[vsnet-chat 2575] (fwd) PUPPIS: new red variable of P Camilleri

[Daisaku Nogami <nogami@kusastro.kyoto-u.ac.jp>]

> Date: Wed, 19 Jan 2000 16:47:28 +0000
> From: JG <jgts@jgws.totalserve.co.uk>
> Subject: [vsnet-chat 0] PUPPIS: new red variable of P Camilleri

> On the new Red Variable in Puppis discovered by Paul Camilleri, Cobram,
> Victoria, Australia, and announced in AAVSO alert 269
>
> CGCS 1825 = CCCS 849 = IRAS_PSC 07373-4021
>
> the following may be of interest to Southern Hemisphere observers:-
>
> This star is also IRAS_PC (IRAS Point Source Catalogue) 07373-4021
> (where the co-ordinates in this catalogue are to 1950)
>
> The identification is confirmed in
>
> EPCHTEIN, N., LE BERTRE, T., LEPINE, J. R. D. <ASTR. AP., 227, 82>
>
> in table 2 of which CCCS 849 is cross identified with object number 51 =
>
> IRAS_PSC 07373-4021, where IRAS_PSC is the IRAS Point Source Catalogue
> Version 2.0 [and the coordinates are epoch B1950].
>
> J, H, K, L and M photometry are given in the above paper for CGCS 1825 =
>
> CCCS 849, and also in a later paper including some of the same authors:
>
> FOUQUE, P., LE BERTRE, T., EPCHTEIN, N., GUGLIELMO, F., KERSCHBAUM, F.
> <ASTR. AP. SUPPL., 93, 151>
>
> where IRAS photometry is also quoted.
>
> The latter paper also carries classification data for this star in its
> table 2, which suggests that it is a cool Carbon star surrounded by a
> Carbon rich Circumstellar Dust Envelope characterised by SiC [Silicon
> Carbide] emission at 11.3 microns, but ironically lies in a region of
> the IRAS two colour diagram predominantly occupied by variable oxygen
> stars with young oxygen rich circumstellar shells (though this region
> does lie adjacent to one characterised by Carbon stars).
>
> The JHKLM photometry, IRAS colours and classifications for this star (as
>
> recorded in the above noted tables) show that this star has strong
> similarities, exactly so with respect to classification, with R Volantis
>
> (from the same tables), a Carbon star noted among others in:
>
> WHITELOCK, P. A., FEAST, M. W., MARANG, F., OVERBEEK, M.D, MNRAS, 288,
> 512 (1997)
>
> as having similarities in their long term lightcurves to the R Coronae
> Borealis stars.
>
> REFS
>
> The above papers are readily available via the NASA ADS Articles &
> Abstracts Service at adsabs.harvard.edu, in both Acrobat PDF and
> Postscript formats
>
> I've forwarded a TDF file to Project Pluto at www.projectpluto.com which
> enables the CGCS to be plotted on-screen in Guide 7 planetarium software
> [look under extra features], details of accessing the catalogue via the
> CDS and ADC are also stated there; I believe the Guide 7 system already
> contains a TDF capability for IRAS_PSC, inclusive of error ellipse
> plotting.
>
> References and data for some the above were first noted from the
> electronic version of the Catalog of Infrared Observations (CIO) 3rd
> edition, NASA Reference Publication 1294 (Gezari et al, 1993)
> The ADC (adc.gsfc.nasa.gov) now carries this particular catalogue at
> edition 5
>
> Cheers and clear skies
>
> John
>
> John Greaves
> UNITED KINGDOM

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