Search Publications

Scanamorphos: A Map-making Software for Herschel and Similar Scanning Bolometer Arrays

Roussel, H.

Scanamorphos is one of the public softwares available to post-process scan observations performed with the Herschel photometer arrays. This post-processing mainly consists in subtracting the total low-frequency noise (both its thermal and non-thermal components), masking high-frequency artefacts such as cosmic ray hits, and projecting the data ont…

An Overview of the Dwarf Galaxy Survey

Poglitsch, A.; Sturm, E.; Ciesla, L. +38 more

The Dwarf Galaxy Survey (DGS) program is studying low-metallicity galaxies using 230 hr of far-infrared (FIR) and submillimetre (submm) photometric and spectroscopic observations of the Herschel Space Observatory and draws from this a rich database of a wide range of wavelengths tracing the dust, gas and stars. This sample of 50 galaxies includes …

GASPS—A Herschel Survey of Gas and Dust in Protoplanetary Disks: Summary and Initial Statistics

Pinte, C.; Dent, W. R. F.; Woitke, P. +47 more

We describe a large-scale far-infrared line and continuum survey of protoplanetary disk through to young debris disk systems carried out using the ACS instrument on the Herschel Space Observatory. This Open Time Key program, known as GASPS (Gas Survey of Protoplanetary Systems), targeted ~250 young stars in narrow wavelength regions covering the […

Data Reduction and Early Science Calibration for FORCAST, A Mid-Infrared Camera for SOFIA

Schoenwald, J.; Wang, J.; Vacca, W. D. +7 more

FORCAST is a mid-infrared (5-40 µm) facility instrument for the Stratospheric Observatory for Infrared Astronomy (SOFIA). After achieving first light flight in 2010 May, FORCAST has completed two observatory characterization flights and thirteen science flights on SOFIA. In this paper we describe the photometric calibration of FORCAST which …

PyGFit: A Tool for Extracting PSF Matched Photometry

Gonzalez, Anthony H.; Moustakas, Leonidas A.; Mancone, Conor L. +1 more

We present PyGFit, a program designed to measure PSF-matched photometry from images with disparate pixel scales and PSF sizes. While PyGFit has a number of uses, its primary purpose is to extract robust spectral energy distributions (SEDs) from crowded images. It does this by fitting blended sources in crowded, low resolution images with models ge…

Mg II h + k Flux—Rotational Period Correlation for G-type Stars

Bertone, Emanuele; Olmedo, Manuel; Chávez, Miguel +1 more

We present an analysis of the correlation between the mid-UV Mg II h and k emission lines and measured rotational periods of G-type stars. Based on IUE and HST high resolution spectra of a sample of 36 stars, we derive an exponential function that best represents the correlation. We found that the variation of the Mg II h + k fluxes is about a fac…

The Interstellar Sight-Line Towards the M33 Galaxy

Welsh, Barry Y.; Lallement, Rosine

Interstellar Dust Models Towards Some IUE Stars

Gupta, R.; Katyal, N.; Vaidya, D. B.

We study the extinction properties of the composite dust grains, consisting of host silicate spheroids and graphite as inclusions, using discrete dipole approximation (DDA). We calculate the extinction cross sections of the composite grains in the ultraviolet spectral region, 1200Å-3200Åand study the variation in extinction as a function of the vo…

A Combined Astrometric and Spectroscopic Study of Metal-Poor Binaries

Sozzetti, A.; Santos, N. C.; Latham, D. W. +1 more

In this work we present a study of binary systems in a metal-poor sample of solar type stars. The stars analyzed were rejected from two planet search samples because they were found to be binaries. Using available radial velocity and Hipparcos astrometric data, we apply different methods to find, for every binary system, a possible range of soluti…

Interstellar Absorption Lines in the Direction of the Cataclysmic Variable SS Cygni

Ritchey, Adam M.; Wallerstein, George; McKeever, Jean

Not Available

Based on observations obtained with the Apache Point Observatory 3.5 m telescope, which is owned and operated by the Astrophysical Research Consortium, and on observations made with the NASA/ESA Hubble Space Telescope, obtained from the Mikulski Archive for Space Telescopes. STScI is operated by the Association of Universities f…