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I have an open cluster with calculated percentage of polarization and position angle. I want to have it's scatter plot in Ra vs Dec plane and superimpose a galactic parallel on it. How to plot the galactic parallel? Like the line b=-0.14 deg shown in the figure. I have used python for the scatter plot and also I have plotted the percentage of polarization and position angle but I am unable to the plot the galactic latitude line. Can anyone help me in this regard? enter image description here

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    $\begingroup$ Pick a point on your plot that you'd like th galactic parallel to pass through. Convert equatorial to galactic using widely available conversion equations. Then pick a point same latitude different longitude and convert galactic to equatorial. Then you have two points on the parallel. For the scale you're showing the different longitude should be about 1/4 degree different. $\endgroup$
    – stretch
    Commented Jun 14, 2023 at 13:20
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    $\begingroup$ Okay. Thank you so much. I was able to do it. $\endgroup$
    – Samrat Biswas
    Commented Jun 15, 2023 at 16:13

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