J/A+A/564/A14 Near-infrared photometry of η Carinae (Mehner+, 2014)
Near-infrared evidence for a sudden temperature increase in eta Carinae.
Mehner A., Ishibashi K., Whitelock P., Nagayama T., Feast M., van Wyk F.,
de Wit W.-J.
<Astron. Astrophys. 564, A14 (2014)>
=2014A&A...564A..14M 2014A&A...564A..14M
ADC_Keywords: Stars, variable ; Photometry, infrared
Keywords: stars: massive - stars: variables: S Doradus -
stars: individual: eta Car - stars: winds, outflows - stars: mass-loss
Abstract:
Eta Car's ultra-violet, optical, and X-ray light curves and its
spectrum suggest a physical change in its stellar wind over the last
decade. It has been proposed that the mass-loss rate has decreased by
a factor of about 2 over the last 15 years. We complement these recent
results by investigating the past evolution and the current state of
eta Car in the near-infrared (IR).
Description:
We present JHKL photometry of eta Car obtained at SAAO Sutherland from
2004-2013 with the Mk II photometer at the 0.75-m telescope and JHKs
photometry with SIRIUS at the 1.4-m IRSF telescope from 2012-2013.
Objects:
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RA (2000) DE Designation(s)
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10 45 03.591 -59 41 04.26 eta Car = CD-59 3306
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1a.dat 44 91 *JHKL photometry of eta Car obtained at SAAO
Sutherland from 2004-2013
table1b.dat 55 23 JHKs photometry with SIRIUS at the 1.4-m IRSF
telescope from 2012-2013
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Note on table1a.dat: with the Mk II photometer at the 0.75-m telescope.
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See also:
J/A+A/304/415 : uvby-Hbeta photometry of Eta Car 1992-94 (van Genderen+, 1995)
J/A+A/343/847 : Geneva Photometry of Eta Car (van Genderen+ 1999)
J/A+A/419/215 : Emission lines of Sr filament near η Car (Hartman+, 2004)
J/A+A/493/1093 : BVRI light curves of η Car (Fernandez-Lajus+, 2009)
J/A+A/540/A133 : η Car emission spectrum (1700-10400Å) (Zethson+, 2012)
J/AJ/129/2018 : RXTE scaled fluxes of eta Car (Corcoran+, 2005)
J/ApJS/71/983 : UV spectrum of eta Car (Viotti+ 1989)
J/ApJS/157/138 : UV spectrum of eta Car (Nielsen+, 2005)
J/ApJS/163/173 : UV spectrum of eta Car in 2003.5 (Gull+, 2006)
J/ApJS/168/289 : NUV spectrum of eta Car in 2003.5 (Nielsen+, 2007)
J/ApJS/181/473 : Analysis of the spectrum of η Car (Nielsen+, 2009)
J/other/NewA/15.108 : UBVRIHα of eta Car in 2009 (Fernandez-Lajus+ 2010)
Byte-by-byte Description of file: table1a.dat
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Bytes Format Units Label Explanations
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1- 11 A11 "date" Date Date in UT
13- 19 F7.1 d MJD [53031/56350] Modified Julian Date
21- 25 F5.3 mag Jmag J band magnitude (1)
27- 31 F5.3 mag Hmag H band magnitude (1)
33- 37 F5.3 mag Kmag K band magnitude (1)
39- 44 F6.3 mag Lmag L band magnitude (1)
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Note (1): Magnitudes are in the SAAO IR standard system.
Uncertainties are 0.03 mag in JHK and 0.05 mag in L.
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Byte-by-byte Description of file: table1b.dat
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Bytes Format Units Label Explanations
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1- 11 A11 "date" Date Date in UT
13- 19 F7.1 d MJD [56061/56460] Modified Julian Date
21- 25 F5.3 mag Jmag J band magnitude (1)
27- 31 F5.3 mag e_Jmag rms uncertainty on Jmag
33- 37 F5.3 mag Hmag H band magnitude (1)
39- 43 F5.3 mag e_Hmag rms uncertainty on Hmag
45- 49 F5.3 mag Kmag K band magnitude (1)
51- 55 F5.3 mag e_Kmag rms uncertainty on Kmag
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Note (1): Magnitudes are in the SIRIUS JHKs system.
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Acknowledgements:
Andrea Mehner, amehner(at)eso.org
References:
Whitelock et al., 1983MNRAS.203..385W 1983MNRAS.203..385W
Whitelock et al., 1994MNRAS.270..364W 1994MNRAS.270..364W
Feast et al., 2001MNRAS.322..741F 2001MNRAS.322..741F
Whitelock et al., 2004MNRAS.352..447W 2004MNRAS.352..447W
(End) Patricia Vannier [CDS] 28-Jan-2014