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A remarkable long-term light curve, and deep, low-state spectroscopy: Swift & XMM-Newton monitoring of the NLS1 galaxy Mkn 335
remarkable long-term light curve low-state spectroscopy Swift XMM-Newton monitoring the NLS1 galaxy
2012/2/23
The Narrow-line Seyfert 1 galaxy (NLS1) Mkn 335 is remarkable because it has repeatedly shown deep, long X-ray low-states which show pronounced spectral structure. It has become one of the prototype A...
Astronomical Spectroscopy
Astronomical Spectroscopy Instrumentation and Methods for Astrophysics
2011/1/11
Spectroscopy is one of the most important tools that an astronomer has for studying the universe. This chapter begins by discussing the basics, including the different types of optical spectrographs, ...
Molecular environment and thermal X-ray spectroscopy of the semicircular young composite supernova remnant 3C 396
ISM individual (3C 396 G39.2− 0.3) – ISM molecules – supernova remnants
2010/11/15
We have investigated the molecular gas environment of the semicircular composite supernova rem-
nant (SNR) 3C 396 in multiwavelengths and performed a Chandra spatially resolved thermal X-ray
spectro...
Ultraviolet Coronagraph Spectroscopy: A Key Capability for Understanding the Physics of Solar Wind Acceleration
Ultraviolet Coronagraph Spectroscopy Physics of Solar Wind Acceleration
2010/11/15
Understanding the physical processes responsible for accelerating the solar wind requires detailed measurements of the collisionless plasma in the extended solar corona. Some key clues about these pro...
We present the results of spectroscopy of 71 objects with steep and ultra-steep spectra (α < −0.9, S / ν ) from the“Big Trio” (RATAN-600–VLA–BTA) project, performed with the “Scorpio” spectrogra...
Swift UVOT Grism Spectroscopy of Comets: A First Application to C/2007 N3 (Lulin)
Comets Individual Methods Data Analysis –Techniques Image Spectroscopy – Ultraviolet planetary systems
2010/11/11
We observed comet C/2007 N3 (Lulin) twice on UT 28 January 2009, using the UV grism of the Ultraviolet and Optical Telescope (UVOT) on board the Swift Gamma Ray Burst space observatory. Grism spectros...
A survey of diffuse interstellar bands in the Andromeda galaxy: optical spectroscopy of M31 OB stars
dust extinction – galaxies individual (M31) – galaxies ISM – ISM H ii regions – ISM
2010/11/10
We present the largest sample to-date of intermediate-resolution blue-to-red optical spectra of B-type supergiants in M31 and undertake the first survey of diffuse interstellar bands (DIBs) in this ga...
Gemini GMOS spectroscopy of HeII nebulae in M33
stars atmospheres — stars Wolf-Rayet — ISM HII regions — ISM lines and bands — galaxies individual (M33)—galaxies
2010/11/15
We have carried out a narrow-band survey of the Local Group galaxy, M33, in the HeII λ4686 emission line, to identify HeII nebulae in this galaxy. With spectroscopic follow-up observations, we confirm...
NICMOS transmission spectroscopy of HD 189733b: controversy becomes confirmation
techniques spectroscopic methods data analysis planets and satellites atmospheres planets and satellites composition
2010/11/10
Spectral features corresponding to methane and water opacity were reported based on spectroscopic observations of HD 189733b with Hubble/NICMOS. Recently,these data, and other NICMOS exoplanet spectro...
Chemical abundance ratios of galactic globular clusters from modelling integrated light spectroscopy
galactic globular clusters light spectroscopy
2011/1/10
We use our new, flux-calibrated stellar population model of absorption-line indices to derive ages, metallicities, and various element abundance ratios from integrated light spectroscopy of galactic g...
Comparison of AGN and Nuclear Starburst Activity in Seyfert 1 and 2 Galaxies over a Wide Luminosity Range Based on Near-infrared 2-4 micrometer Spectroscopy
Galaxy Astrophysics (astro-ph.GA)
2011/1/4
We present near-infrared K- (1.9-2.5 micrometer) and L- (2.8-4.2 micrometer) band spectroscopy of 22 Seyfert nuclei. We use two methods to investigate the presence of nuclear starbursts.
Gemini/GMOS Spectroscopy of 26 Strong Lensing Selected Galaxy Cluster Cores
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/4
We present results from a spectroscopic program targeting 26 strong lensing cluster cores that were visually identified in the Sloan Digital Sky Survey (SDSS) and the Second Red-Sequence Cluster Surve...
Chandra high resolution spectroscopy of the circumnuclear matter in the Broad Line Radio Galaxy 3C445
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/29
We present evidence for X-ray line emitting and absorbing gas in the nucleus of the Broad-Line Radio Galaxy (BLRG), 3C 445. A 200ks Chandra LETG observation of 3C 445 reveals the presence of several h...
A nearby GRB host prototype for z~7 Lyman-break galaxies: Spitzer-IRS and X-shooter spectroscopy of the host galaxy of GRB031203
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
Gamma-ray burst (GRB) host galaxies have been studied extensively in optical photometry and spectroscopy. Here we present the first mid-infrared spectrum of a GRB host, HG031203. It is one of the near...
A new look at NICMOS transmission spectroscopy of HD189733, GJ-436 and XO-1: no conclusive evidence for molecular features
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/28
We present a re-analysis of archival HST/NICMOS transmission spectroscopy of three exoplanet systems; HD 189733, GJ-436 and XO-1. Detections of several molecules, including H20, CH4 and CO2, have been...