- ID:
- ivo://CDS.VizieR/J/A+A/606/A107
- Title:
- K2/HARPS measurements for 8 stars
- Short Name:
- J/A+A/606/A107
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- One of the best ways to improve our understanding of the stellar activity-induced signal in radial velocity (RV) measurements is through simultaneous high-precision photometric and RV observations. This is of prime importance to mitigate the RV signal induced by stellar activity and therefore unveil the presence of low-mass exoplanets. The K2 Campaign 7 and 8 fields of view were located in the southern hemisphere, and provided a unique opportunity to gather unprecedented simultaneous high-precision photometric observation with K2 and high-precision RV measurements with the HARPS spectrograph to study the relationship between photometric variability and RV jitter. We observed nine stars with different levels of activity, from quiet to very active. We first probed the presence of any meaningful relation between measured RV jitter and the simultaneous photometric variation, and also other activity indicators (such as BIS, FWHM, logR0'HK, and F8) by evaluating the strength and significance of the monotonic correlation between RVs and each indicator. We found that for the case of very active stars, strong and significant correlations exist between almost all the observables and measured RVs; however, when we move towards lower activity levels the correlations become random, and we could not reach any conclusion regarding the tendency of correlations depending on the stellar activity level. Except for the F8 whose strong correlation with RV jitter persists over a wide range of stellar activity level, and thus our result suggests that F8 might be a powerful proxy for activity-induced RV jitter over a wide range of stellar activity. Moreover, we examine the capability of two state-of-the-art modeling techniques, namely the FF' method and SOAP2.0, to accurately predict the RV jitter amplitude using the simultaneous photometric observation. We found that for the very active stars both techniques can predict the amplitude of the RV jitter reasonably well; however, at lower activity levels the FF' method underpredicts the RV jitter amplitude.
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- ID:
- ivo://CDS.VizieR/B/cfht
- Title:
- Log of CFHT Exposures
- Short Name:
- B/cfht
- Date:
- 20 Feb 2022 05:50:15
- Publisher:
- CDS
- Description:
- This database contains a log of the Canadian-France-Hawaii Telescope observations since 1979, managed the the Canadian Astronomical Data Center (CADC). The data are regularly updated (see the date of the last version at the end of this file).
- ID:
- ivo://CDS.VizieR/VI/128
- Title:
- Log of CGPS exposures
- Short Name:
- VI/128
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Dominion Radio Astrophysical Observatory at Penticton (HIA/NRC), in collaboration with an international Consortium of astronomers, has begun a high-resolution survey of the atomic hydrogen and radio continuum emission from our Milky Way galaxy. By constructing a mosaic of 190 synthesis fields, the survey will cover Galactic longitudes from L=74.2 to 147.3 degrees and latitudes from B=-3.6 to +5.6 degrees, resolving features as small as 1 arcminute. For each mosaic (1024x1024 pixels), atomic hydrogen observations are presented as a data "cube" with 272 spectral channels having a velocity resolution of 1.3km/s. Stokes I continuum images at 1420MHz and 408MHz are produced, as well as selected Stokes Q, U and V images at 1420MHz. Complementary images in the four IRAS infrared bands and data cubes of CO (J=1-0) emission have also been created as part of the Survey. In addition to the 5x5{deg} mosaics, a series of nine 15x15{deg} mosaics of 408MHz emission, and possibly other lower radio frequencies, will be created. Mosaics are archived as they are processed and released to the Consortium. Archived data are in FITS format, except for the occasional text file. Imaging of the molecular phase of the ISM, traced by the CO molecule, has been realized at the Five College Radio Astronomy Observatory. High-resolution IRAS images of the dust component, seen through its infrared emission, have been completed at far-infrared wavelengths at the California Institute of Technology, and in the mid-infrared at the Canadian Institute for Theoretical Astrophysics at the University of Toronto. Complementary radio continuum images at frequencies below 408MHz are being contributed by the Mullard Radio Astronomy Observatory of the University of Cambridge and at the Beijing Astronomical Observatory.
- ID:
- ivo://CDS.VizieR/J/ApJ/663/1021
- Title:
- Log of {omega} Cen scientific images
- Short Name:
- J/ApJ/663/1021
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a photometric investigation on HB, RGB, and MSTO stars in omega Cen = NGC 5139. The center of the cluster was covered with a mosaic of F435W, F625W, and F658N band data collected with HST ACS. The outer reaches were covered with a mosaic of U-, B-, V-, and I-band data collected with the 2.2 m ESO/MPI telescope. The final catalog includes ~1.7 million stars. We identified more than 3200 likely HB stars, the largest sample ever collected in a globular cluster.
- ID:
- ivo://CDS.VizieR/B/subaru
- Title:
- Log of Subaru Prime Focus Camera Exposures
- Short Name:
- B/subaru
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This database contains a log of the Subaru Prime Focus Camera (Suprime-Cam) exposures since April 2001. The data are regularly updated, and the last date of the log is written in "File Summary". Note that from this version of Nov. 2005, the data number is largely increased because those data with worse position determination (up to 30 arcsec error) are included. Suprime-Cam is an 80-mega pixels (10240 x 8192) mosaic CCD camera, for the wide-field prime focus of the 8.2m Subaru telescope. Suprime-Cam covers a field of view 34'x27', a unique facility among the 8-10m class telescopes, with a resolution of 0".202 per pixel. The focal plane consists of ten high- resistivity 2kx2k CCDs developed by MIT Lincoln Laboratory, which are cooled by a large Stirling-cycle cooler. The CCD readout electronics was designed to be scalable, which allows the multiple read-out of tens of CCDs. It takes 50 seconds to readout entire arrays. A filter-exchange mechanism of the jukebox type is designed that can hold up to ten large filters (205x170x15mm^3^). The wide-field corrector is basically a three-lens Wynne- type, but has a new type of atmospheric dispersion corrector. The corrector provides a flat focal plane and an un-vignetted field of view of 30' in diameter. The achieved co-planarity of the focal array mosaic is smaller than 30um peak-to-peak, which realizes mostly the seeing limited image over the entire field. The median seeing in the I_c-band, measured over one year and a half, is 0".61. The PSF anisotropy in Suprime-Cam images, estimated by stellar ellipticities, is about 2% under this median seeing condition. At the time of commissioning, Suprime-Cam had the largest survey speed, which is defined as the field of view multiplied by the primary mirror area of the telescope, among those cameras built for sub-arcsecond imaging. For details, see: Miyazaki et al., Publ. Astron. Soc. Japan 54, 833-853, 2002 (2002PASJ...54..833M)
- ID:
- ivo://CDS.VizieR/J/PASJ/65/119
- Title:
- Low-resolution NIR spectra of zodiacal light
- Short Name:
- J/PASJ/65/119
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalog contains the 278 low-resolution (R~20) near-infrared (1.8-5.3micron) spectra of diffuse sky covering a wide range of galactic and ecliptic latitudes with the Infrared Camera (IRC) on board AKARI before the exhaustion of liquid-helium (from September 2006 to May 2007). Advanced reduction methods specialized for the slit spectroscopy of diffuse sky spectra are developed for constructing this spectral catalog. Filter wheel of the IRC instrument has dark position to measure the dark current, and uncertainty due to dark current subtraction is estimated to be <3nW/m2/sr at 2micron (Tsumura & Wada, 2011PASJ...63..755T). Point sources brighter than mK(Vega)=19 were detected on the slit and masked for deriving the diffuse spectrum. It was confirmed that the brightness due to unresolved galactic stars under this detection limit is negligible (<0.5% of the sky brightness at 2.2 micron) by a Milky Way star count model (TRILEGAL; Girardi et al., 2005A&A...436..895G). Cumulative brightness contributed by unresolved galaxies can be estimated by the deep galaxy counts, being <4nW/m2/sr at K band in the case of limiting magnitude of mK=19 (Keenan et al., 2010ApJ...723...40K).
- ID:
- ivo://archive.stsci.edu/catalogs/obspointing
- Title:
- MAST CAOM ObsPointing ConeSearch
- Short Name:
- MAST ObsPointing
- Date:
- 30 Oct 2024 18:49:06
- Publisher:
- Space Telescope Science Institute Archive
- Description:
- All MAST catalog holdings are available via a ConeSearch endpoint. This service provides access to MAST holdings with pointing positional information in the Common Archive Observation Model (CAOM) database, by providing access to the ObsPointing table as a cone search. This serves the same data as the MAST CAOMTAP service, linked as an auxiliary capability. Available missions are listed at http://archive.stsci.edu/vo/mast_services.html.
- ID:
- ivo://archive.stsci.edu/catalogs/obscore
- Title:
- MAST ObsCore ConeSearch
- Short Name:
- MAST ObsCore
- Date:
- 30 Oct 2024 18:53:29
- Publisher:
- Space Telescope Science Institute Archive
- Description:
- All MAST catalog holdings are available via a ConeSearch endpoint. This service provides access to all MAST holdings with positional information that have been ingested into the Common Archive Observation Model (CAOM) and its summarized ObsCore format. It provides access to the same data as the CAOMTAP TAP service, linked as an auxiliary resource. Available missions are listed at http://archive.stsci.edu/vo/mast_services.html.
- ID:
- ivo://archive.stsci.edu/catalogs/skymapperdr4
- Title:
- MAST SkyMapper Southern Survey Data Release 4 (SMSS DR4)
- Short Name:
- MAST SkyMapper
- Date:
- 16 Apr 2024 20:18:39
- Publisher:
- Space Telescope Science Institute Archive
- Description:
- MAST hosts a copy of the SkyMapper DR4 catalog. SMSS DR4 contains optical photometry in the 6 SkyMapper filters (u,v,g,r,i,z) for ~700 million astrophysical sources over 26,000 sq.deg, ranging from the South Celestial Pole to Dec=+16 degrees for objects with data in all bands, and some sources as far North as +29 degrees. The photometry is drawn from over 15 billion measurements made from more than 400,000 images acquired by the 1.3m SkyMapper telescope between March 2014 and September 2021. The typical 10-sigma depths for each field range between 18.5 and 20.5 ABmag, depending on the filter, but certain sky regions include longer exposures that reach as deep as 22 ABmag. Compared to previous SkyMapper data releases, DR4 includes significant enhancements in data processing, most notably a new photometric calibration anchored to synthetic photometry from Gaia low-resolution spectroscopy, which resolves reddening- and spatial-trends identified in previous releases, especially in the bluest filters, u and v. A large number of other photometric and spectroscopic surveys have been cross-matched to the dr4.master table of objects, to facilitate various scientific investigations.
- ID:
- ivo://archive.stsci.edu/tap/hlsp_candels
- Title:
- MAST STScI CANDELS HLSP TAP service
- Short Name:
- HLSP CANDELS TAP
- Date:
- 27 Jan 2025 22:34:44
- Publisher:
- Space Telescope Science Institute Archive
- Description:
- The Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS) is designed to document the first third of galactic evolution from z = 8 to 1.5 via deep imaging of more than 250,000 galaxies with WFC3/IR and ACS. The Table Access Protocol (TAP) lets you execute queries against our database tables, and inspect various metadata. Upload is not currently supported.
