Results 11 to 20 of about 138,479 (95)

Laser frequency comb techniques for precise astronomical spectroscopy [PDF]

, 2012
Precise astronomical spectroscopic analyses routinely assume that individual pixels in charge-coupled devices (CCDs) have uniform sensitivity to photons.
Andre N. Luiten, Bahcall, Benabid, Benedick, Clayton R. Locke, Cundiff, Dekker, Diego, Fisher, Ivanchik, Jon S. Lawrence, Jones, King, Liske, Locke, Loeb, Lovis, Ma, Malec, Marcy, Mayor, Michael T. Murphy, Murphy, Murphy, Pasquini, Philip S. Light, Press, Reichert, Sandage, Schmidt, Steinmetz, Tinney, Toyozumi, Udem, Varshalovich, Webb, Webb, Wilken   +37 more
core   +2 more sources

Rotational Spectroscopy of PAHs: Acenaphthene, Acenaphthylene and Fluorene [PDF]

, 2005
Pure rotational spectra of three polycyclic aromatic hydrocarbons - acenaphthene, acenaphthylene and fluorene - have been obtained by Fourier transform microwave spectroscopy of a molecular beam and subsequently by millimeter wave absorption spectroscopy
Gottlieb, C. A., McCarthy, M. C., Thaddeus, P., Theule, P., Thorwirth, S.   +4 more
core   +2 more sources

Trend filtering – I. A modern statistical tool for time-domain astronomy and astronomical spectroscopy [PDF]

Trend filtering -- I. A modern statistical tool for time-domain astronomy and astronomical spectroscopy, Monthly Notices of the Royal Astronomical Society, Volume 492, Issue 3, March 2020, Pages 4005 - 4018, 2020
The problem of denoising a one-dimensional signal possessing varying degrees of smoothness is ubiquitous in time-domain astronomy and astronomical spectroscopy. For example, in the time domain, an astronomical object may exhibit a smoothly varying intensity that is occasionally interrupted by abrupt dips or spikes.
Collin A. Politsch, Jessi Cisewski-Kehe, Rupert A. C. Croft, Larry Wasserman   +3 more
openalex   +2 more sources

High-resolution millimeter-wave spectroscopy of CH2DCl: Paving the way for future astronomical observations of chloromethane isotopologues [PDF]

Journal of Quantitative Spectroscopy and Radiative Transfer, Volume 248, June 2020, 106982, 2020
Chloromethane is the only organochloride detected in space to date. Its recent observation towards the low-mass protostar IRAS 16293-2422 with ALMA offers a prompt for new laboratory studies of CH$_3$Cl and its isotopologues. Here, we report the investigation of the rotational spectrum of monodeuterated chloromethane CH$_2$DCl in the frequency region ...
Mattia Melosso, Andrè Achilli, Filippo Tamassia, Elisabetta Canè, Andrea Pietropolli Charmet, Paolo Stoppa, Luca Dore   +6 more
openalex   +2 more sources

Astronomical imaging Fourier spectroscopy at far-infrared wavelengths [PDF]

Canadian Journal of Physics, 91, 11, p. 870-878 (Nov 2013), 2013
The principles and practice of astronomical imaging Fourier transform spectroscopy (FTS) at far-infrared wavelengths are described. The Mach-Zehnder interferometer design has been widely adopted for current and future imaging FTS instruments; we compare this design with two other common interferometer formats. Examples of three instruments based on the
David A. Naylor, Brad G. Gom, M. H. D. van der Wiel, Gibion Makiwa   +3 more
openalex   +2 more sources

The diffuse interstellar bands: A major problem in astronomical spectroscopy [PDF]

J.Molec.Spectrosc. 238 (2006) 1-10, 2006
A critical review of the very long-standing problem of the diffuse interstellar bands is presented with emphasis on spectroscopic aspects of observational, modelling and laboratory-based research. Some research themes and ideas that could be explored theoretically and experimentally are discussed.
P. J. Sarre
openalex   +2 more sources

Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides [PDF]

Nat Commun 15, 7614 (2024), 2023
Astronomical precision spectroscopy underpins searches for life beyond Earth, direct observation of the expanding Universe and constraining the potential variability of physical constants across cosmological scales. Laser frequency combs can provide the critically required accurate and precise calibration to the astronomical spectrographs.
arxiv   +1 more source

The SCORPIO focal reducer [PDF]

Astron.Lett. 31 (2005) 193, 2005
We describe the SCORPIO focal reducer that has been used since the fall of 2000 for observations on the 6-m Special Astrophysical Observatory telescope. We give parameters of the instrument in various observing modes (direct images, long-slit and multislit spectroscopy, spectropolarimetry, Fabry-Perot panoramic spectroscopy).
arxiv   +1 more source

What microwave astronomical spectroscopy can tell you about the carriers of the DIBS [PDF]

, 2014
Astronomical microwave spectroscopy has greatly broadened the inventory of identifiable chemical species in diffuse molecular gas and is an increasingly effective way to measure the abundances of polar molecules that may be candidate diffuse interstellar band carriers. Here we review some recent developments that hold new promise for chemical abundance
arxiv   +1 more source

The Integral Field View of the Orion Nebula [PDF]

, 2014
This paper reviews the major advances achieved in the Orion Nebula through the use of integral field spectroscopy (IFS). Since the early work of Vasconcelos and collaborators in 2005, this technique has facilitated the investigation of global properties ...
Mesa-Delgado, Adal
core   +3 more sources