Results 181 to 190 of about 160,296 (274)

AGN STORM 2. VIII. Investigating the Narrow Absorption Lines in Mrk 817 Using HST-COS Observations

The Astrophysical Journal
We observed the Seyfert 1 galaxy Mrk 817 during an intensive multiwavelength reverberation mapping campaign for 16 months. Here, we examine the behavior of narrow UV absorption lines seen in the Hubble Space Telescope/Cosmic Origins Spectrograph spectra,
Maryam Dehghanian, Nahum Arav, Gerard A. Kriss, Missagh Mehdipour, Doyee Byun, Gwen Walker, Mayank Sharma, Aaron J. Barth, Misty C. Bentz, Benjamin D. Boizelle, Michael S. Brotherton, Edward M. Cackett, Elena Dalla Bontà, Gisella De Rosa, Gary J. Ferland, Carina Fian, Alexei V. Filippenko, Jonathan Gelbord, Michael R. Goad, Keith Horne, Yasaman Homayouni, Dragana Ilić, Michael D. Joner, Erin A. Kara, Shai Kaspi, Christopher S. Kochanek, Kirk T. Korista, Peter Kosec, Andjelka B. Kovačević, Hermine Landt, Collin Lewin, Ethan R. Partington, Luka Č. Popović, Daniel Proga, Daniele Rogantini, Matthew R. Siebert, Thaisa Storchi-Bergmann, Marianne Vestergaard, Timothy. Waters, Jian-Min Wang, Fatima Zaidouni, Ying Zu   +41 more
doaj   +1 more source

Proceedings of the Conference on Seyfert Galaxies and Related Objects: 2. A Comparison of the Optical Forms of Certain Seyfert Galaxies with the N-Type Radio Galaxies

, 1968
W. W. Morgan
openalex   +1 more source

Far-infrared properties of optically-selected quasars and Seyfert galaxies [PDF]

Pointed IRAS observations and ground based observations are used to determine the infrared properties of optically selected galaxies and quasars. The use of complete, unbiased, optically selected samples means that statistical tests can be applied to ...
Edelson, R. A., Malkan, M. A.
core   +1 more source

Proceedings of the Conference on Seyfert Galaxies and Related Objects: 10. on intenstes in Seyfert Galaxies and Quasistellar Objects

, 1968
E. J. Wampler
openalex   +1 more source

Extragalactic radio surveys in the pre-Square Kilometre Array era. [PDF]

R Soc Open Sci, 2017
Simpson C.
europepmc   +1 more source

Proceedings of the Conference on Seyfert Galaxies and Related Objects: 24. Photometric Anomalies in the Nuclei of Galaxies

, 1968
W. G. Tifft
openalex   +1 more source

Discovery of a very Lyman-α-luminous quasar at z = 6.62. [PDF]

Sci Rep, 2017
Koptelova E, Hwang CY, Yu PC, Chen WP, Guo JK.   +4 more
europepmc   +1 more source

Observations of NGC 6764, a barred Seyfert galaxy

, 1975
Vera Rubin, N. Thonnard, Jr. Ford W. K.
openalex   +1 more source

The polarization of Seyfert galaxies

The Astrophysical Journal, 1983
Ian B. Thompson, James Roger P. Angel, Peter G. Martin, José Maza   +3 more
openaire   +2 more sources

SiO and CH3OH mega-masers in NGC 1068. [PDF]

Nat Commun, 2014
Wang J, Zhang J, Gao Y, Zhang ZY, Li D, Fang M, Shi Y.   +6 more
europepmc   +1 more source