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- ID:
- ivo://mast.stsci/siap/hst.previews
- Title:
- Hubble Space Telescope Preview Images
- Short Name:
- HST Previews
- Date:
- 22 Jul 2020 22:27:41
- Publisher:
- Space Telescope Science Institute Archive
- Description:
- Quick-look preview images produced and processed by CADC. Data from the following HST instruments are included: WFPC, WFPC2, STIS, NICMOS, FOC, and ACS.
- ID:
- ivo://mast.stsci/ssap/hst
- Title:
- Hubble Space Telescope Spectra
- Short Name:
- HST Spectra
- Date:
- 22 Jul 2020 21:49:04
- Publisher:
- Space Telescope Science Institute Archive
- Description:
- Spectra from the following HST instruments are available: GHRS (processed by CADC), FOS (processed by ECF), and STIS (1st order). Separate SSAP services are registered for each instrument. VO-compatible FITS files were created by MAST staff.
- ID:
- ivo://CDS.VizieR/J/ApJS/247/50
- Title:
- Late-type contact binaries in CSS DR1
- Short Name:
- J/ApJS/247/50
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the physical parameters of 2335 late-type contact binary (CB) systems extracted from the Catalina Sky Survey (CSS). Our sample was selected from the CSS Data Release 1 by strictly limiting the prevailing temperature uncertainties and light-curve fitting residuals, allowing us to almost eliminate any possible contaminants. We developed an automatic Wilson-Devinney-type code to derive the relative properties of CBs based on their light-curve morphology. By adopting the distances derived from CB (orbital) period-luminosity relations (PLRs), combined with the well-defined mass-luminosity relation for the systems' primary stars and assuming solar metallicity, we calculated the objects' masses, radii, and luminosities. Our sample of fully eclipsing CBs contains 1530 W-, 710 A-, and 95 B-type CBs. A comparison with literature data and with the results from different surveys confirms the accuracy and coherence of our measurements. The period distributions of the various CB subtypes are different, hinting at a possible evolutionary sequence. W-type CBs are clearly located in a strip in the total mass versus mass-ratio plane, while A-type CBs may exhibit a slightly different dependence. There are no significant differences among the PLRs of A- and W-type CBs, but the PLR zero-points are affected by their mass ratios and fill-out factors. Determination of zero-point differences for different types of CBs may help us improve the accuracy of the resulting PLRs. We demonstrate that automated approaches to deriving CB properties could be a powerful tool for application to the much larger CB samples expected to result from future surveys.
- ID:
- ivo://ia2.inaf.it/hosted/vipers/ssap
- Title:
- The VIMOS Public Extragalactic Redshift Survey (VIPERS) Spectra
- Short Name:
- VIPERS Spectra
- Date:
- 02 Mar 2015 19:00:00
- Publisher:
- IA2
- Description:
- VIMOS Public Extragalactic Redshift Survey" (VIPERS) is an ongoing ESO Large Program to map in detail the spatial distribution of normal galaxies over an unprecedented volume of the z~1 Universe. VIPERS is using VIMOS at the VLT to measure 100,000 redshifts for galaxies with red magnitude I(AB) brighter than 22.5 over an area of 24 square degrees. At this redshift, VIPERS fills a unique niche in galaxy surveys, optimizing the combination of 5-band accurate photometry from the CFHTLS with the multiplexing capability of VIMOS. A robust color-color pre-selection allows the survey to focus its measurements on the 0.5 <= z <= 1.2 redshift range, yielding an optimal combination of large volume (5 x 107 h-3 Mpc3) and high effective spectroscopic sampling (> 40%). With these figures, the VIPERS data set represents the z~1 equivalent of state-of-the-art "local" (z<=0.2) surveys. VIPERS scientific investigations focus on measurements of large-scale structure and cosmological parameters at an epoch when the Universe was about half its current age. At the same time, the survey can explore the ensemble properties of luminous galaxies, groups and clusters with unprecedented statistical accuracy at these redshifts.
