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Space Telescope and Optical Reverberation Mapping Project. XII. Broad-Line Region Modeling of NGC 5548
P. R. Williams, A. Pancoast, T. Treu +155
We present geometric and dynamical modeling of the broad line region for the multi-wavelength reverberation mapping campaign focused on NGC 5548 in 2014. The dataset includes photo…
Intensive disc-reverberation mapping of Fairall 9: 1st year of Swift & LCO monitoring
J. V. Hernández Santisteban, R. Edelson, K. Horne +33
We present results of time-series analysis of the first year of the Fairall 9 intensive disc-reverberation campaign. We used Swift and the Las Cumbres Observatory global telescope…
Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548
Keith Horne, G. De Rosa, B. M. Peterson +155
We report velocity-delay maps for prominent broad emission lines, Ly_alpha, CIV, HeII and H_beta, in the spectrum of NGC5548. The emission-line responses inhabit the interior of a…
Hubble Space Telescope Proper Motions of Individual Stars in Stellar Streams: Orphan, Sagittarius, Lethe, and the New "Parallel" Stream
Sangmo Tony Sohn, Roeland P. van der Marel, Nitya Kallivayalil +6
We present a multi-epoch Hubble Space Telescope (HST) study of stellar proper motions (PMs) for four fields along the Orphan Stream. We determine absolute PMs of several individual…
Swift Ultraviolet Survey of the Magellanic Clouds (SUMaC). I. Shape of the Ultraviolet Dust Extinction Law and Recent Star Formation History of the Small Magellanic Cloud
Lea M. Z. Hagen, Michael H. Siegel, Erik A. Hoversten +3
We present the first results from the Swift Ultraviolet Survey of the Magellanic Clouds (SUMaC), the highest resolution ultraviolet (UV) survey of the Magellanic Clouds yet complet…
The Evolution of the Far-UV Luminosity Function and Star Formation Rate Density of the Chandra Deep Field South from z=0.2-1.2 with Swift/UVOT
Lea M. Z. Hagen, Erik A. Hoversten, Caryl Gronwall +4
We use deep Swift UV/Optical Telescope (UVOT) near-ultraviolet (1600A to 4000A) imaging of the Chandra Deep Field South to measure the rest-frame far-UV (FUV; 1500A) luminosity fun…
UVOT Measurements of Dust and Star Formation in the SMC and M33
Lea M. Z. Hagen, Michael H. Siegel, Caryl A. Gronwall +3
When measuring star formation rates using ultraviolet light, correcting for dust extinction is a critical step. However, with the variety of dust extinction curves to choose from,…
Swift, UVOT and Hot Stars
Michael H. Siegel, Caryl A. Gronwall, Lea M. Z. Hagen +1
We present the results of our ongoing investigation into the properties of hot stars and young stellar populations using the Swift/UVOT telescope. We present UVOT photometry of ope…
Hubble Space Telescope Proper Motions along the Sagittarius Stream: I. Observations and Results for Stars in Four Fields
Sangmo Tony Sohn, Roeland P. van der Marel, Jeffrey L. Carlin +5
We present a multi-epoch Hubble Space Telescope (HST) study of stellar proper motions (PMs) for four fields spanning 200 degrees along the Sagittarius (Sgr) stream: one trailing ar…
The ACS Survey of Galactic Globular Clusters XI: The Three-Dimensional Orientation of the Sagittarius Dwarf Spheroidal Galaxy and its Globular Clusters
Michael H. Siegel, Steven R. Majewski, David R. Law +13
We use observations from the ACS study of Galactic globular clusters to investigate the spatial distribution of the inner regions of the disrupting Sagittarius dwarf spheroidal gal…
Light-Element Abundance Variations at Low Metallicity: the Globular Cluster NGC 5466
Matthew Shetrone, Sarah L. Martell, Rachel Wilkerson +4
We present low-resolution (R~850) spectra for 67 asymptotic giant branch (AGB), horizontal branch and red giant branch (RGB) stars in the low-metallicity globular cluster NGC 5466,…
Metallicities and ages of stellar populations at a high Galactic latitude field
Michael H. Siegel, Yuksel Karatas, I. Neill Reid
We present an analysis of data from the Selected Area SA 141. By applying recalibrated methods of measuring ultraviolet excess (UVX), we approximate abundances and absolute…