# Anisotropy of quasar distribution

In a paper titled

Arp, H. (1984). Distribution of quasars on the sky. Journal of Astrophysics and Astronomy, 5(1):31-41.

at Journal of Astrophysics and Astronomy, Halton Arp wrote that there is a notable clustering of quasars at $$21^h, and a marked lack of quasars at $$9^h, but I haven't been able to find other references to the same distribution. The paper was published in 1984, so has anyone else published a similar result, or has this observation been

• refuted, or

• explained?