Find observations of the H alpha brightness of LDN 1616

[will-henney]

We want to compare this with the predictions of the ionized flow model, which @RobeReyes will calculate in issue #2

[will-henney]

I have found the following all-sky map:

• https://faun.rc.fas.harvard.edu/dfink/skymaps/halpha/data/v1_1/index.html
• Finkbeiner (2013)

The angular resolution is about 6 arcmin, which is similar to the radius of the globule. So we will only have about 2 resolution elements across the globule, but hopefully that will be enough.

[will-henney]

I have measured the brightness of the H alpha emission from the globule using the Finkbeiner map.

In the map units, the peak brightness is 50 and the local background is 20, giving a net brightness of 30.