Santos-Lleó, MaríaClavel, JeanSchulz, BernhardAltiéri, BrunoBarr, PaulAlloin, DanielleBerlind, P.Bertram, R.Crenshaw, D. M.Edelson, R. A.Giveon, U.Horne, K.Huchra, J. P.Kaspi, S.Kriss, G. A.Krolik, J. H.Malkan, M. A.Malkov, Yu. F.Netzer, H.O’Brien, P. T.Peterson, B. M.Pogge, R. W.Pronik, V. I.Qian, B. C.Reicher, G. A.Rodríguez-Pascual, P. M.Sergeev, S. G.Tao, J.Tokarz, S.Wagner, R. M.Wamsteker, W.Wilkes, B. J.2016-09-232016-09-232001Santos-Lleó, M., Clavel, J., Schulz, B., Altieri, B., Barr, P., Alloin, D., … Wilkes, B. J. (2001). Monitoring of the optical and 2.5-11.7 μm spectrum and mid-IR imaging of the Seyfert 1 galaxy Mrk 279 with ISO. Astronomy and Astrophysics, 369(1), 57-64. DOI: 10.1051/0004-6361:20010103.00046361http://hdl.handle.net/11268/5805Mid-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 μm 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 μm average spectrum of the nucleus in Mrk 279 shows a strong power law continuum with α = -0.80 ± 0.05 (F v ∝ v α) and weak PAH emission features. The Mrk 279 spectral energy distribution shows a mid-IR bump, which extends from 2 to 15-20 μm. The mid-IR bump is consistent with thermal emission from dust grains at a distance of ≳ 100 lt-d. 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 Hβ line emission in response to the optical continuum variations is τ = 16.7 -5.6 +5.3 days, consistent with previous measurements.engjournal article10.1051/0004-6361:20010103open accessAstrofísicaAstronomíaAstrofísicaAstronomía