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The Intermediate Luminosity Optical Transient SN 2010da: The Progenitor, Eruption, and Aftermath of a Peculiar Supergiant High-mass X-Ray Binary
Berger, E.; Brown, P. J.; Chornock, R. +7 more
We present optical spectroscopy, ultraviolet-to-infrared imaging, and X-ray observations of the intermediate luminosity optical transient (ILOT) SN 2010da in NGC 300 (d = 1.86 Mpc) spanning from -6 to +6 years relative to the time of outburst in 2010. Based on the light-curve and multi-epoch spectral energy distributions of SN 2010da, we conclude …
Magnetic Field in Atypical Prominence Structures: Bubble, Tornado, and Eruption
Schmieder, B.; Labrosse, N.; Dalmasse, K. +3 more
Spectropolarimetric observations of prominences have been obtained with the THEMIS telescope during four years of coordinated campaigns. Our aim is now to understand the conditions of the cool plasma and magnetism in “atypical” prominences, namely when the measured inclination of the magnetic field departs, to some extent, from the predominantly h…
Ages of Massive Galaxies at 0.5 > z > 2.0 from 3D-HST Rest-frame Optical Spectroscopy
Franx, Marijn; Labbé, Ivo; van Dokkum, Pieter +10 more
We present low-resolution near-infrared stacked spectra from the 3D-HST survey up to z = 2.0 and fit them with commonly used stellar population synthesis models: BC03, FSPS10 (Flexible Stellar Population Synthesis), and FSPS-C3K. The accuracy of the grism redshifts allows the unambiguous detection of many emission and absorption features and thus …
Transition-region/Coronal Signatures and Magnetic Setting of Sunspot Penumbral Jets: Hinode (SOT/FG), Hi-C, and SDO/AIA Observations
Tiwari, Sanjiv K.; Winebarger, Amy R.; Moore, Ronald L. +1 more
Penumbral microjets (PJs) are transient narrow bright features in the chromosphere of sunspot penumbrae, first characterized by Katsukawa et al. using the Ca II H-line filter on Hinode's Solar Optical Telescope (SOT). It was proposed that the PJs form as a result of reconnection between two magnetic components of penumbrae (spines and interspines)…
ASASSN-15lh: A Superluminous Ultraviolet Rebrightening Observed by Swift and Hubble
Baade, Dietrich; Wang, Lifan; Wheeler, J. Craig +9 more
We present and discuss ultraviolet and optical photometry from the Ultraviolet/Optical Telescope, X-ray limits from the X-Ray Telescope on Swift, and imaging polarimetry and ultraviolet/optical spectroscopy with the Hubble Space Telescope, all from observations of ASASSN-15lh. It has been classified as a hydrogen-poor superluminous supernova (SLSN…
HST Grism Confirmation of Two z ∼ 2 Structures from the Clusters around Radio-loud AGN (CARLA) Survey
Noirot, Gaël; Gonzalez, Anthony H.; Stern, Daniel +10 more
Using Hubble Space Telescope slitless grism data, we report the spectroscopic confirmation of two distant structures at z∼ 2 associated with powerful high-redshift radio-loud active galactic nuclei (AGNs). These rich structures, likely (forming) clusters, are among the most distant structures currently known, and were identified on the basis of Sp…
Submillimeter Polarization Spectrum in the Vela C Molecular Cloud
Ward-Thompson, Derek; Fissel, Laura M.; Nakamura, Fumitaka +27 more
Polarization maps of the Vela C molecular cloud were obtained at 250, 350, and 500 µm during the 2012 flight of the balloon-borne telescope BLASTPol. These measurements are used in conjunction with 850 µm data from Planck to study the submillimeter spectrum of the polarization fraction for this cloud. The spectrum is relatively flat an…
The Possible Detection of a Binary Companion to a Type Ibn Supernova Progenitor
Maund, J. R.; Mattila, S.; Pastorello, A. +2 more
We present late-time observations of the site of the Type Ibn supernova (SN) 2006jc, acquired with the Hubble Space Telescope Advanced Camera for Surveys. A faint blue source is recovered at the SN position, with brightness {m}F435W=26.76+/- 0.20, {m}F555W=26.60+/- 0.23 and {m}F625W=26.32+/- 0.19 mag, although ther…
The Nature and Frequency of the Gas Outbursts in Comet 67P/Churyumov-Gerasimenko Observed by the Alice Far-ultraviolet Spectrograph on Rosetta
Parker, Joel Wm.; Bertaux, Jean-Loup; Stern, S. Alan +7 more
Alice is a far-ultraviolet imaging spectrograph on board Rosetta that, among multiple objectives, is designed to observe emissions from various atomic and molecular species from within the coma of comet 67P/Churyumov-Gerasimenko. The initial observations, made following orbit insertion in 2014 August, showed emissions of atomic hydrogen and oxygen…
Discovery of Broad Soft X-ray Absorption Lines from the Quasar Wind in PDS 456
Behar, E.; Turner, T. J.; Tombesi, F. +5 more
High-resolution soft X-ray spectroscopy of the prototype accretion disk wind quasar, PDS 456, is presented. Here, the XMM-Newton reflection grating spectrometer spectra are analyzed from the large 2013-2014 XMM-Newton campaign, consisting of five observations of approximately 100 ks in length. During the last observation (OBS. E), the quasar is at…