J/A+A/433/117 L- & M-band imaging of the Galactic Center (Viehmann+, 2005)
L- and M-band imaging observations of the Galactic Center region
Viehmann T., Eckart A., Schoedel R., Moultaka J., Straubmeier C., Pott J.-U.
<Astron. Astrophys. 433, 117 (2005)>
=2005A&A...433..117V 2005A&A...433..117V
ADC_Keywords: Photometry, classification ; Photometry, infrared
Keywords: Galactic Center - infrared: stars - techniques: photometric -
stars: imaging
Description:
Photometric data of the sources detected in NAOS/CONICA H- and K-band
(1.6 and 2.1µm) and ISAAC L- and M-band (3.8 and 4.7µm) images
of the Galactic Center, obtained in May and August 2002, are
presented. For each source, name (if relevant), position offset, H-,
K-, L- and M-band magnitude (if available) and observed colors (H-K,
K-L and L-M) are given.
The position zero-point is RA = 17:45:40.26, DE = -29:00:29.91
(IRS 16NE) in the J2000 system, with an offset of 2.83" (RA) and
-0.91" (DE) from Sgr A*.
The total photometric accuracy is ±0.25mag in H- and K-band,
±0.15mag in L- and M-band, positional accuracy is ±0.09".
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 86 198 Photometry of sources detected in the NAOS/CONICA
images (18"x18" field of view) and at least one
ISAAC image.
table2.dat 37 427 Photometry of sources outside the NAOS/CONICA
field of view.
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See also:
J/A+AS/97/587 : JHK photometry of Galactic center stars (Ruelas-Mayorga+ 1993)
J/ApJ/470/864 : JHKL photometry of the Galactic Center (Blum+, 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID ID number
5- 13 A9 --- Name Name of source (if known)
15- 20 F6.2 arcsec dRA Right ascension offset from IRS 16NE (G1)
22- 27 F6.2 arcsec dDE Declination offset from IRS 16NE (G1)
30 A1 --- l_Hmag Limit flag due to nondetection
31- 35 F5.2 mag Hmag H-band (1.6um) observed magnitude
37 A1 --- l_Kmag Limit flag due to nondetection
38- 42 F5.2 mag Kmag K-band (2.1um) observed magnitude
44 A1 --- l_Lmag Limit flag due to nondetection
45- 49 F5.2 mag Lmag L-band (3.8um) observed magnitude
51 A1 --- l_Mmag Limit flag due to nondetection
52- 56 F5.2 mag Mmag M-band (4.7um) observation magnitude
59- 63 F5.2 mag H-K Observed H-K color
65- 69 F5.2 mag K-L Observed K-L color
71- 75 F5.2 mag L-M Observed L-M color
78- 86 A9 --- Type Classification (1)
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Note (1): The classifications are from Blum et al. (1996,
Cat. J/ApJ/470/864), with "cool" referring to red giants/
supergiants and "red" signifying objects with featureless K-band
spectra and strong IR excess.
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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- 3 I3 --- ID ID number
5- 10 F6.2 arcsec dRA Right ascension offset from IRS 16NE (G1)
12- 17 F6.2 arcsec dDE Declination offset from IRS 16NE (G1)
20- 24 F5.2 mag Lmag L-band (3.8um) observed magnitude
26- 30 F5.2 mag Mmag M-band (4.7um) observed magnitude
33- 37 F5.2 mag L-M Observed L-M color
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Global notes:
Note (G1): Offset from RA = 17:45:40.26 (2000) DE= -29:00:29.91
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Acknowledgements: Thomas Viehmann, viehmann(at)ph1.uni-koeln.de
(End) Thomas Viehmann [Universitaet zu Koeln, Germany] 08-Feb-2005