J/ApJ/642/861 N-band imaging of the Galactic Center (Viehmann+, 2006)
Dusty sources at the Galactic Center the N- and Q-band views with VISIR.
Viehmann T., Eckart A., Schodel R., Pott J.-U., Moultaka J.
<Astrophys. J., 642, 861-867 (2006)>
=2006ApJ...642..861V 2006ApJ...642..861V
ADC_Keywords: Photometry, classification ; Photometry, infrared
Keywords: Galaxy: center - infrared: stars
Abstract:
We present mid-infrared N- and Q-band photometry of the Galactic
center from images obtained with the mid-infrared camera VISIR at the
ESO VLT in 2004 May. The high resolution and sensitivity possible with
VISIR enable us to investigate a total of over 60 pointlike sources,
an unprecedented number for the Galactic center at these wavelengths.
Combining these data with previous results at shorter wavelengths
(Viehmann and coworkers, Cat. J/A+A/433/117) enables us to construct
SEDs covering the H- to Q-band regions of the spectrum, i.e.,
1.6-19.5µm.
Description:
During the commissioning of the VISIR mid-infrared imager/spectrograph
at the ESO VLT (UT3, Melipal), the Galactic center was observed on
2004 May 7-11. Many narrowband filters spanning the whole N band
(8-13µm), as well as the 18.7 and 19.5µm (Δλ=0.88
and 0.40µm) filters in the Q band, were used.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 82 64 Extinction-corrected flux densities of compact
N-band sources
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See also:
J/A+A/433/117 : L- + M-band imaging of the Galactic Center (Viehmann+, 2005)
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- 2 I2 --- [VES2006] Sequential number ([VES2006] NN in Simbad)
3 A1 --- f_[VES2006] [c] Flag on [VES2006] (1)
5- 15 A11 --- OName Other name
16 A1 --- f_OName [c] Flag on OName (1)
18- 22 F5.2 arcsec oRA Right ascension offset (2)
24- 29 F6.2 arcsec oDE Declination offset (2)
31- 35 F5.2 Jy F1.6 ? 1.6µm flux density (3)
37- 40 F4.2 Jy F2.1 ? 2.1µm flux density (3)
42- 46 F5.2 Jy F3.8 ? 3.8µm flux density (3)
48- 52 F5.2 Jy F4.7 ? 4.7µm flux density (3)
54- 58 F5.2 Jy F8.6 8.6µm flux density (3)
60- 64 F5.2 Jy F11.3 ? 11.3µm flux density (3)
66- 70 F5.2 Jy F12.8 ? 12.8µm flux density (3)
72- 76 F5.2 Jy F18.7 ? 18.7µm flux density (3)
78- 82 F5.2 Jy F19.5 ? 19.5µm flux density (3)
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Note (1): A "c" indicates a lower luminosity bow shock source
(see Section 3.2.1).
Note (2): Position offsets are relative to IRS 7
(17:45:40.052-29:00:22.659, instead of -29 00 33.659 as indicated in
the paper); see Reid et al. 1999ApJ...524..816R 1999ApJ...524..816R, 2003ApJ...587..208R 2003ApJ...587..208R)
and are accurate to ±0.15".
Note (3): Photometry is accurate to ±30%, or ±50% for sources fainter
than 0.5Jy. The corresponding aperture size is approximately 1".
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History:
From electronic version of the journal
(End) Marianne Brouty [CDS] 20-Jul-2008