11685.65 1905 1837 440.6
D 5 222 525926 1189.51 1905 1837 440.6

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