Circumnuclear Dust in AP Librae and the source of its VHE emission

This paper is based on observations made with the NASA/ESA Hubble Space Telescope obtained from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5–26555. This work was supported by the HST-GO grant 15175. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2017.1.01411.T, 2017.1.00568, 2017.1.00995, 2017.1.00258, 2017.1.01583, 2017.1.00963, 2017.A.00047, 2017.1.00239, 2013.1.00244, 2017.1.01555, 2017.A.00047, 2017.1.00337, 2017.1.00023, 2017.1.01555. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc