pipeline.new_sources: New high sigma is actually the new low sigma

[ddobie]

See here:

vast-pipeline/vast_pipeline/pipeline/new_sources.py

Lines 431 to 442 in 6209e0d

	# We only care about the highest true sigma
	new_sources_df = new_sources_df.sort_values(
	by=['source', 'true_sigma']
	)
	# keep only the highest for each source, rename for the daatabase
	new_sources_df = (
	new_sources_df
	.drop_duplicates('source')
	.set_index('source')
	.rename(columns={'true_sigma': 'new_high_sigma'})
	)

sort_values automatically sorts in ascending order, meaning that the lowest true_sigma is sorted to the top. Dropping duplicates then drops all but the top entry, i.e. the lowest.

Fix is to add ascending=False to the sort_values call.

[ddobie]

Fixed in #714