J/MNRAS/426/2652 Keck Aperture Masking Experiment. Red giants (Blasius+, 2012)
The Keck Aperture Masking Experiment: dust-enshrouded red giants.
Blasius T.D., Monnier J.D., Tuthill P.G., Danchi W.C., Anderson M.
<Mon. Not. R. Astron. Soc., 426, 2652-2667 (2012)>
=2012MNRAS.426.2652B 2012MNRAS.426.2652B
ADC_Keywords: Stars, giant ; Photometry, infrared
Keywords: radiative transfer - instrumentation: interferometers -
circumstellar matter
Abstract:
While the importance of dusty asymptotic giant branch (AGB) stars to
galactic chemical enrichment is widely recognized, a sophisticated
understanding of the dust formation and wind-driving mechanisms has
proven elusive due in part to the difficulty in spatially resolving
the dust-formation regions themselves. We have observed 20
dust-enshrouded AGB stars as part of the Keck Aperture Masking
Experiment, resolving all of them in multiple near-infrared bands
between 1.5 and 3.1um.
Description:
Our observations consist of photometric and visibility data taken on
20 different stars at the W.M. Keck Observatory between 1997 December
and 2002 July.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 77 20 Basic properties of targets
table3.dat 88 89 Journal of observations and derived photometry
table5.dat 70 85 Results from circularly symmetric Gaussian models
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Target Target name
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 29 F7.4 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 43 F6.3 arcsec DEs Declination (J2000)
45- 49 F5.2 mag Vmag ?=- V magnitude
51 I1 --- r_Vmag [1/4]? Reference for Vmag (2)
54- 59 F6.3 mag Jmag 2MASS J magnitude (1)
61- 66 F6.3 mag Hmag 2MASS H magnitude (1)
68- 72 F5.3 mag Ksmag 2MASS Ks magnitude (1)
74- 75 A2 --- SpType MK spectral type
77 I1 --- r_SpType [1/7] Reference for spectral type (2)
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Note (1): These magnitudes (from 2MASS) are merely representative since the
targets are variable. See Table 3 for our new photometry.
Note (2): References as follows:
1 = SIMBAD
2 = Monet (1998, USNO-A2.0 Catalogue, Cat. I/252)
3 = Buscombe (1998, 13th General Catalogue of MK SpType, Cat. III/206)
4 = Egret et al. (1992, Tycho Input Catalogue, Cat. I/197)
5 = Skiff (2009, Cat. B/mk)
6 = Olnon (2006, 2MASX, Cat. VII/233), see also
www.iras.ucalgary.ca/∼volk/getlrs_plot.html
7 = Garcia-Hernandez et al. (2007A&A...462..711G 2007A&A...462..711G)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Target Target name
17- 30 A14 --- Date Observation date (UT)
32- 36 A5 --- Filt Filter name
40- 50 A11 --- Mask Aperture mask
51 A1 --- n_Mask [*] Extrapolated aperture mask (1)
55- 59 F5.2 mag mag Magnitude in filter
61- 64 F4.2 mag e_mag rms uncertainty on mag
66- 88 A23 --- Calib Calibrator names
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Note (1): *: This point was extrapolated from another epoch for the same star
and assigned an error of 0.2mag.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Target Target name
16 A1 --- n_Target [*] *: Target is asymmetric
17- 30 A14 --- Date Observation date (UT)
33- 37 A5 --- Filt Filter name
41- 50 A10 --- Mask Aperture mask: FFA (fully-filled aperture),
Golay 21, or annulus 36
53- 56 F4.2 --- V0 Visibility at zero baseline (±0.05)
58- 59 I2 km/s FWHM FWHM for the best fit for all data sets
61 I1 km/s E_FWHM Error on FWHM (upper value)
64- 65 I2 km/s e_FWHM Error on FWHM (lower value)
67- 70 F4.2 --- chi2r chi2/DOF ratio
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Apr-2013