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Issue A&A
Volume 390, Number 3, August II 2002
Page(s) L19 - L22
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20020893



A&A 390, L19-L22 (2002)
DOI: 10.1051/0004-6361:20020893

Letter

147 GHz VLBI observations: Detection of 3C 273 and 3C 279 on the 3100 km baseline Metsähovi - Pico Veleta

A. Greve1, P. Könönen2, D. A. Graham3, K. Wiik4, 2, T. P. Krichbaum3, J. Conway5, F. Rantakyrö6, S. Urpo2, M. Grewing1, R. S. Booth5, J. A. Zensus3, D. John7, S. Navarro7, A. Mujunen2, J. Ritakari2, J. Peltonen2, P. Sjöman2, E. Oinaskallio2 and M. Berton1

1  IRAM, 300 rue de la Piscine, 38406 St. Martin d'Hères, France
2  Metsähovi Radio Observatory, Metsähovintie 114, 02540 Kylmälä, Finland
3  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
4  Tuorla Observatory, Väisäläintie 20, 21500 Piikkiö, Finland
5  Onsala Space Observatory, 43920 Onsala, Sweden
6  ESO, Casilla 19001, Santiago 19, Chile & Observatorio Cerro Calan, Universidad de Chile, Santiago, Chile
7  IRAM, Nucleo Central, Avenida Divina Pastora 7, 18102 Granada, Spain

(Received 8 April 2002 / Accepted 12 June 2002)

Abstract
We report a successful VLBI observation at 147 GHz (2.1 mm) on the 3 100 km long baseline between the telescopes at Metsähovi (Finland) and Pico Veleta (Spain). The sources 3C 273B and 3C 279 were detected with a SNR of . For these sources we estimate that 25-30% of the total flux is detectable as correlated flux on the 3 100 km baseline, which gives at 147 GHz a lower limit of the brightness temperature of the inner VLBI jet region of ~1 $\times$10 10 K.


Key words: mm VLBI -- galaxies: quasars -- galaxies: individual: 3C 273B, 3C 279

Offprint request: A. Greve, greve@iram.fr

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© ESO 2002


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