activity
20032023
most citedA spectroscopic survey on the multiplicity of high-mass stars

358 citations · 2.2k across the 82 of their papers we have counts for

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Showing astro-ph.COShow all

8 papers · 1 filter

astro-ph.CO2013★ 24 cited

Modelling photometric reverberation data -- a disk-like broad-line region and a potentially larger black hole mass for 3C120

F. Pozo Nuñez, M. Haas, M. Ramolla +7

We consider photometric reverberation mapping, where the nuclear continuum variations are monitored via a broad-band filter and the echo of emission line clouds of the broad line r…

astro-ph.CO2013★ 76 cited

Revealing the heavily obscured AGN population of High Redshift 3CRR Sources with Chandra X-ray Observations

Belinda J. Wilkes, Joanna Kuraszkiewicz, Martin Haas +12

Chandra observations of a complete, flux-limited sample of 38 high-redshift (1<z<2), low-frequency selected (and so unbiased in orientation) 3CRR radio sources are reported. The sa…

astro-ph.CO2013★ 30 cited

Size and disk-like shape of the broad-line region of ESO399-IG20

F. Pozo Nuñez, C. Westhues, M. Ramolla +6

We present photometric reverberation mapping of the narrow-line Seyfert 1 galaxy ESO399-IG20 performed with the robotic 15 cm telescope VYSOS-6 at the Cerro Armazones Observatory.…

astro-ph.CO2013★ 52 cited

Photometric reverberation mapping of 3C120

F. Pozo Nuñez, M. Ramolla, C. Westhues +5

We present the results of a five month monitoring campaign of the local active galactic nuclei (AGN) 3C120. Observations with a median sampling of two days were conducted with the…

astro-ph.CO2011★ 101 cited

Photometric AGN reverberation mapping - an efficient tool for BLR sizes, black hole masses and host-subtracted AGN luminosities

M. Haas, R. Chini, M. Ramolla +5

Photometric reverberation mapping employs a wide bandpass to measure the AGN continuum variations and a suitable band, usually a narrow band (NB), to trace the echo of an emission…

astro-ph.CO2011★ 11 cited

Megamaser detection and nuclear obscuration in Seyfert galaxies

Michael Ramolla, Martin Haas, Vardha Nicola Bennert +1

We revisit the relation between H2O maser detection rate and nuclear obscuration for a sample of 114 Seyfert galaxies, drawn from the CfA, 12um and IRAS F25/F60 catalogs. These sou…