Professor Christine Done's Outputs (5)

Strong constraints on a super-Eddington accretion flow: XMM–Newton observations of an intermediate-mass black hole (2015)
Journal Article
Jin, C., Done, C., & Ward, M. (2016). Strong constraints on a super-Eddington accretion flow: XMM–Newton observations of an intermediate-mass black hole. Monthly Notices of the Royal Astronomical Society, 455(1), 691-702. https://doi.org/10.1093/mnras/stv2319

RX J1140.1+0307 is a Narrow Line Seyfert 1 (NLS1) with one of the lowest black hole masses known in an AGN (M ≤ 106 M⊙). We show results from two new XMM–Newton observations, exhibiting soft 2–10 keV spectra, a strong excess at lower energies, and fa... Read More about Strong constraints on a super-Eddington accretion flow: XMM–Newton observations of an intermediate-mass black hole.

X-ray polarimetry with the Polarization Spectroscopic Telescope Array (PolSTAR) (2015)
Journal Article
Krawczynski, H., Stern, D., Harrison, F., Kislat, F., Zajczyk, A., Beilicke, M., …Zhang, W. (2016). X-ray polarimetry with the Polarization Spectroscopic Telescope Array (PolSTAR). Astroparticle Physics, 75, 8-28. https://doi.org/10.1016/j.astropartphys.2015.10.009

This paper describes the Polarization Spectroscopic Telescope Array (PolSTAR), a mission proposed to NASA’s 2014 Small Explorer (SMEX) announcement of opportunity. PolSTAR measures the linear polarization of 3–50 keV (requirement; goal: 2.5–70 keV) X... Read More about X-ray polarimetry with the Polarization Spectroscopic Telescope Array (PolSTAR).

The Accreting Black Hole Swift J1753.5-0127 from Radio to Hard X-Ray (2015)
Journal Article
Tomsick, J., Rahoui, F., Kolehmainen, M., Miller-Jones, J., Fürst, F., Yamaoka, K., …Urata, Y. (2015). The Accreting Black Hole Swift J1753.5-0127 from Radio to Hard X-Ray. Astrophysical Journal, 808(1), https://doi.org/10.1088/0004-637x/808/1/85

We report on multiwavelength measurements of the accreting black hole Swift J1753.5–0127 in the hard state at low luminosity (L ~ 2.7 × 1036 erg s−1 assuming a distance of d = 3 kpc) in 2014 April. The radio emission is optically thick synchrotron, p... Read More about The Accreting Black Hole Swift J1753.5-0127 from Radio to Hard X-Ray.

Reaching the peak of the quasar spectral energy distribution - I. Observations and models (2015)
Journal Article
Collinson, J., Ward, M., Done, C., Landt, H., Elvis, M., & McDowell, J. (2015). Reaching the peak of the quasar spectral energy distribution - I. Observations and models. Monthly Notices of the Royal Astronomical Society, 449(2), 2174-2193. https://doi.org/10.1093/mnras/stv362

We perform a spectral analysis of a sample of 11 medium redshift (1.5 ≲ z ≲ 2.2) quasars. Our sample all have optical spectra from the SDSS, infrared spectra from GNIRS and TripleSpec, and X-ray spectra from XMM–Newton. We first analyse the Balmer br... Read More about Reaching the peak of the quasar spectral energy distribution - I. Observations and models.

Complex narrow-line Seyfert 1s: high spin or high inclination? (2015)
Journal Article
Gardner, E., & Done, C. (2015). Complex narrow-line Seyfert 1s: high spin or high inclination?. Monthly Notices of the Royal Astronomical Society, 448(3), 2245-2259. https://doi.org/10.1093/mnras/stv168

Complex narrow-line Seyfert 1s (NLS1s), such as 1H 0707−495, differ from simple NLS1s like PG 1244+026 by showing stronger broad spectral features at Fe K and larger amplitude flux variability. These are correlated: the strongest Fe K features are se... Read More about Complex narrow-line Seyfert 1s: high spin or high inclination?.