Jet Directions in Seyfert Galaxies:
                    <i>B</i>
                    and
                    <i>I</i>
                    Imaging Data

Schmitt, Henrique R.; Kinney, A. L.

doi:10.1086/313397

Cited by 42 publications

(35 citation statements)

References 12 publications

(12 reference statements)

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“…Thus we discard the values from the second catalog. The mean of our values are also in general agreement with the photometric values, except for the case of the I photometry by Schmitt & Kinney (2000) who give a higher PA value than the rest. We adopt the mean values of the results of our two methods applied to the first and third catalog.…”

Section: Notes On Individual Galaxiessupporting

confidence: 88%

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Analysis of the distribution of HII regions in external galaxies

García-Gómez¹,

Athanassoula²,

Barberà³

2002

A&A

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Abstract.We have compiled a new sample of galaxies with published catalogs of HII region coordinates. This sample, together with the former catalog of García-Gómez & Athanassoula (1991), will form the basis for subsequent studies of the spiral structure in disc galaxies. In this paper we address the problem of the deprojection of the galaxy images. For this purpose we use two deprojection methods based on the HII region distribution and compare the results with the values found in the literature using other deprojection methods. Taking into account the results of all the methods, we propose optimum values for the position and inclination angles of all the galaxies in our sample.

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Section: Notes On Individual Galaxiessupporting

confidence: 88%

“…Our two methods do not work properly because they try to circularize the ring. We adopt the deprojection angles obtained in the photometric study of Schmitt & Kinney (2000).…”

Section: Notes On Individual Galaxiesmentioning

confidence: 99%

Analysis of the distribution of HII regions in external galaxies

García-Gómez¹,

Athanassoula²,

Barberà³

2002

A&A

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“…MCG−1−24−12 has an optical magnitude of m v = 15 and it is in the 2MASS catalogue (m J = 14.2, m H = 13.3, m K = 12.8); it belongs to the 60 µm sample of warm IRAS galaxies (de Grijp et al 1992;Kinney et al 2000) with a log (L FIR ) = 10.01 L (Chatzichristou 2000). It is also a radio galaxy with a F 3.6 cm = 9.1 mJy and its 3.6 cm radio contours show a ∼70 pc elongation towards the west (Schmitt et al 2001), but it was never observed in the X-ray band. After finding MCG−1−24−12 as the possible candidate, we were able to obtain a pointed observation with BeppoSAX and found that its 2-10 keV flux of ∼1 × 10 −11 erg cm −2 s −1 is more consistent with that reported in the original Piccinotti source list (Piccinotti et al 1982) than that observed from EXO0917.3−0722.…”

Section: Observations: From Exo09173−0722 To Mcg−1−24−12mentioning

confidence: 93%

BeppoSAX/PDS identification of the true counterpart of the Piccinotti source H0917-074

Malizia¹,

Malaguti²,

Bassani³

et al. 2002

A&A

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Abstract. High energy emission has been discovered serendipitously by the BeppoSAX/PDS telescope in the ∼1.3• field of view around the Piccinotti source H0917-074. A re-pointing of BeppoSAX/NFI has allowed the association of this emission with the Seyfert 2 galaxy MCG−1−24−12 which lies within the original HEAO1/A2 error box of H0917-074. This is the first PDS serendipitous discovery of a Seyfert 2 galaxy and the first detection of MCG−1−24−12 in the X-ray domain. The measured 2-10 keV flux of MCG−1−24−12 is ∼1 × 10 −11 erg cm −2 s −1 compatible with the Piccinotti HEAO-1/A2 observation. This is a factor of ∼6 greater than that observed from EXO0917.3-0722, originally suggested as the counterpart of the Piccinotti source. The 2-10 keV spectrum of MCG−1−24−12 shows the presence of Fe K α emission together with an absorption feature at ∼8.7 keV. At high energies, the Seyfert 2 still dominates and the observed 20-100 keV flux is ∼4 × 10 −11 erg cm −2 s −1 .

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“…In addition to the RGS spectra we also investigate the nature of the host galaxy using archive B-band and I-band images, from 1.2 ks exposures in November 1998 with the 1 m Nickel Telescope at the Lick Observatory (Schmitt & Kinney 2000), and combined UV images, from the XMM-Newton Optical Monitor (XMM-OM, Mason et al 2001) taken simultaneously with the RGS observations mentioned above. The pipeline processed XMM-OM UV sky-images in each filter were aligned and then coadded to produce the image of Arakelian 564 for each of the UVW1 (220−400 nm), UWM2 (200−280 nm) and UVW2 (180−260 nm) filters.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

Exploring the nuclear environment of the NLS1 galaxy Arakelian 564 with XMM-Newton RGS

Smith¹,

Page²,

Branduardi‐Raymont³

2008

A&A

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Aims. We present an accurate characterisation of the high-resolution X-ray spectrum of the Narrow Line Seyfert 1 galaxy Arakelian 564 and put it in to context with other objects of its type by making a detailed comparison of their spectra. Methods. The data are taken from 5 observations with the XMM-Newton Reflection Grating Spectrometer and fitted with various spectral models. Results. The best fit to the data identifies five significant emission lines at 18.9, 22.1, 24.7, 29.0 and 33.5 Å due to O VIII Lyα, O VII(f), N VII Lyα, N VI(i) and C VI Lyα respectively. These have an RMS velocity of ∼1100 km s −1 and a flow velocity of ∼−600 km s −1 , except for the O VII(f) emission line, which has a flow velocity consistent with zero. Two separate emitting regions are identified. Three separate phases of photoionized, X-ray absorbing gas are included in the fit with ionization parameters log ξ = −0.86, 0.87, 2.56 and column densities N H = 0.89, 2.41, 6.03 × 10 20 cm −2 respectively. All three phases show this to be an unusually low velocity outflow (−10 ± 100 km s −1 ) for a narrow line Seyfert 1. We present the hypothesis that the BLR is the source of the NLR and warm absorber, and examine optical and UV images from the XMM-Newton Optical Monitor to relate our findings to the characteristics of the host galaxy.

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Jet Directions in Seyfert Galaxies: B and I Imaging Data

Cited by 42 publications

References 12 publications

Analysis of the distribution of HII regions in external galaxies

Analysis of the distribution of HII regions in external galaxies

BeppoSAX/PDS identification of the true counterpart of the Piccinotti source H0917-074

Exploring the nuclear environment of the NLS1 galaxy Arakelian 564 with XMM-Newton RGS

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