Managed to upload the first version of the Herald-Bobroff index to the SAC database version 8 on my website as it's a bit big an upload to CN (1.5MB Zipped Excel sheet).

The index has been generated by means of an Excel sheet. I did not check whether the labels of each object are visible on the charts: for instance NGC 51 is computed as being visible on the B and C charts but there's no "NGC 51" label on either chart series.

This Excel sheet only adds a couple columns after the original SAC database columns.

You can find it here

Comments are welcome of course!

Cheers,

Olivier