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NuSTAR Observations of Magnetar 1E 1048.1-5937
Yang, C.; Guillot, S.; Kaspi, V. M. +5 more
We report on simultaneous Nuclear Spectroscopic Telescope Array (NuSTAR) and XMM-Newton observations of the magnetar 1E 1048.1-5937, along with Rossi X-ray Timing Explorer (RXTE) data for the same source. The NuSTAR data provide a clear detection of this magnetar’s persistent emission up to 20 keV. We detect a previously unreported small secondary…
Testing Relativistic Reflection and Resolving Outflows in PG 1211+143 with XMM-Newton and NuSTAR
Vaughan, S.; Reeves, J. N.; Pounds, K. +1 more
We analyze the broad-band X-ray spectrum (0.3-50 keV) of the luminous Seyfert 1/quasar PG 1211+143—the archetypal source for high-velocity X-ray outflows—using near-simultaneous XMM-Newton and NuSTAR observations. We compare pure relativistic reflection models with a model including the strong imprint of photoionized emission and absorption from a…
Constraining White Dwarf Structure and Neutrino Physics in 47 Tucanae
Kalirai, J. S.; Heyl, J.; Tremblay, P. E. +2 more
We present a robust statistical analysis of the white dwarf cooling sequence in 47 Tucanae. We combine Hubble Space Telescope UV and optical data in the core of the cluster, Modules for Experiments in Stellar Evolution (MESA) white dwarf cooling models, white dwarf atmosphere models, artificial star tests, and a Markov Chain Monte Carlo sampling m…
A revised gyro-age for M67 from Kepler/K2-Campaign-5 light curves
Gonzalez, Guillermo
We revisit the photometric variability of stars in the M67 field using Kepler/K2-Campaign-5 light curves. In our previous work, we limited the search area around M67 to that of a recent ground-based study. In the present work, we expand the search area and apply a more rigorous period-finding algorithm to determine the rotation periods of 98 main-…
A database of synthetic photometry in the GALEX ultraviolet bands for the stellar sources observed with the International Ultraviolet Explorer
Beitia-Antero, Leire; Gómez de Castro, Ana I.
Context. The Galaxy Evolution Explorer (GALEX) has produced the largest photometric catalogue of ultraviolet (UV) sources. As such, it has defined the new standard bands for UV photometry: the near UV band (NUV) and the far UV band (FUV). However, due to brightness limits, the GALEX mission has avoided the Galactic plane which is crucial for astro…
No evidence for large-scale outflows in the extended ionized halo of ULIRG Mrk273
Tadhunter, C. N.; Rose, M.; Spoon, H. +4 more
We present deep new Gran Telescopio Canarias (GTC) narrow-band images and William Herschel Telescope (WHT) long-slit spectroscopy of the merging system Mrk273 that show a spectacular extended halo of warm ionized gas out to a radius of ∼45 kpc from the system nucleus. Outside of the immediate nuclear regions (r > 6 kpc), there is no evidence fo…
HELP*: star formation as a function of galaxy environment with Herschel†
Scott, D.; Sargent, M. T.; Buat, V. +15 more
The Herschel Extragalactic Legacy Project (HELP) brings together a vast range of data from many astronomical observatories. Its main focus is on the Herschel data, which maps dust-obscured star formation over 1300 deg2. With this unprecedented combination of data sets, it is possible to investigate how the star formation versus stellar …
Multi-wavelength Observations of a Subarcsecond Penumbral Transient Brightening Event
Su, J. T.; Cao, W. D.; Deng, Y. Y. +3 more
We report a subarcsecond penumbral transient brightening event with the high-spatial resolution observations from the 1.6 m New Solar Telescope (NST), Interface Region Imaging Spectrograph (IRIS), and the Solar Dynamics Observatory. The transient brightening, whose thermal energy is in the range of nanoflares, has signatures in the chromosphere, t…
Slipping reconnection in a solar flare observed in high resolution with the GREGOR solar telescope
Strassmeier, K. G.; Schmidt, W.; Solanki, S. K. +23 more
A small flare ribbon above a sunspot umbra in active region 12205 was observed on November 7, 2014, at 12:00 UT in the blue imaging channel of the 1.5 m GREGOR telescope, using a 1 Å Ca II H interference filter. Context observations from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO), the Solar Optical Telescop…
Analysis of the WN star WR 102c, its WR nebula, and the associated cluster of massive stars in the Sickle Nebula
Sander, A.; Hamann, W. -R.; Oskinova, L. M. +3 more
Context. The massive Wolf-Rayet type star WR 102c is located near the