2 citations · 2 across the 1 of their papers we have counts for
7 papers
Spectroscopic and Photometric Observations of SN IIn 1995N
A. Pastorello, I. Aretxaga, L. Zampieri +2
We present the results of a long-term program of monitoring of the famous SN 1995N, observed both in photometry (UBVRIJHK bands) and optical spectroscopy. The observations span a p…
When SN explode in a Starburst: Transitions among AGN types
I. Aretxaga
Among the Active Galactic Nuclei (AGN) that have suffered type mutations, the classically classified Seyfert 2 NGC 7582 recently found at a Seyfert 1 stage, is perhaps one of the m…
The hosts of QSOs
Itziar Aretxaga, Brian J. Boyle, Roberto J. Terlevich
We present results of the hosts of four high-redshift () and high luminosity ($M_B \lsim -28$ mag) QSOs, three radio-quiet one radio-loud, imaged in R and K bands. The…
AGN variability: from Seyfert nuclei to QSOs
Itziar Aretxaga
The continuum variability of optically selected Active Galactic Nuclei (AGN) is found to be consistent with that expected from a simple Poissonian process, in which the total lumin…
Galaxies at z=2: extensions around radio-quiet QSOs
I. Aretxaga, B. J. Boyle, R. J. Terlevich
We have been conducting an imaging survey to detect host galaxies of radio-quiet QSOs at high redshift (z = 2), in order to compare them with those of radio-loud objects. Six QSOs…
The host galaxies of z=2 radio-quiet QSOs
I. Aretxaga, B. J. Boyle, R. J. Terlevich
Based on an -band imaging survey of high-redshift () QSOs with the 4.2m WHT, we report the detection of extensions to the nuclear PSFs of two radio-quiet and one ra…