Multiwavelength campaign on Mrk 509

II. Analysis of high-quality Reflection Grating Spectrometer spectra

¹ SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
e-mail: j.s.kaastra@stron.nl
² Sterrenkundig Instituut, Universiteit Utrecht, PO Box 80000, 3508 TA Utrecht, The Netherlands
³ Instituto de Astronomía, Universidad Católica del Norte, Avenida Angamos 0610, Casilla 1280, Antofagasta, Chile
⁴ Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UK
⁵ Department of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel
⁶ Dipartimento di Fisica, Università degli Studi Roma Tre, via della Vasca Navale 84, 00146 Roma, Italy
⁷ Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
⁸ Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA
⁹ Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK
¹⁰ ISDC Data Centre for Astrophysics, Astronomical Observatory of the University of Geneva, 16 ch. d’Ecogia, 1290 Versoix, Switzerland
¹¹ UJF-Grenoble 1 / CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG), UMR 5274, Grenoble 38041, France
¹² School of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, UK

Received: 11 March 2011
Accepted: 11 July 2011

Abstract

Aims. We study the bright Seyfert 1 galaxy Mrk 509 with the Reflection Grating Spectrometers (RGS) of XMM-Newton, using for the first time the RGS multi-pointing mode of XMM-Newton to constrain the properties of the outflow in this object. We obtain very accurate spectral properties from a 600 ks spectrogram of Mrk 509 with excellent quality.

Methods. We derive an accurate relative calibration for the effective area of the RGS and an accurate absolute wavelength calibration. We improve the method for adding time-dependent spectra and enhance the efficiency of the spectral fitting by two orders of magnitude.

Results. Taking advantage of the spectral data quality when using the new RGS multi-pointing mode of XMM-Newton, we show that the two velocity troughs previously observed in UV spectra are resolved.