Archive for October 22, 2019

Not the Open Journal of Astrophysics Impact Factor

Posted in Open Access with tags , , , on October 22, 2019 by telescoper

Yesterday evening, after I’d finished my day job, I was doing some work on the Open Journal of Astrophysics ahead of a talk I am due to give this afternoon as part of the current Research Week at Maynooth University. The main thing I was doing was checking on citations for the papers we have published so far, to be sure that the Crossref mechanism is working properly and the papers were appearing correctly on, e.g., the NASA/ADS system. There are one or two minor things that need correcting, but it’s basically doing fine.

In the course of all that I remembered that when I’ve been giving talks about the Open Journal project quite a few people have asked me about its Journal Impact Factor. My usual response is (a) to repeat the arguments why the impact factor is daft and (b) point out that we have to have been running continuously for at least two years to have an official impact factor so we don’t really have one.

For those of you who can’t be bothered to look up the definition of an impact factor , for a given year it is basically the sum of the citations in a given year for all papers published in the journal over the previous two-year period divided by the total number of papers published in that journal over the same period. It’s therefore the average citations per paper published in a two-year window. The impact factor for 2019 would be defined using citations to papers publish in 2017 and 2018, etc.

The Open Journal of Astrophysics didn’t publish any papers in 2017 and only one in 2018 so obviously we can’t define an official impact factor for 2019. However, since I was rummaging around with bibliometric data at the time I could work out the average number of citations per paper for the papers we have published so far in 2019. That number is:

I stress again that this is not the Impact Factor for the Open Journal but it is a rough indication of the citation impact of our papers. For reference (but obviously not comparison) the latest actual impact factors (2018, i.e. based on 2016 and 2017 numbers) for some leading astronomy journals are: Monthly Notices of the Royal Astronomical Society 5.23; Astrophysical Journal 5.58; and Astronomy and Astrophysics 6.21.