Calibration Results (Photometry)
The Calibration Results page is a member of
the
Aperture
Photometry Properties dialog. Items in the table are used for
calculating the photometric zero point, which calibrates the
measurements to an instrumental system. They are calculated as a
result of the photometric zero point calibration.
Photometric Calibration Properties
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Image
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The name of the image.
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Zero Pt
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The photometric zero point used for the image. The
value listed is the one currently used, which may originate in 3
ways:
1. Initially, the value is taken from the ZERO-PT
keyword in the image header.
2. If Mira calculates a new zero point, then that
value is listed.
3. You can force a specific zero point value for
the image. To do this, simply type a new value into the table and
click [Apply].
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Error
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The standard deviation of the calculated zero point
for the image. the header keyword for this quantity is
ZEROPERR.
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# Stds
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The number of standard stars used in calculating
the zero point for this image. The header keyword for this quantity
is PHOTNSTD.
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The table columns can be resized by dragging the
vertical separator bars between the column headings. To see more
data outside the window, use the scrollbars.
Header Keywords
The information shown in the Calibration table is
added to the headers of the images. This information is saved
permanently to the image files only if you
save the image(s) in the standard way. These
keywords are added to the header as shown below.
Editing Calibration Data
Changing values in the calibration table is simply
a matter of clicking on a cell and typing new numbers into the
target cell. Additional tools are provided in a pop-up menu that is
opened by right-clicking on the table. The menu provides the
ability to copy or save data from the table. In addition, if
working with an image set, the calibration menu provides tools for
copying specific cells to other cells of the table.
Note
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The particular commands available in the menu
depend upon whether a single image or an image set is being
measured and whether a single cell or a range of cells is
selected.
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Copying Table Values to Other Cells
The example below shows how to copy cell contents
to other cells of the table. In this example, we wish to copy the
zero point value from the top row (first image) to the 5 images
following. To do this, the table must have the Selection Mode set to "Multiple" or "Row" (do
this using the Selection Mode command in the
Grid Context Menu).
To copy cells in multi-selection mode,
-
Click on the cell(s) in the row you wish to
copy.
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Drag the mouse to the final cell to highlight a
copying range. You may also click on the first cell of the range,
then use the standard Windows protocol of holding down
the[Shift] key and clicking on the
last cell of the range.
-
Right-click on the table to open the pop-up
menu.
-
In the menu, click the mouse on the Fill... command you wish to use. Fill down and Fill
up duplicate only those cells that are selected. Fill top row down copies the entire top row
except for the image name.
-
To update the values to the images, click
[Apply].
Changed table values are not saved permanently to
the image files unless you save the images using one of the
standard
saving methods.
Related Topics
Aperture Photometry
Aperture
Photometry Properties
Mira Pro x64 User's Guide, Copyright Ⓒ 2023 Mirametrics, Inc. All
Rights Reserved.
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