J/A+A/452/503 RR Tel JHKL photometry 1975-2002 (Kotnik-Karuza+, 2006)
The effect of dust obscuration in RR Tel on optical and IR long-term
photometry and Fe II emission lines.
Kotnik-Karuza D., Friedjung M., Whitelock P.A., Marang F., Exter K.,
Keenan F.P., Pollacco D.L.
<Astron. Astrophys. 452, 503 (2006)>
=2006A&A...452..503K 2006A&A...452..503K
ADC_Keywords: Stars, variable ; Novae ; Photometry, infrared
Keywords: stars: binaries: symbiotic - stars: individual: RR Tel -
stars: circumstellar matter
Abstract:
A set of photometric observations of the symbiotic nova RR Tel in
different wavelength bands - visual from 1949 to 2002 and
near-infrared (JHKL) from 1975 to 2002 - are presented. Near-infrared
photometry is used to identify and study three periods during which
the Mira component was heavily obscured by dust. The variability due
to the normal Mira pulsation was removed from the JHKL data, which
were then compared with the AAVSO visual light curve. We discuss these
obscuration events as observed in the different wavelength bands. A
change in the colour trend was observed with the colour becoming
redder after JD2446000. Generally J-K was comparable while K-L was
larger than typical values for solitary Miras. A distance estimate of
2.5kpc, based on the IR data, is given. A study of the behaviour of
the permitted Fe II and forbidden [FeII] emission lines during the
1996-2000 obscuration episode suggests a larger flux decrease for the
permitted than for the forbidden lines. No other correlation with line
properties have been found. The most attractive model involves
obscuration by optically thick clouds in the outer layers.
Description:
The file table1.dat contains a list of JHKL magnitudes monitored from
the South African Astronomical Observatory (SAAO) from 1975 to 2002.
The JHKL magnitudes are accurate to better than 0.03mag in JHK and
0.05mag at L. Some of the early data, which had been published in
Feast et al. (1983MNRAS.202..951F 1983MNRAS.202..951F), were subsequently slightly
corrected to the SAAO system as defined by Carter
(1990MNRAS.242....1C 1990MNRAS.242....1C).
Objects:
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RA (2000) DE Designation(s)
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20 04 18.5 -55 43 33 RR Tel = SV* HV 3181
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 38 132 JHKL magnitudes of RR Tel from 1975 to 2002
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See also:
J/A+AS/139/135 : The Optical Spectrum of RR Tel (Crawford+ 1999)
J/A+AS/124/425 : RR Tel UV emission (Zuccolo+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 F10.2 d JD Julian Date
13- 17 F5.3 mag Jmag Magnitude in J band
20- 24 F5.3 mag Hmag Magnitude in H band
27- 31 F5.3 mag Kmag Magnitude in K band
34- 38 F5.3 mag Lmag ? Magnitude in L band
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Acknowledgements: Dubravka Kotnik-Karuza, dubravka.karuza-kotnik(at)ri.t-com.hr
(End) Patricia Vannier [CDS] 23-Mar-2006