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--- chara:pavo_analysis_manual [2018/11/29 14:59]
jones [l0_l1_gui.pro]
+++ chara:pavo_analysis_manual [2018/11/29 15:30] (current)
jones [l1_l2_gui.pro]
@@ Line 93: / Line 93: @@
 ==== l1_l2_gui.pro ====
-A GUI extension of l1_l2.pro to calibrate data, including multi-bracket calibration and proper uncertainty calculations using Monte-Carlo simulations. This program can only be run with the output of l0_l1_gui.pro (see above). \\  \\ Walkthrough: \\ 1) Load the output file generated by l0_l1_gui.pro. If you run the program for the first time it will search for coordinates using querysimbad to calculate projected baselines etc, which takes a few minutes. \\ 2) Load your estimated calibrator diameters using the CAL DIAMETERS button - see diamsfile keyword in l1_l2.pro above. The third column can be used to specify diameter uncertainties for the calibrators. ***This step is mandatory for sensible science calibration*** \\ 3) Using the TARGETS and CALS boxes in the second row you can calibrate individual scans of data, including averages of multiple scans (separated by a comma in the box). The scan numbers including information on elevation, azimuth, time between scans and expected diameter can be found in the top right box. This feature should be used to identify the brackets that you want to use for the final calibration, and to identify bad calibrators (e.g. by calibrating calibrators with each other). An example screenshot can be found [[:chara:file_view_l1l2_1.png_232661548_l1l2_1.png|here]]. \\
+A GUI extension of l1_l2.pro to calibrate data, including multi-bracket calibration and proper uncertainty calculations using Monte-Carlo simulations. This program can only be run with the output of l0_l1_gui.pro (see above). \\  \\ Walkthrough: \\ 1) Load the output file generated by l0_l1_gui.pro. If you run the program for the first time it will search for coordinates using querysimbad to calculate projected baselines etc, which takes a few minutes. \\ 2) Load your estimated calibrator diameters using the CAL DIAMETERS button - see diamsfile keyword in l1_l2.pro above. The third column can be used to specify diameter uncertainties for the calibrators. ***This step is mandatory for sensible science calibration*** \\ 3) Using the TARGETS and CALS boxes in the second row you can calibrate individual scans of data, including averages of multiple scans (separated by a comma in the box). The scan numbers including information on elevation, azimuth, time between scans and expected diameter can be found in the top right box. This feature should be used to identify the brackets that you want to use for the final calibration, and to identify bad calibrators (e.g. by calibrating calibrators with each other). An example screenshot can be found {{:chara:files:l1l2_1.png?linkonly|here}}. \\
 ) Once you have identified the brackets that should be used for calibration, edit the l1l2.config file and specify the brackets by listing the .pav files as shown in the example (note that you need to give the full path to the .pav files if they are not in the same directory). The parameters in the top part of the file are relevant for the Monte-Carlo simulations used to estimate uncertainties. A mandatory parameter to edit here is the estimate for the limb-darkening coefficient of your star (set to 0 if you want a UD fit). \\
 ) Load your config file using the LOAD CONFIG FILE button and press CALIBRATE to perform the multi-bracket calibration. A LD/UD will be performed automatically. Press OUTPUT FILES to output the data of this graph. \\
-) Pressing RUN MC will start the Monte-Carlo simulations to calculate uncertainties of the UD fit to the data. The simulations include uncertainties in wavelength scale, calibrator diameters, measurement errors, limb-darkening coefficient and correlations between wavelength channels (see [[:chara:file_view_l1_l2.tiff_232656708_l1_l2.tiff|here]] for an example output screenshot). This feature is so far only implemented for a simple UD fit. \\
+) Pressing RUN MC will start the Monte-Carlo simulations to calculate uncertainties of the UD fit to the data. The simulations include uncertainties in wavelength scale, calibrator diameters, measurement errors, limb-darkening coefficient and correlations between wavelength channels (see {{:chara:files:l1_l2.jpg?linkonly|here}} for an example output screenshot). This feature is so far only implemented for a simple UD fit. \\
  \\
 Note: /exp is default in this program as I've found it to improve the calibration in almost all cases.

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