J/A+A/450/253 JHKL photometry of RCW57/NGC3576 (Maercker+, 2006)
L-band (3.5 micron) IR-excess in massive star formation. II. RCW 57/NGC 3576.
Maercker M., Burton M.G., Wright C.M.
<Astron. Astrophys. 450, 253 (2006)>
=2006A&A...450..253M 2006A&A...450..253M
ADC_Keywords: H II regions ; Photometry, infrared
Keywords: stars: circumstellar matter - stars: formation - stars: evolution -
stars: Hertzsprung-Russel (HR) and C-M diagrams -
stars: planetary systems: protoplanetary disks -
stars: pre-main sequence
Abstract:
L-band data of RCW 57 at 3.5 micron taken with SPIREX (South Pole
Infrared Explorer) is presented. The photometry was combined with
2MASS JHK data at 1.25 -2.2 micron. Colour-colour and colour-magnitude
diagrams are constructed and used to determine the sources with
infrared excess. These are interpreted as circumstellar disks, and
enable the fraction of sources with disks (the cluster disk fraction
or CDF) to be determined. We find that more than 50% of the sources
detected at L-band in RCW 57 have an IR-excess.
Description:
Magnitudes for all sources (including foreground sources and sources
below the 90% completeness limit) in RCW 57. Stars with measurements
in all four bands are listed first. Then stars with measurements in
K_s and L only, and finally stars just detected in L-band.
The coordinates for sources found in all four bands are from the 2MASS
point source catalogue (PSC), positions for the remaining stars are
determined by reference to 2MASS images.
The L-band errors are combined from the errors in daophot and the
errors due to the zero point correction. Sources only detected in the
K_s- and L-bands have magnitudes determined from this work.
For sources not detected at J, H or K_s the upper limits on these
magnitudes are 15.8, 15.1 and 14.3 respectively.
Objects:
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RA (2000) DE Designation(s)
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11 11 49.8 -61 18 14 NGC 3576 = RCW 57A
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 120 251 Magnitudes for all sources (including foreground
sources and sources below the 90% completeness
limit) in RCW 57
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See also:
J/A+A/438/663 : JHKL photometry of 30 Dor (Maercker+, 2005)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 I3 -- Seq Sequential number in paper
6- 7 I2 h RAh Right ascension J2000 (hours)
9- 10 I2 min RAm Right ascension J2000 (minutes)
12- 15 F4.1 s RAs Right ascension J2000 (seconds)
18 A1 -- DE- Declination J2000 (sign)
19- 20 I2 deg DEd Declination J2000 (degrees)
22- 23 I2 arcmin DEm Declination J2000 (arcmin)
25- 28 F4.1 arcsec DEs Declination J2000 (arcsec)
31- 34 F4.1 mag Jmag ? 2MASS PSC J-band magnitude
37- 40 F4.2 mag e_Jmag ? Error in J-band magnitude (1)
43- 46 F4.1 mag Hmag ? 2MASS PSC H-band magnitude
49- 52 F4.2 mag e_Hmag ? Error in H-band magnitude (1)
55- 58 F4.1 mag Kmag ? 2MASS PSC K-band magnitude
61- 64 F4.2 mag e_Kmag ? Error in K-band magnitude (1)
67- 70 F4.1 mag Lmag ? SPIREX PSC L-band magnitude
73- 76 F4.2 mag e_Lmag ? Error in L-band magnitude (1)
79- 82 A4 --- Note [e, fg] Notes (2)
84-120 A37 --- Com Comments (3)
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Note (1): A '---' as error indicates a 95% confidence upper limit
for the 2MASS magnitude in the PSC.
Note (2): Notes as follows:
e = stars with IR-excess
fg = Likely foreground stars
Note (3): Identifications:
No NN = Stars matched with Barbosa et al. (2003AJ....126.2411B 2003AJ....126.2411B)
FBDC NNNa and [FP74] RCW 57 IRS 1 in Simbad
Persi NNN = Stars matched with Persi et al. (1994A&A...282..474P 1994A&A...282..474P)
[PRT94] NNN in Simbad
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Acknowledgements: Matthias Maercker, maercker(at)astro.su.se
(End) Matthias Maercker [Stockholm Obs.], Patricia Vannier [CDS] 16-Dec-2005