Changes between Version 72 and Version 73 of HetProcedures/HighSpeedBib


Ignore:
Timestamp:
Oct 31, 2019 12:24:29 AM (5 years ago)
Author:
sco
Comment:

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  • HetProcedures/HighSpeedBib

    v72 v73  
    138138  [astronomer@mcs Bib]$  biblook /hetdata/data/ImageQuality/20191029/Bib/20191029_0910_1017.bmp N
    139139or, if you are inthe working directory:
    140    [astronomer@mcs Bib]$ biblook /hetdata/data/ImageQuality/20191029/Bib/20191029_0910_1017.bmp N
     140   [astronomer@mcs Bib]$ biblook 20191029_0910_1017.bmp N
    141141}}}
    142142Note that the image basename (20191029_0910_9) and file format (bmp) are specified as two distinct command line arguments. This was done in case the user wished to record other image formats (like tiff). The user places a circle marker around the star and enters a return . At that point the user is shown a single line of values. The header indicates that the second number from the end of the line is the peak value. Here is an example:
    143143{{{
    144 # Contents of:  midodata.2
    145 Col01 = X pixels (aperture X center)                   
    146 Col02 = Y pixels (aperture Y center)                   
    147 Col03 = X center, pixels (intensity weighted centroid)
    148 Col04 = Y center, pixels (intensity weighted centroid)
    149 Col05 = magnitude (assuming zp=30)                     
    150 Col06 = Average value per pixel in aperture           
    151 Col07 = Average value per pixel in annulus             
    152 Col08 = number of pixels in aperture                   
    153 Col09 = Peak pixel value (no bkg-sub, image ADU)       
    154 Col10 = marker code (1=circle,2=box,3=ellipse)         
    155    106.04     79.07    106.62     78.27  21.475    91.238    87.188      635.0     204.33   1
     144The final measured peak in the BIB star = 82.66
    156145}}}
    157146You can answer "N" to the next couple questions about cleaning files. It is the usual case that we delete all of the ASCII files made in this process since we are usually just measuring test images in preparation for taking the real data. In the above example we see that the peak level measured in our star image was 204 adu. This would be a safe level for taking high speed BIB images.