On the Availability of ESO Data Papers on arXiv/astro-ph

The Messenger 170 – December 2017 everyone for all permitted uses. These are governed by CC licenses. Some publishers offer the option for authors to pay an article processing charge (APC) to make individual articles available through open access in otherwise subscription-based journals; this is then called “hybrid OA”. 3. Delayed and temporary OA: Responding to the mandates issued by governments and funding agencies, many journals are applying delayed OA by providing free access to their publications after a given time. Most core astronomy journals are currently available and are free to read after one year, with the exception of MNRAS, which is only free to read three years after publication. Since these articles were originally published in a subscriptionbased (toll-access) journal, there is no CC license. Alternatively, publishers may choose to provide free access to specific sections or articles — for Uta Grothkopf1 Dominic Bordelon1 Silvia Meakins1 Eric Emsellem1