The discovery was announced via the Central Bureau for Astronomical Telegrams on June 20, 2021 as Electronic Telegram No 4981. Note that a subscription may be required to access the published document.
A paper has been published in Volume 49 (Jan-Mar 2022) of The Minor Planet Bulletin.
Download Volume 49 Issue 1 (Paper begins on page 3).
Authors of the paper are:
Dave Gault - Trans Tasman Occultation Alliance
Peter Nosworthy - Trans Tasman Occultation Alliance
Richard Nolthenius - Cabrillo College, Santa Cruz, CA, USA and IOTA
Kirk Bender - Cabrillo College, Santa Cruz, CA, USA
Dave Herald - Trans Tasman Occultation Alliance
A paper on Arxiv.org by Tanga et al. cites our paper in the Minor Planet Bulletin.
Section 5.2.1 discusses Binary systems. It starts on page 15, and spends two pages on Arecibo with a detailed analysis. It includes a fit of the derived orbit to the two occultation events.
Download in PDF (Arecibo is discussed starting near the end of page 15).
The Journal for Occultation Astronomy has published an item summarising our presentation, in July 2021, to the 39th Annual Meeting of the International Occultation Timing Association.
Download JOA Issue 2022-1 (Item begins on page 38).
There is a Wikipedia page for the asteroid (4337) Arecibo. The page covers our discovery of the asteroid's moon.