Use query_ssa() for Euclid tutorials 3 & 5

[jkrick]

Mostly just updated to use the IRSA preferred query_ssa() to look for spectra.

For notebook 3, I switched from searching for a spectrum by objectID to searching by coords. I feel this is a more generically useful approach.

Minor other changes:

• updated date
• updated author list
• cleaned up goals for 3rd notebook to reflect notebook (I think they were copied from a different notebook and never checked)

This will close #141

[jkrick]

@tmesh for some reason I can't tag you to review these changes, but wanted to get your thoughts, and eventually seal of approval since you wrote these tutorials.

[bsipocz]

I have a couple of comments, and one more outstanding todo for myself to see if we can avoid adding the warning handlings.

[bsipocz]

Keep this one, please; if jupyerlab removes it automatically then we need to report it upstream; but in the meantime probably need to do patch git add

[bsipocz]

Keep the comment

Suggested change

	!pip install matplotlib astropy 'astroquery>=0.4.10'
	# !pip install matplotlib astropy 'astroquery>=0.4.10'

[bsipocz]

TODO for bsipocz: check if we need this or something has been shipped upstream already; but even if it did it would very likely be in a very recent release so we can't cleanup just yet.

[bsipocz]

keep the short title

[bsipocz]

Simplify it:

Suggested change

	coord_obj = SkyCoord(
	ra=float(obj_row["ra"][0]) * u.deg,
	dec=float(obj_row["dec"][0]) * u.deg,
	)
	coord_obj = SkyCoord(obj_row["ra"][0], obj_row["dec"][0], unit=u.deg)

Also, why do we cut this for just the first one?

[bsipocz]

I think you need to keep the heading level her

Suggested change

	###### About this Notebook
	## About this Notebook

[bsipocz]

Thank you!

I bunch of smaller comments, the most critical ones is git add changes in batches so we leave the metadata alone as we need that for the rendering.