Monitoring of the optical and 2.5-11.7 micron spectrum and mid-IR imaging of the Seyfert 1 galaxy Mrk279 with ISO

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dc.creatorThe AGN Watch collaboration
dc.creatorSantos-Lleo, M.
dc.creatorClavel, J.
dc.creatorSchulz, B.
dc.creatorAltieri, B.
dc.creatorBarr, P.
dc.creatorAlloin, D.
dc.creatorBerlind, P.
dc.creatorBertram, R.
dc.creatorCrenshaw, D. M.
dc.creatorEdelson, R. A.
dc.creatorGiveon, U.
dc.creatorHorne, K.
dc.creatorHuchra, J. P.
dc.creatorKaspi, S.
dc.creatorKriss, G. A.
dc.creatorKrolik, J. H.
dc.creatorMalkan, M. A.
dc.creatorMalkov, Yu. F.
dc.creatorNetzer, H.
dc.creatorO'Brien, P. T.
dc.creatorPeterson, B. M.
dc.date2001-02-21
dc.date.accessioned2026-07-25T11:31:19Z
dc.descriptionMid-infrared images of the Seyfert 1 galaxy Mrk 279 obtained with the ISO satellite are presented together with the results of a one-year monitoring campaign of the 2.5-11.7 micron spectrum. Contemporaneous optical photometric and spectrophotometric observations are also presented. The galaxy appears as a point-like source at the resolution of the ISOCAM instrument, 4-5". The 2.5-11.7 micron average spectrum of the nucleus in Mrk 279 shows a strong power law continuum with a spectral index alpha = -0.80+/-0.05 and weak PAH emission features. The Mrk 279 spectral energy distribution shows a mid-IR bump, which extends from 2 to 15-20 micron . The mid-IR bump is consistent with thermal emission from dust grains at a distance of >= 100 light-days. No significant variations of the mid-IR flux have been detected during our observing campaign, consistent with the relatively low amplitude (~10 % rms) of the optical variability during the campaign. The time delay for the Hbeta line emission in response to the optical continuum variations is 16.7 +5.3/5.6 days, consistent with previous measurements.
dc.descriptionIn press in Astronomy and Astrophysics (main journal) 12 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0102356
dc.identifierhttp://arxiv.org/abs/astro-ph/0102356
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/3375
dc.subjectAstrophysics
dc.titleMonitoring of the optical and 2.5-11.7 micron spectrum and mid-IR imaging of the Seyfert 1 galaxy Mrk279 with ISO
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