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Issue Astron. Astrophys. Suppl. Ser.
Volume 141, Number 2, January II 2000
Page(s) 313 - 317
DOI http://dx.doi.org/10.1051/aas:2000123

DOI: 10.1051/aas:2000123

Astron. Astrophys. Suppl. Ser. 141, 313-317

An absolute calibration of DENIS
(deep near infrared southern sky survey)

P. Fouqué 1,2 - L. Chevallier 2 - M. Cohen 3 - E. Galliano 2 - C. Loup 4 - C. Alard 15 - B. de Batz 5 - E. Bertin 4 - J. Borsenberger4 - M.R. Cioni 6 - E. Copet 1 - M. Dennefeld 4 - S. Derriere 7 - E. Deul 6 - P.-A. Duc 8 - D. Egret 7 - N. Epchtein 9 - T. Forveille 10 - F. Garzón 16 - H.J. Habing 6 - J. Hron 11 - S. Kimeswenger 12 - F. Lacombe 1 - T. Le Bertre 13 - G.A. Mamon 4,14 - A. Omont 4 - G. Paturel 17 - S. Pau 1 - P. Persi 18 - A.C. Robin 19 - D. Rouan 1 - M. Schultheis 4 - G. Simon 15 - D. Tiphène 1 - I. Vauglin 17 - S.J. Wagner 20

Send offprint request: P. Fouqué


1 - DESPA, Observatoire de Paris, 5 place J. Janssen, F-92195 Meudon Cedex, France
2 - European Southern Observatory, Casilla 19001, Santiago 19, Chile
3 - Radio Astronomy Laboratory, 601 Campbell Hall, University of California, Berkeley, CA 94720, U.S.A.
4 - Institut d'Astrophysique de Paris, 98 bis Bd. Arago, F-75014 Paris, France
5 - DASGAL, Observatoire de Paris, 5 place J. Janssen, F-92195 Meudon Cedex, France
6 - Leiden Observatory, University of Leiden, P.O. Box 9513, 2300 RA Leiden, The Netherlands
7 - CDS, Observatoire Astronomique de Strasbourg, UMR 7550, 11 rue de l'Université, F-67000 Strasbourg, France
8 - CEA, DSM, DAPNIA, Centre d'Études de Saclay, F-91191 Gif-sur-Yvette Cedex, France
9 - Observatoire de la Côte d'Azur, Département Fresnel, F-06304 Nice Cedex, France
10 - Observatoire de Grenoble, 414 rue de la Piscine, Domaine Universitaire de Saint Martin d'Hères, F-38041 Grenoble, France
11 - Institut für Astronomie der Universität Wien, Türkenschanzstrasse 17, A-1180 Wien, Austria
12 - Institut für Astronomie, Innsbruck University, A-6020 Innsbruck, Austria
13 - DEMIRM, Observatoire de Paris, 61 Av. de l'Observatoire, F-75014 Paris, France
14 - DAEC, Observatoire de Paris, 5 place J. Janssen, F-92195 Meudon Cedex, France
15 - DASGAL, Observatoire de Paris, 61 Av. de l'Observatoire, F-75014 Paris, France
16 - Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
17 - CRAL, Observatoire de Lyon, F-69561 Saint-Genis Laval Cedex, France
18 - Istituto di Astrofisica Spaziale, CNR, C.P. 67, I-00044 Frascati, Italy
19 - Observatoire de Besançon, BP. 1615, F-25010 Besançon Cedex, France
20 - Landessternwarte Heidelberg, Königstuhl, D-69117 Heidelberg, Germany
e-mail: pfouque@eso.org

Received June 24; accepted October 20, 1999

Abstract:

An absolute calibration of the DENIS photometric system is presented. It includes the determination of the overall transmission profiles in the 3 bands, namely i, J and $K_{\rm s}$, combining contributions from atmosphere, telescope mirrors, instrument lenses and dichroics, filters, and detectors. From these normalized profiles, isophotal and effective wavelengths are computed, using the same synthetic Vega spectrum as that used to support the absolute calibration of many other ground-based and spaceborne photometric systems. Flux densities at zero magnitude are derived and integrated to give in-band fluxes, which are used to compute theoretical zero-points and compare them to observed ones, yielding estimates of the overall throughput of the whole system.

Key words: surveys -- infrared: general -- instrumentation: miscellaneous

Copyright The European Southern Observatory (ESO)



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