On the usefulness of finding charts

Loup, C.; Delmotte, N.; Egret, D.; Cioni, M. R.; Genova, F.

doi:10.1051/0004-6361:20030187

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…This is especially true in very crowded regions like the one of G001.2-01.2a. Very recently, Loup et al (2003) have given a vivid account of the problems encountered during a work similar in nature to ours but aimed at carbon stars in the LMC. They also note the inherent problems of automated cross-correlation methods and they also had to make extensive use of finding charts for proper object identification.…”

Section: Discussionmentioning

confidence: 99%

Galactic Planetary Nebulae and their central stars

Kerber¹,

Mignani²,

Guglielmetti

et al. 2003

A&A

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Abstract. We have used the 2nd generation of the Guide Star Catalogue (GSC-II) as a reference astrometric catalogue to compile the positions of 1086 Galactic Planetary Nebulae (PNe) listed in the Strasbourg ESO Catalogue (SEC), its supplement and the version 2000 of the Catalogue of Planetary Nebulae. This constitutes about 75% of all known PNe. For these PNe, the ones with a known central star (CS) or with a small diameter, we have derived coordinates with an absolute accuracy of ≈0. 35 in each coordinate, which is the intrinsic astrometric precision of the GSC-II. For another 226, mostly extended, objects without a GSC-II counterpart we give coordinates based on the second epoch Digital Sky Survey (DSS-II). While these coordinates may have systematic offsets relative to the GSC-II of up to 5 arcsecs, our new coordinates usually represent a significant improvement over the previous catalogue values for these large objects. This is the first truly homogeneous compilation of PNe positions over the whole sky and the most accurate one available so far.

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Section: Discussionmentioning

confidence: 99%

Galactic Planetary Nebulae and their central stars

Kerber¹,

Mignani²,

Guglielmetti

et al. 2003

A&A

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“…Considering the mis-identifications or missed cross-identifications as a result of an automatic association criteria, we estimate a contamination of significantly less than 2.7% and 7.9%, respectively, based on Loup et al (2003).…”

Section: C-stars Confirmed Spectroscopicallymentioning

confidence: 99%

Pulsation properties of C stars in the Small Magellanic Cloud

Raimondo

Cioni

Rejkuba

et al. 2005

A&A

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Abstract.A sample of carbon-rich stars (C-stars) in the Small Magellanic Cloud (SMC) was selected from the combined 2MASS and DENIS catalogues on the basis of their J − K s colour. This sample was extended to include confirmed C-stars from the Rebeirot et al. (1993) spectroscopic atlas. In this combined sample (N = 1149), a smaller number (N = 1079) were found to have MACHO observations. For this sub-sample, light curves were determined and 919 stars were found to have high quality light-curves with amplitudes of at least 0.05 mag. Of these stars, only 4% have a well-defined single period -most of these have multiple well-defined periods, while 15% have highly irregular light-curves. The distribution of the logarithm of the period versus magnitude, colour, period ratio (if applicable), and amplitude was analyzed and compared with previous works. Variable C-stars are distributed in three sequences: B, C, and D from Wood et al. (1999), and do not populate sequences with periods shorter than log P ∼ 1.5. Stellar ages and masses were estimated using stellar evolutionary models.

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“…This object exhibits highly divergent periods of 98 days ) and 894-1082 days (Fraser et al 2005(Fraser et al , 2008, although the OGLE-III data on this object are not particularly good . This object is identified as a carbon star by Blanco & McCarthy (1990) and Loup et al (2003) based on near-infrared CN bands. Due to the lack of identifiable carbon-rich features in the IRS spectrum, we classify this object as STAR.…”

Section: Sstisagemcmentioning

confidence: 99%

The SAGE-Spec Spitzer Legacy program: The life-cycle of dust and gas in the Large Magellanic Cloud. Point source classification I

Woods,

Oliveira,

Kemper

et al. 2010

Preprint

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We present the classification of 197 point sources observed with the Infrared Spectrograph in the SAGE-Spec Legacy program on the Spitzer Space Telescope. We introduce a decision-tree method of object classification based on infrared spectral features, continuum and spectral energy distribution shape, bolometric luminosity, cluster membership, and variability information, which is used to classify the SAGE-Spec sample of point sources. The decision tree has a broad application to mid-infrared spectroscopic surveys, where supporting photometry and variability information are available. We use these classifications to make deductions about the stellar populations of the Large Magellanic Cloud and the success of photometric classification methods. We find 90 asymptotic giant branch (AGB) stars, 29 young stellar objects, 23 post-AGB objects, 19 red supergiants, eight stellar photospheres, seven background galaxies, seven planetary nebulae, two Hii regions and 12 other objects, seven of which remain unclassified.

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On the usefulness of finding charts

Cited by 4 publications

References 11 publications

Galactic Planetary Nebulae and their central stars

Galactic Planetary Nebulae and their central stars

Pulsation properties of C stars in the Small Magellanic Cloud

The SAGE-Spec Spitzer Legacy program: The life-cycle of dust and gas in the Large Magellanic Cloud. Point source classification I

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