- ID:
- ivo://CDS.VizieR/J/ApJ/753/83
- Title:
- Associations to 1FGL sources
- Short Name:
- J/ApJ/753/83
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Fermi Large Area Telescope (LAT) First Source Catalog (1FGL) provided spatial, spectral, and temporal properties for a large number of {gamma}-ray sources using a uniform analysis method. After correlating with the most-complete catalogs of source types known to emit {gamma} rays, 630 of these sources are "unassociated" (i.e., have no obvious counterparts at other wavelengths). Here, we employ two statistical analyses of the primary {gamma}-ray characteristics for these unassociated sources in an effort to correlate their {gamma}-ray properties with the active galactic nucleus (AGN) and pulsar populations in 1FGL. Based on the correlation results, we classify 221 AGN-like and 134 pulsar-like sources in the 1FGL unassociated sources. The results of these source "classifications" appear to match the expected source distributions, especially at high Galactic latitudes. While useful for planning future multiwavelength follow-up observations, these analyses use limited inputs, and their predictions should not be considered equivalent to "probable source classes" for these sources. We discuss multiwavelength results and catalog cross-correlations to date, and provide new source associations for 229 Fermi-LAT sources that had no association listed in the 1FGL catalog. By validating the source classifications against these new associations, we find that the new association matches the predicted source class in ~80% of the sources.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/A+AS/125/229
- Title:
- A standard stellar library
- Short Name:
- J/A+AS/125/229
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The present library provides an extensive and homogeneous grid of low-resolution theoretical flux distributions for a large range of stellar parameters : Teff=50,000K to K, logg=5.50 to -1.02 and [M/H]=-5.0 to +1.0. The library has been constructed from different grids of blanketed stellar atmosphere models (Bessell et al. (1989A&AS...77....1B, 1991A&AS...89..335B), Fluks et al. (1994, Cat. <J/A+AS/105/311>), Kurucz (1995, priv. comm.), Allard & Hauschildt (1995ApJ...445..433A). The models described in the accompanying paper (Lejeune et al. (1997A&AS..125..229L) are given here as part of a more extensive data set including M dwarf model spectra, which will be presented in a forthcoming paper (Lejeune et al., 1998, Cat. <J/A+AS/130/65>). A correction procedure has been applied to the theoretical energy in order to calibrate fluxes on empirical-temperature relations (see also Lejeune et al., 1998, Cat. <J/A+AS/130/65>). The library is given here in its two versions : the first one (files *.ori) containing the "original" flux distributions -- as given by the original grids of atmosphere models --, but rebinned on a common wavelength scale (see also Leitherer et al. 1996PASP..108..996L) and the second one (files *.cor) which provides the "corrected" flux distributions. Each version of the library contains an ASCII file of models for each of the 19 values of the metallicity ([M/H]=-5.0, -4.5, -4.0, -3.5, -3.0, -2.5, -2.0, -1.5, -1.0, -0.5, -0.3, -0.2, -0.1, 0.0, +0.1, +0.2, +0.3, +0.5 and +1.0), named as lcbxxx.yyy, where xxx designates the metallicity (ex: 'm15' --> [M/H]=-1.5), and yyy identifies the library version. For each model (out of the total of 8315 models), a flux spectrum is given for the (same) set of 1221 wavelength points covering the range 9.1 to 160000 nm, with a mean resolution of 10{AA} in the UV and 20{AA} in the visible. In addition to the 19 metallicity files, two individual files originating from the Kurucz (1991, in Precision Photometry: Astrophysics of the Galaxy, Davis Philip A.G., Upgren A.R. & Janes K.A. (eds.). Schenectady, NY, L. Davis Press, Inc., 1991, pp. 27-44)) models are given, lcbsun.ori and lcbvega.ori, which provide theoretical flux distributions for the Sun and Vega respectively.
- ID:
- ivo://CDS.VizieR/J/A+AS/130/65
- Title:
- A standard stellar library. II.
- Short Name:
- J/A+AS/130/65
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A standard library of theoretical stellar spectra intended for multiple synthetic photometry applications including spectral evolutionary synthesis is presented. The grid includes M dwarf model spectra, hence complementing the first library version established in Paper I (Lejeune et al., 1997, Cat. <J/A+AS/125/229>). It covers the following wide ranges of fundamental parameters: Teff: 50,000 to 2000K, logg: 5.5 to -1.02, and [Fe/H]: +1.0 to -5.0. A correction procedure is also applied to the theoretical spectra in order to provide color-calibrated flux distributions over a large domain of effective temperatures. Empirical Teff-color calibrations are constructed between 11500K and 2000K, and semi-empirical calibrations for non-solar abundances ([Fe/H]=-3.5 to +1.0) are established. Model colors and bolometric corrections for both the original and the corrected spectra, synthesized in the UBV(RI)c(JHKLL'M) system, are given for the full range of stellar parameters. Synthetic colors: ---------------- Synthetic UBV(RI)c(JHKLM) colors have been computed from both the original and the corrected model flux distributions presented in Paper I (1997A&AS..125..229L; see catalog <J/A+AS/125/229>), as the files lcb98ori.dat and lcb98cor.dat respectively; the results are also presented in individual files lcb98xxx.ori and lcb98xxx.cor, where xxx designates the metallicity (ex: 'm15' --> [Fe/H]=-1.5). For each file, we give synthetic colors computed from energy-weighted and photon-weighted stellar fluxes. Semi-empirical calibrations: --------------------------- Empirical ([Fe/H]=0.0) and semi-empirical (-3.5<=[Fe/H]<=+1.0) Teff-colors (UBVRIJHKLM) calibrations are given in Tables 1 to 10.
- ID:
- ivo://CDS.VizieR/J/PASP/116/1012
- Title:
- A star catalog for the open cluster NGC 188
- Short Name:
- J/PASP/116/1012
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present new BVRI broadband photometry for the old open cluster NGC 188, based on an analysis of 299 CCD images either obtained by us, donated by colleagues, or retrieved from public archives.
- ID:
- ivo://CDS.VizieR/J/ApJ/722/605
- Title:
- A stellar rotation census of B stars
- Short Name:
- J/ApJ/722/605
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Two recent observing campaigns provide us with moderate dispersion spectra of more than 230 cluster and 370 field B stars. Combining them and the spectra of the B stars from our previous investigations (~430 cluster and ~100 field B stars) yields a large, homogeneous sample for studying the rotational properties of B stars. We derive the projected rotational velocity vsini, effective temperature, gravity, mass, and critical rotation speed V_crit_ for each star. We compare the evolutionary trends of rotation (measured according to the polar gravity of the star) with recent models that treat internal mixing.
- ID:
- ivo://CDS.VizieR/J/PASP/110/863
- Title:
- A Stellar Spectral Flux Library: 1150 - 25000 A
- Short Name:
- J/PASP/110/863
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Available published spectra have been combined to form a library of digital stellar spectra spanning 1150 - 25000 A with a sampling interval of 5 A and a resolution of ~500. The library was constructed to enable synthesis and modeling of the integrated light from composite populations. The library consists of 131 flux-calibrated spectra, encompassing all normal spectral types and luminosity classes at solar abundance, plus metal-weak and metal-rich F-K dwarfs and G-K giants. Each library spectrum was formed by combining data from several sources overlapping in wavelength coverage. The data sources are listed in file srclist.doc, and the specific components used to form each spectrum are identified in file complist.doc. The library has complete spectral coverage from 1150 - 10620 A for all spectra and to 25000 A for about half of them, mainly later types of solar abundance. Missing spectral coverage in the infrared consists of a smooth energy distribution formed from standard colors for the relevant types. The library spectra are each given as normalized F(lambda) vs. wavelength in A: each spectrum is normalized to 1.0 at 5556 A. Spectra are organized in two groups of 131 files each; the files are named according to the spectral type, luminosity class and metallicity. The first group of files, designated UVILIB, contains the final combined spectra from 1150 - 11620 A. The second set of files, UVKLIB, extends the UVILIB spectra out to 25000 A, as described above. The data files contain the wavelength, normalized flux and standard deviation for the final combined spectrum in the first three columns. Subsequent columns contain the normalized flux for component spectra which were used to make the final spectrum. Columns which contain these component spectra are labelled according to a code which specifies the source of that spectrum (see complist.doc for more detail) -- UVILIB component codes Code Occasional Alternate Reference source Codes fsv Sviderskiene 1988, Cat. <VI/50> fi (IUE) Heck et al. 1984, Cat. <III/83> fg Gunn & Stryker 1983, Cat. <III/88> fk Kiehling 1987, Cat. <III/124> fj Jacoby, Hunter & Christian 1984, Cat. <III/92> fs Silva & Cornell 1992, Cat. <III/166> fp Pickles 1985, Cat. <VII/102> fn (N6522) Pickles & van der Kruit 1990 (1990A&AS...84..421P) fr fr1, fr2 Serote Roos, Boisson & Joly 1996, Cat. <J/A+AS/117/93> fd fdd1, fdd2; fd3, fd4 Danks & Dennefeld 1994 (1994PASP..106..382D) UVKLIB component codes Code Reference source fh spectrum from UVILIB fse interpolated spectrum based on standardized flux points fl Lancon & Rocca-Volmerange 1992, Cat. <III/196> fd Dallier, Boisson & Joly 1996, Cat. <J/A+AS/116/239> fk Kleinmann & Hall 1986 (1986ApJS...62..501K) fc Cohen et al. (1995, 1996a, 1996b); Cat. <J/AJ/110/275>, <J/AJ/112/241>, <J/AJ/112/2274> fm Fluks et al. 1994, Cat. <J/A+AS/105/311> M giant spectra in UVKLIB include the synthetic M0-M10 MK type spectra from Fluks et. al. (1994), and are a combination of these and the UVILIB spectra in the range 1150-10620A. M0-M8 III are the only cases where the 1150-10500A data differ between UVILIB and UVKLIB. M9 and M10 III spectra are exclusively synthetic spectra from Fluks et. al. (1994) in both libraries. In addition to the spectrum library itself, synthetic photometry and selected local equivalent widths & magnitude indices are provided in tables synphot.dat and lew.dat. The standard infrared colors used to form the smooth energy curves used in UVKLIB spectra are listed in irstphot.dat. Further documentation details are available in the *.doc files as described below in the table notes in this ReadMe.
- ID:
- ivo://CDS.VizieR/J/ApJS/226/21
- Title:
- ASTEP catalog of EB* and variable stars
- Short Name:
- J/ApJS/226/21
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We used the large photometric database of the ASTEP program, whose primary goal was to detect exoplanets in the southern hemisphere from Antarctica, to search for eclipsing binaries (EcBs) and variable stars. 673 EcBs and 1166 variable stars were detected, including 31 previously known stars. The resulting online catalogs give the identification, the classification, the period, and the depth or semi-amplitude of each star. Data and light curves for each object are available at http://astep-vo.oca.eu/.
- ID:
- ivo://CDS.VizieR/J/A+A/423/381
- Title:
- Asteroidal I, J, K in the DENIS Survey
- Short Name:
- J/A+A/423/381
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- I, J, K magnitudes of 767 asteroids (numbered between 1 and 8000) are presented here. These asteroids have been recovered in the DENIS Survey (Deep European Near-Infrared southern sky Survey) on the basis of their predicted ephemerides. The observations were performed with the 1m-telescope at ESO, La Silla (Chile). The limiting magnitudes of the three bands I, J, K centered at 0.8, 1.25 and 2.15 microns are respectively 18.5, 16.5 and 13.5.
- ID:
- ivo://CDS.VizieR/J/A+A/375/275
- Title:
- Asteroidal I, J, K in the DENIS Survey
- Short Name:
- J/A+A/375/275
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- I, J, K magnitudes of 1233 asteroids (numbered between 1 and 8000) are presented here. These asteroids have been recovered in the DENIS Survey (Deep European Near-Infrared southern sky Survey) on the basis of their predicted ephemerides. The observations were performed with the 1m-telescope at ESO, La Silla (Chile). The limiting magnitudes of the three bands I, J, K centered at 0.8, 1.25 and 2.15 microns are respectively 18.5, 16.5 and 13.5.
- ID:
- ivo://CDS.VizieR/J/A+A/465/331
- Title:
- Asteroid brightness and geometry
- Short Name:
- J/A+A/465/331
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present physical models of ten asteroids obtained by means of lightcurve inversion. A substantial part of the photometric data was observed by amateur astronomers. We emphasize the importance of a coordinated network of observers that will be of extreme importance for future all-sky asteroids photometric surveys.
