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22031. The Southern H-Alpha Sky Survey Atlas: Continuum
ID:
ivo://nasa.heasarc/skyview/shassa
Title:
The Southern H-Alpha Sky Survey Atlas: Continuum
Short Name:
SHASSA
Date:
28 Feb 2025
Publisher:
NASA/GSFC HEASARC
Description:
The Southern H-Alpha Sky Survey Atlas is the product of a wide-angle digital imaging survey of the H-alpha emission from the warm ionized interstellar gas of our Galaxy. This atlas covers the southern hemisphere sky (declinations less than +15 degrees). The observations were taken with a robotic camera operating at Cerro Tololo Inter-American Observatory (CTIO) in Chile. The atlas consists of 2168 images covering 542 fields. There are four images available for each field: <b>H-alpha</b>, <b>Continuum</b>, <b>Continuum-Corrected</b> (the difference of the H-alpha and Continuum images), and <b>Smoothed</b> (median filtered to 5 pixel, or 4.0 arcminute, resolution to remove star residuals better). The <a href="https://amundsen.swarthmore.edu/SHASSA">SHASSA website</a> has more details of the data and the status of this and related projects. Images can also be obtained from the <a href="https://amundsen.astro.swarthmore.edu/SHASSA/#Images">Download Images</a> section at the SHASSA site. Provenance: John E. Gaustad (Swarthmore College), Peter R. McCullough (University of Illinois), Wayne Rosing (Las Cumbres Observatory), and Dave Van Buren (Extrasolar Research Corporation). This is a service of NASA HEASARC.
22032. The Southern SHARC catalogue
ID:
ivo://CDS.VizieR/J/MNRAS/341/1093
Title:
The Southern SHARC catalogue
Short Name:
J/MNRAS/341/1093
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Southern Serendipitous High-redshift Archival Cluster (SHARC) catalogue is a X-ray selected catalogue of galaxy clusters detected in deep ROSAT observations. The survey area is 17.7deg^2^ and is selected from long (greater than 10ks) ROSAT exposures with a declination <+20deg and excluding the Galactic plane (excluding galactic latitudes within the range [-20,20]deg). Optical follow-up was performed to confirm the presence of a galaxy cluster and measure its redshift. The final catalogue contains 32 galaxy clusters with redshifts between 0.05 and 0.70 and X-ray luminosities between 7x10^35^W and 4x10^37^W. Above a redshift of 0.3 - which forms the primary subsample of the survey - there are 16 clusters; the X-ray luminosities of these clusters are all greater than 2x10^36 W. All X-ray luminosities are quoted in the 0.5-2.0keV band and were calculated using an Einstein-de Sitter cosmology with H_0_ set to 50km/s/Mpc.
22033. The spectrum and term analysis of V II
ID:
ivo://CDS.VizieR/J/ApJS/207/13
Title:
The spectrum and term analysis of V II
Short Name:
J/ApJS/207/13
Date:
21 Oct 2021
Publisher:
CDS
Description:
The spectrum and extended term analysis of V II are presented. Fourier transform spectrometry was used to record high resolution spectra of singly ionized vanadium in the region 1492-5800 {AA} (67020-17260/cm) with vanadium-neon and vanadium-argon hollow cathode lamps as sources. The wavenumber uncertainty for the center of gravity of the strongest lines is typically 0.002/cm, an improvement of an order of magnitude over previous measurements. Most of the lines exhibit partly resolved hyperfine structure. The V II energy levels in the 1985 compilation of Sugar and Corliss have been confirmed and revised, with the exception of the high-lying 4f levels and eight of the lower levels. Thirty-nine of the additional eighty-five high levels published by Iglesias et al. (1988, Publicaciones del Instituto Optica Daza de Valdes Madrid, 47, 1) have also been confirmed and revised, and three of their missing levels have been found. The energy uncertainty of the revised levels has been reduced by about an order of magnitude. In total, 176 even levels and 233 odd levels are presented.
22034. The spectrum of FG Sge in 1992
ID:
ivo://CDS.VizieR/J/A+A/276/389
Title:
The spectrum of FG Sge in 1992
Short Name:
J/A+A/276/389
Date:
21 Oct 2021
Publisher:
CDS
Description:
Wavelength measurements and line identifications from the 0.14A/pixel echelle spectra of FG Sge secured two weeks before the drastic dimming of the star in 1992 are presented. The abundances of 18 elements are derived. These abundances have not changed from 1986. The main features of the chemical composition of FG Sge atmosphere are the depletion of iron-group elements and the marked overabundances (up to 3 dex) of s-process elements. First time in the observational history of FG Sge C_2_ Swan bands are identified in its spectrum.
22035. The Spectrum of IC 418
ID:
ivo://CDS.VizieR/J/PASP/106/745
Title:
The Spectrum of IC 418
Short Name:
J/PASP/106/745
Date:
21 Oct 2021
Publisher:
CDS
Description:
A detailed high spectral resolution study of the spectrum of IC 418 is made for the region 3650{AA} to 10050{AA}, using the Hamilton echelle spectrograph of Lick Observatory, and of the UV spectral region with archival International Ultraviolet Explorer (IUE) data.
22036. The SpeX Prism Library. Published spectra subset.
ID:
ivo://svo.cab/cat/spex
Title:
The SpeX Prism Library. Published spectra subset.
Short Name:
SpeX
Date:
03 Jun 2020 15:30:39
Publisher:
SVO/CAB
Description:
SpeX Prism Library. Published spectra.
22037. The Spitzer c2d survey of clouds. XII. Perseus
ID:
ivo://CDS.VizieR/J/AJ/150/40
Title:
The Spitzer c2d survey of clouds. XII. Perseus
Short Name:
J/AJ/150/40
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Spitzer Space Telescope mapped the Perseus molecular cloud complex with the Infrared Array Camera (IRAC) and the Multi-Band Imaging Photometer for Spitzer (MIPS) as part of the c2d Spitzer Legacy project. This paper combines the observations from both instruments giving an overview of low-mass star formation across Perseus from 3.6 to 70{mu}m. We provide an updated list of young stellar objects (YSOs) with new classifications and source fluxes from previous works, identifying 369 YSOs in Perseus with the Spitzer data set. By synthesizing the IRAC and MIPS maps of Perseus and building on the work of previous papers in this series, we present a current census of star formation across the cloud and within smaller regions. Sixty-seven percent of the YSOs are associated with the young clusters NGC 1333 and IC 348. The majority of the star formation activity in Perseus occurs in the regions around the clusters to the eastern and western ends of the cloud complex. The middle of the cloud is nearly empty of YSOs despite containing regions of high visual extinction. The western half of Perseus contains three-quarters of the total number of embedded YSOs (Class 0+I and Flat spectral energy distribution sources) in the cloud and nearly as many embedded YSOs as Class II and III sources. Class II and III objects greatly outnumber Class 0+I objects in eastern Perseus and IC 348. These results are consistent with previous age estimates for the clusters. Across the cloud, 56% of YSOs and 91% of the Class 0+I and Flat sources are in areas where A_v_>=5mag, indicating a possible extinction threshold for star formation.
22038. The Spitzer c2d survey of WTTSs. III.
ID:
ivo://CDS.VizieR/J/ApJ/724/835
Title:
The Spitzer c2d survey of WTTSs. III.
Short Name:
J/ApJ/724/835
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present 3.6 to 70um Spitzer photometry of 154 weak-line T Tauri stars (WTTSs) in the Chamaeleon, Lupus, Ophiuchus, and Taurus star formation regions, all of which are within 200pc of the Sun. For a comparative study, we also include 33 classical T Tauri stars which are located in the same star-forming regions. Spitzer sensitivities allow us to robustly detect the photosphere in the IRAC bands (3.6 to 8um) and the 24um MIPS band. In the 70um MIPS band, we are able to detect dust emission brighter than roughly 40 times the photosphere. These observations represent the most sensitive WTTSs survey in the mid- to far-infrared to date and reveal the frequency of outer disks (r=3-50AU) around WTTSs. The 70um photometry for half the c2d WTTSs sample (the on-cloud objects), which were not included in the earlier papers in this series, those of Padgett et al. (2006ApJ...645.1283P) and Cieza et al. (2007, Cat. J/ApJ/667/308) are presented here for the first time.
22039. The Spitzer Deep, Wide-Field Survey (SDWFS)
ID:
ivo://CDS.VizieR/J/ApJ/701/428
Title:
The Spitzer Deep, Wide-Field Survey (SDWFS)
Short Name:
J/ApJ/701/428
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Spitzer Deep, Wide-Field Survey (SDWFS) is a four-epoch infrared survey of 10deg^2^ in the Bootes field of the NOAO Deep Wide-Field Survey using the IRAC instrument on the Spitzer Space Telescope. SDWFS, a Spitzer Cycle 4 Legacy project, occupies a unique position in the area-depth survey space defined by other Spitzer surveys. The four epochs that make up SDWFS permit-for the first time-the selection of infrared-variable and high proper motion objects over a wide field on timescales of years. Because of its large survey volume, SDWFS is sensitive to galaxies out to z~3 with relatively little impact from cosmic variance for all but the richest systems. The SDWFS data sets will thus be especially useful for characterizing galaxy evolution beyond z~1.5. This paper explains the SDWFS observing strategy and data processing, presents the SDWFS mosaics and source catalogs, and discusses some early scientific findings. The publicly released, full-depth catalogs contain 6.78, 5.23, 1.20, and 0.96x10^5^ distinct sources detected to the average 5{sigma}, 4"-diameter, aperture-corrected limits of 19.77, 18.83, 16.50, and 15.82 Vega mag at 3.6, 4.5, 5.8, and 8.0um, respectively. The SDWFS number counts and color-color distribution are consistent with other, earlier Spitzer surveys. At the 6 minute integration time of the SDWFS IRAC imaging, >50% of isolated Faint Images of the Radio Sky at Twenty cm radio sources and >80% of on-axis XBootes sources are detected out to 8.0um. Finally, we present the four highest proper motion IRAC-selected sources identified from the multi-epoch imaging, two of which are likely field brown dwarfs of mid-T spectral class.
22040. The Spitzer infrared nearby galaxies survey
ID:
ivo://CDS.VizieR/J/ApJ/693/1821
Title:
The Spitzer infrared nearby galaxies survey
Short Name:
J/ApJ/693/1821
Date:
21 Oct 2021
Publisher:
CDS
Description:
High-resolution mid-infrared spectra are presented for 155 nuclear and extranuclear regions from the Spitzer Infrared Nearby Galaxies Survey (SINGS). The fluxes for nine atomic forbidden and three molecular hydrogen mid-infrared emission lines are also provided, along with upper limits in key lines for infrared-faint targets. The SINGS sample shows a wide range in the ratio of [SIII]18.71um/[SIII]33.48um, but the average ratio of the ensemble indicates a typical interstellar electron density of 300-400cm^-3^ on ~23x15" scales and 500-600cm^-3^ using ~11x9" apertures, independent of whether the region probed is a star-forming nuclear, a star-forming extranuclear, or an active galactic nuclei (AGN) environment.

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