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38 results on '"Da, Silva, Neto, D. N."'

1. Albedo and atmospheric constraints of dwarf planet Makemake from a stellar occultation

Author

Ortiz, J. L., Sicardy, B., Braga-Ribas, F., Alvarez-Candal, A., Lellouch, E., Duffard, R., Pinilla-Alonso, N., Ivanov, V. D., Littlefair, S. P., Camargo, J. I. B., Assafin, M., Unda-Sanzana, E., Jehin, E., Morales, N., Tancredi, G., Gil-Hutton, R., de la Cueva, I., Colque, J. P., Da Silva Neto, D. N., Manfroid, J., Thirouin, A., Gutiérrez, P. J., Lecacheux, J., Gillon, M., Maury, A., Colas, F., Licandro, J., Mueller, T., Jacques, C., Weaver, D., Milone, A., Salvo, R., Bruzzone, S., Organero, F., Behrend, R., Roland, S., Vieira-Martins, R., Widemann, T., Roques, F., Santos-Sanz, P., Hestroffer, D., Dhillon, V. S., Marsh, T. R., Harlingten, C., Bagatin, Campo A., Alonso, M. L., Ortiz, M., Colazo, C., Lima, H. J. F., Oliveira, A. S., Kerber, L. O., Smiljanic, R., Pimentel, E., Giacchini, B., Cacella, P., and Emilio, M.

Published
2012
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2. A Pluto-like radius and a high albedo for the dwarf planet Eris from an occultation

Author

Sicardy, B., Ortiz, J. L., Assafin, M., Jehin, E., Maury, A., Lellouch, E., Hutton, Gil R., Braga-Ribas, F., Colas, F., Hestroffer, D., Lecacheux, J., Roques, F., Santos-Sanz, P., Widemann, T., Morales, N., Duffard, R., Thirouin, A., Castro-Tirado, A. J., Jelínek, M., Kubánek, P., Sota, A., Sánchez-Ramírez, R., Andrei, A. H., Camargo, J. I. B., da Silva Neto, D. N., Gomes, Ramos A., Martins, Vieira R., Gillon, M., Manfroid, J., Tozzi, G. P., Harlingten, C., Saravia, S., Behrend, R., Mottola, S., Melendo, García E., Peris, V., Fabregat, J., Madiedo, J. M., Cuesta, L., Eibe, M. T., Ullán, A., Organero, F., Pastor, S., de los Reyes, J. A., Pedraz, S., Castro, A., de la Cueva, I., Muler, G., Steele, I. A., Cebrián, M., Montañés-Rodríguez, P., Oscoz, A., Weaver, D., Jacques, C., Corradi, W. J. B., Santos, F. P., Reis, W., Milone, A., Emilio, M., Gutiérrez, L., Vázquez, R., and Hernández-Toledo, H.

Published
2011
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3. Charon's size and an upper limit on its atmosphere from a stellar occultation

Author

Sicardy, B., Bellucci, A., Gendron, E., Lacombe, F., Lacour, S., Lecacheux, J., Lellouch, E., Renner, S., Pau, S., Roques, F., Widemann, T., Colas, F., Vachier, F., Vieira Martins, R., Ageorges, N., Hainaut, O., Marco, O., Beisker, W., Hummel, E., Feinstein, C., Levato, H., Maury, A., Frappa, E., Gaillard, B., Lavayssière, M., Di Sora, M., Mallia, F., Masi, G., Behrend, R., Carrier, F., Mousis, O., Rousselot, P., Alvarez-Candal, A., Lazzaro, D., Veiga, C., Andrei, A. H., Assafin, M., da Silva Neto, D. N., Jacques, C., Pimentel, E., Weaver, D., Lecampion, J.-F., Doncel, F., Momiyama, T., and Tancredi, G.

Published
2006

4. Parallaxes of Southern Extremely Cool objects III: 118 L and T dwarfs

Author

Smart, R L, primary, Bucciarelli, B, additional, Jones, H R A, additional, Marocco, F, additional, Andrei, A H, additional, Goldman, B, additional, Mendez, R A, additional, d’Avila, V A, additional, Burningham, B, additional, Camargo, J I B, additional, Crosta, M T, additional, Daprà, M, additional, Jenkins, J S, additional, Lachaume, R, additional, Lattanzi, M G, additional, Penna, J L, additional, Pinfield, D J, additional, da Silva Neto, D N, additional, Sozzetti, A, additional, and Vecchiato, A, additional

Published
2018
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5. The Gaia Initial Quasar Catalog

Author

Andrei, Alexandre Humberto, Antón, S., Taris, François, Bourda, G., Souchay, Jean, Bouquillon, Sébastien, Barache, Christophe, Osório, J. J. Pereira, Charlot, Patrick, Vieira Martins, Roberto, Lambert, Sébastien, Camargo, J. I. B., da Silva Neto, D. N., Assan, M., Le Campion, J.-F., Observatorio Nacional/MCT, Observatório Nacional/MCT, Observatório do Valongo, Universidade Federal do Rio de Janeiro Ladeira do Pedro Antônio, Faculdade de Ciências da Universidade do Porto (FCUP), Universidade do Porto, M2A 2014, Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB), Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Erosion torrentielle neige et avalanches (UR ETGR (ETNA)), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Universidade Estadual da Zona Oeste (UEZO), Universidade Estadual da Zona Oeste, Observatório do Valongo/UFRJ [Rio de Janeiro], Universidade Federal do Rio de Janeiro (UFRJ), Faculdade de Ciências da Universidade do Porto, PSL Research University (PSL)-PSL Research University (PSL)-Centre National de la Recherche Scientifique (CNRS), Universidade Federal do Rio de Janeiro [Rio de Janeiro] (UFRJ), Universidade do Porto = University of Porto, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), OATo/INAF, Systèmes de référence célestes, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Capitaine, Nicole

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], ComputingMilieux_MISCELLANEOUS, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract

International audience; We present the latest, updated, and fully corrected version of the Gaia Initial QSO Catalog (GIQC), produced by the CU3 GWP-S-335-13000. It contains 1 248 372 objects, of which 191 802 are considered and marked as Defining ones, because of their observational history and existence of spectroscopic redshift. Also objects with strong, calibrator-like radio emission are included in this category. The Defining objects represent a clean sample of quasars. The remaining objects aim to bring completeness to the GIQC at the time of its compilation. For the whole GIQC the average density is 30.3 sources per sq.deg., practically all sources have an indication of magnitude and of morphological indexes, and 90% of the sources have an indication of redshift and of variability indexes.

Published
2013

6. PRAIA - Platform for Reduction of Astronomical Images Automatically

Author

Assafin, M., Vieira Martins, R., Camargo, J. I. B., Alexandre Andrei, Da Silva Neto, D. N., Braga-Ribas, F., Observatório do Valongo/UFRJ [Rio de Janeiro], Universidade Federal do Rio de Janeiro (UFRJ), Observatório Nacional/MCT, Observatório do Valongo, Universidade Federal do Rio de Janeiro Ladeira do Pedro Antônio, Universidade Estadual da Zona Oeste (UEZO), Universidade Estadual da Zona Oeste, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Gaia Fun-SSO, and Institut De Mécanique Céleste Et De Calcul Des Éphémérides, Observatoire De Paris

Subjects
[PHYS.ASTR.SR] Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.SR] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
Abstract

4 p.; International audience; PRAIA performs high precision differential photometry and astrometry on digitized images (CCD frames, Schmidt plate surveys, etc). The package main characteristics are automation, accuracy and processing speed. Written in FORTRAN 77, it can run in scripts and interact with any visualization and analysis software. PRAIA is in cope with the ever growing amount of observational data available from private and public sources, including data mining and next generation fast telescope all sky surveys, like SDSS, Pan-STARRS and others. PRAIA was officially assigned as the astrometric supporting tool for participants in the GAIA-FUNSSO activities and will be freely available for the astronomical community.

Published
2010

7. Astrometry of the main satellites of Uranus: 18 years of observations

Author

Camargo, J. I. B., primary, Magalhães, F. P., additional, Vieira-Martins, R., additional, Assafin, M., additional, Braga-Ribas, F., additional, Dias-Oliveira, A., additional, Benedetti-Rossi, G., additional, Gomes-Júnior, A. R., additional, Andrei, A. H., additional, and da Silva Neto, D. N., additional

Published
2015
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8. Astrometric positions for 18 irregular satellites of giant planets from 23 years of observations

Author

Gomes-Júnior, A. R., primary, Assafin, M., additional, Vieira-Martins, R., additional, Arlot, J.-E., additional, Camargo, J. I. B., additional, Braga-Ribas, F., additional, da Silva Neto, D. N., additional, Andrei, A. H., additional, Dias-Oliveira, A., additional, Morgado, B. E., additional, Benedetti-Rossi, G., additional, Duchemin, Y., additional, Desmars, J., additional, Lainey, V., additional, and Thuillot, W., additional

Published
2015
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9. The PHEMU09 catalogue and astrometric results of the observations of the mutual occultations and eclipses of the Galilean satellites of Jupiter made in 2009

Author

Arlot, J. -E., Emelyanov, N., Varfolomeev, M. I., Amossé, A., Arena, C., Assafin, M., Barbieri, L., Bolzoni, S., Bragas-Ribas, F., Camargo, J. I. B., Casarramona, F., Casas, R., Christou, A., Colas, F., Collard, A., Combe, S., Constantinescu, M., Dangl, G., De, Cat, P., Degenhardt, S., Delcroix, M., Dias-Oliveira, A., Dourneau, G., Douvris, A., Druon, C., Ellington, C. K., Estraviz, G., Farissier, P., Farmakopoulos, A., Garlitz, J., Gault, D., George, T., Gorda, S. Y., Grismore, J., Guo, D. F., Herald, D., Ida, M., Ishida, M., Ivanov, A. V., Klemt, B., Koshkin, N., Le, Campion, J. F., Liakos, A., Liao, S. L., Li, S. N., Loader, B., Lopresti, C., Lo, Savio, E., Marchini, A., Marino, G., Masi, G., Massallé, A., Maulella, R., Mcfarland, J., Miyashita, K., Napoli, C., Noyelles, B., Pauwels, T., Pavlov, H., Peng, Q. Y., Perelló, C., Priban, V., Prost, J., Razemon, S., Rousselle, J. P., Rovira, J., Ruisi, R., Ruocco, N., Salvaggio, F., Sbarufatti, G., Shakun, L., Scheck, A., Sciuto, C., Da, Silva, Neto, D. N., V, Sinyaeva, N., Sofia, A., Sonka, A., Talbot, J., Tang, Z. H., Tejfel, V. G., Thuillot, W., Tigani, K., Timerson, B., Tontodonati, E., Tsamis, V., Unwin, M., Venable, R., Vieira-Martins, R., Vilar, J., Vingerhoets, P., Watanabe, H., Yin, H. X., Yu, Y., Zambelli, R., Arlot, J. -E., Emelyanov, N., Varfolomeev, M. I., Amossé, A., Arena, C., Assafin, M., Barbieri, L., Bolzoni, S., Bragas-Ribas, F., Camargo, J. I. B., Casarramona, F., Casas, R., Christou, A., Colas, F., Collard, A., Combe, S., Constantinescu, M., Dangl, G., De, Cat, P., Degenhardt, S., Delcroix, M., Dias-Oliveira, A., Dourneau, G., Douvris, A., Druon, C., Ellington, C. K., Estraviz, G., Farissier, P., Farmakopoulos, A., Garlitz, J., Gault, D., George, T., Gorda, S. Y., Grismore, J., Guo, D. F., Herald, D., Ida, M., Ishida, M., Ivanov, A. V., Klemt, B., Koshkin, N., Le, Campion, J. F., Liakos, A., Liao, S. L., Li, S. N., Loader, B., Lopresti, C., Lo, Savio, E., Marchini, A., Marino, G., Masi, G., Massallé, A., Maulella, R., Mcfarland, J., Miyashita, K., Napoli, C., Noyelles, B., Pauwels, T., Pavlov, H., Peng, Q. Y., Perelló, C., Priban, V., Prost, J., Razemon, S., Rousselle, J. P., Rovira, J., Ruisi, R., Ruocco, N., Salvaggio, F., Sbarufatti, G., Shakun, L., Scheck, A., Sciuto, C., Da, Silva, Neto, D. N., V, Sinyaeva, N., Sofia, A., Sonka, A., Talbot, J., Tang, Z. H., Tejfel, V. G., Thuillot, W., Tigani, K., Timerson, B., Tontodonati, E., Tsamis, V., Unwin, M., Venable, R., Vieira-Martins, R., Vilar, J., Vingerhoets, P., Watanabe, H., Yin, H. X., Yu, Y., and Zambelli, R.

Abstract

Context. In 2009, the Sun and the Earth passed through the equatorial plane of Jupiter and therefore the orbital planes of its main satellites. It was the equinox on Jupiter. This occurrence made mutual occultations and eclipses between the satellites possible. Experience has shown that the observations of such events provide accurate astrometric data able to bring new information on the dynamics of the Galilean satellites. Observations are made under the form of photometric measurements, but need to be made through the organization of a worldwide observation campaign maximizing the number and the quality of the data obtained. Aims. This work focuses on processing the complete database of photometric observations of the mutual occultations and eclipses of the Galilean satellites of Jupiter made during the international campaign in 2009. The final goal is to derive new accurate astrometric data. Methods. We used an accurate photometric model of mutual events adequate with the accuracy of the observation. Our original method was applied to derive astrometric data from photometric observations of mutual occultations and eclipses of the Galilean satellites of Jupiter. Results. We processed the 457 lightcurves obtained during the international campaign of photometric observations of the Galilean satellites of Jupiter in 2009. Compared with the theory, for successful observations, the r.m.s. of O-C residuals are equal to 45.8 mas and 81.1 mas in right ascension and declination, respectively; the mean O-C residuals are equal to -2 mas and -9 mas in right ascension and declination, respectively, for mutual occultations; and -6 mas and +1 mas in right ascension and declination, respectively, for mutual eclipses. © ESO, 2014.

Published
2014

10. The PHEMU09 catalogue and astrometric results of the observations of the mutual occultations and eclipses of the Galilean satellites of Jupiter made in 2009

Author

Arlot, J.-E., primary, Emelyanov, N., additional, Varfolomeev, M. I., additional, Amossé, A., additional, Arena, C., additional, Assafin, M., additional, Barbieri, L., additional, Bolzoni, S., additional, Bragas-Ribas, F., additional, Camargo, J. I. B., additional, Casarramona, F., additional, Casas, R., additional, Christou, A., additional, Colas, F., additional, Collard, A., additional, Combe, S., additional, Constantinescu, M., additional, Dangl, G., additional, De Cat, P., additional, Degenhardt, S., additional, Delcroix, M., additional, Dias-Oliveira, A., additional, Dourneau, G., additional, Douvris, A., additional, Druon, C., additional, Ellington, C. K., additional, Estraviz, G., additional, Farissier, P., additional, Farmakopoulos, A., additional, Garlitz, J., additional, Gault, D., additional, George, T., additional, Gorda, S. Yu., additional, Grismore, J., additional, Guo, D. F., additional, Herald, D., additional, Ida, M., additional, Ishida, M., additional, Ivanov, A. V., additional, Klemt, B., additional, Koshkin, N., additional, Le Campion, J. F., additional, Liakos, A., additional, Liao, S. L., additional, Li, S. N., additional, Loader, B., additional, Lopresti, C., additional, Lo Savio, E., additional, Marchini, A., additional, Marino, G., additional, Masi, G., additional, Massallé, A., additional, Maulella, R., additional, McFarland, J., additional, Miyashita, K., additional, Napoli, C., additional, Noyelles, B., additional, Pauwels, T., additional, Pavlov, H., additional, Peng, Q. Y., additional, Perelló, C., additional, Priban, V., additional, Prost, J., additional, Razemon, S., additional, Rousselle, J. P., additional, Rovira, J., additional, Ruisi, R., additional, Ruocco, N., additional, Salvaggio, F., additional, Sbarufatti, G., additional, Shakun, L., additional, Scheck, A., additional, Sciuto, C., additional, da Silva Neto, D. N., additional, V Sinyaeva, N., additional, Sofia, A., additional, Sonka, A., additional, Talbot, J., additional, Tang, Z. H., additional, Tejfel, V. G., additional, Thuillot, W., additional, Tigani, K., additional, Timerson, B., additional, Tontodonati, E., additional, Tsamis, V., additional, Unwin, M., additional, Venable, R., additional, Vieira-Martins, R., additional, Vilar, J., additional, Vingerhoets, P., additional, Watanabe, H., additional, Yin, H. X., additional, Yu, Y., additional, and Zambelli, R., additional

Published
2014
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11. Astrometric and photometric variability in quasars

Author

Alexandre Andrei, Bouquillon, S., Camargo, J. I. B., Penna, J. L., Taris, F., Souchay, J., Da Silva Neto, D. N., Vieira Martins, R., Assafin, M., Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Systèmes de référence célestes, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Soffel, M., Capitaine, and N.

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; Quasars are the choicest objects to define a quasi-inertial reference frame. At the same time they are active galactic nuclei powered by a massive black hole. As the astrometric precision approaches the limit set by the forthcoming GAIA mission, the astrometric stability can be investigated. Though the optical emission from the core region usually exceeds the other components by a factor of hundred, the variability of those components must surely imply in some measure of variability on the astrometric barycenter. To investigate the correlation between long term optical variability and what is dubbed as the random walk of the astrometric center, a program is being pursued at the WFI/ESO2.2m. A sample of quasars was selected by the large amplitude and long term optical variability. The observations are typically made every two months. The treatment is all differential, comparing the quasar position and brightness against a basket of selected stars for which the average relative distances and magnitudes remain constant. The provisional results for four objects bring strong support to the hypothesis of a degree of relationship between astrometric and photometric variability.

Published
2008

12. Pluto's Atmospheric Activity, Ephemeris Offset and Satellite Detections from Observations in 2007

Author

Sicardy, Bruno, Widemann, Thomas, Colas, François, Doressoundiram, Alain, Lecacheux, Jean, Vachier, Frédéric, Beisker, Wolfgang, Assafin, Marcelo, Camargo, J. I. B., da Silva Neto, D. N., Ribas, F. B., Andrei, A., Vieira Martins, Roberto, Behrend, Raoul, Hubbard, W. E., Larson, S., Marchis, Franck, Wong, Michael H., Severson, S., Dunham, David W., Warner, Brian D., Peterson, C., Molnar, L., George, T., Maley, Paul, Coziol, R., Choi, Y., Bath, Karl Ludwig, Kretlow, Mike, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Planétologie du LESIA, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Groupe Astrométrie et Planétologie (GAP), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2007

13. Astrometric Representation of the GAIA Extragalactic Reference Frame from Ground Observations

Author

Andrei, Alexandre Humberto, Fienga, Agnès, Schulteis, M., Assafin, Marcelo, Penna, J. L., da Silva Neto, D. N., Vieira Martins, Roberto, Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Astronomie et systèmes dynamiques (ASD), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Groupe Astrométrie et Planétologie (GAP)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2004

14. Probabilistic Representation of the Gaia Extragalactic Reference Frame

Author

Andrei, Alexandre Humberto, Fienga, Agnès, Schulteis, M., Slezak, Eric, Assafin, Marcelo, Penna, J. L., da Silva Neto, D. N., Vieira Martins, Roberto, Soares Musumeci, P., Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Astronomie et systèmes dynamiques (ASD), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Groupe Astrométrie et Planétologie (GAP)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2004

15. Veron & Veron Based Extragalactic Reference Frame

Author

Andrei, Alexandre Humberto, Fienga, Agnès, Assafin, Marcelo, Penna, J. L., Schulteis, M., da Silva Neto, D. N., Vieira Martins, Roberto, Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Astronomie et systèmes dynamiques (ASD), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Groupe Astrométrie et Planétologie (GAP)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2004

16. The Large Quasar Reference Frame (LQRF). An Optical Representation of the ICRS

Author

NATIONAL OBSERVATORY (BRAZIL), Andrei, A. H., Souchay, J., Zacharias, N., Smart, R. L., Martins, R. V., da Silva Neto, D. N., Camargo, J. I., Assafin, M., Barache, C., Bouquillon, S., Penna, J. L., Taris, F., NATIONAL OBSERVATORY (BRAZIL), Andrei, A. H., Souchay, J., Zacharias, N., Smart, R. L., Martins, R. V., da Silva Neto, D. N., Camargo, J. I., Assafin, M., Barache, C., Bouquillon, S., Penna, J. L., and Taris, F.

Abstract

The large number and all-sky distribution of quasars from different surveys, along with their presence in large, deep astrometric catalogs, enables us to build of an optical materialization of the International Celestial Reference System (ICRS) following its defining principles. Namely: that it is kinematically non-rotating with respect to the ensemble of distant extragalactic objects; aligned with the mean equator and dynamical equinox of J2000; and realized by a list of adopted coordinates of extragalatic sources. Aims. The Large Quasar Reference Frame (LQRF) was built with the care of avoiding incorrect matches of its constituents quasars, homogenizing the astrometry from the different catalogs and lists in which the constituent quasars are gathered, and attaining a milli-arcsec global alignment with the International Celestial Reference Frame (ICRF), as well as typical individual source position accuracies higher than 100 milli-arcsec. The LQRF contains J2000 referred equatorial coordinates, and is complemented by redshift and photometry information from the LQAC. It is designed to be an astrometric frame, but it is also the basis for the GAIA mission initial quasars' list, and can be used as a test bench for quasars' space distribution and luminosity function studies. The LQRF is meant to be updated when new quasar identifications and newer versions of the astrometric frames used are realized. In the later case, it can itself be used to examine the relations between those frames., Published in Astronomy and Astrophysics, v505 n1 p385-404, Oct 2009. Prepared in collaboration with Observatorio do Valongo/UFRJ, Brazil; Observatoire de Paris/SYRTE, France; US Naval Observatory, Washington, DC; INAF/Osservatorio Astronomico di Torino, Italy, and Centro Universitario Estadual da Zona Oeste, Brazil.

Published
2009

17. Analysis of 25 mutual eclipses and occultations between the Galilean satellites observed from Brazil in 2009★

Author

Dias-Oliveira, A., primary, Vieira-Martins, R., additional, Assafin, M., additional, Camargo, J. I. B., additional, Braga-Ribas, F., additional, da Silva Neto, D. N., additional, Gaspar, H. S., additional, Pires dos Santos, P. M., additional, Domingos, R. C., additional, Boldrin, L. A. G., additional, Izidoro, A., additional, Carvalho, J. P. S., additional, Sfair, R., additional, Sampaio, J. C., additional, and Winter, O. C., additional

Published
2013
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19. Astrometric results of observations of mutual occultations and eclipses of the Saturnian satellites in 2009

Author

Arlot, J.-E., primary, Emelyanov, N. V., additional, Lainey, V., additional, Andreev, M., additional, Assafin, M., additional, Braga-Ribas, F., additional, Camargo, J. I. B., additional, Casas, R., additional, Christou, A., additional, Colas, F., additional, Da Silva Neto, D. N., additional, Dechambre, O., additional, Dias-Oliveira, A., additional, Dourneau, G., additional, Farmakopoulos, A., additional, Gault, D., additional, George, T., additional, Gorshanov, D. L., additional, Herald, D., additional, Kozlov, V., additional, Kurenya, A., additional, Le Campion, J. F., additional, Lecacheux, J., additional, Loader, B., additional, Massallé, A., additional, Mc Brien, M., additional, Murphy, A., additional, Parakhin, N., additional, Roman-Lopes, A., additional, Schnabel, C., additional, Sergeev, A., additional, Tsamis, V., additional, Valdés Sada, P., additional, Vieira-Martins, R., additional, and Zhang, X., additional

Published
2012
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22. CONSTRAINTS ON CHARON'S ORBITAL ELEMENTS FROM THE DOUBLE STELLAR OCCULTATION OF 2008 JUNE 22

Author

Sicardy, B., primary, Bolt, G., additional, Broughton, J., additional, Dobosz, T., additional, Gault, D., additional, Kerr, S., additional, Bénard, F., additional, Frappa, E., additional, Lecacheux, J., additional, Peyrot, A., additional, Teng-Chuen-Yu, J.-P., additional, Beisker, W., additional, Boissel, Y., additional, Buckley, D., additional, Colas, F., additional, de Witt, C., additional, Doressoundiram, A., additional, Roques, F., additional, Widemann, T., additional, Gruhn, C., additional, Batista, V., additional, Biggs, J., additional, Dieters, S., additional, Greenhill, J., additional, Groom, R., additional, Herald, D., additional, Lade, B., additional, Mathers, S., additional, Assafin, M., additional, Camargo, J. I. B., additional, Vieira-Martins, R., additional, Andrei, A. H., additional, da Silva Neto, D. N., additional, Braga-Ribas, F., additional, and Behrend, R., additional

Published
2011
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23. PARALLAXES OF SOUTHERN EXTREMELY COOL OBJECTS. I. TARGETS, PROPER MOTIONS, AND FIRST RESULTS

Author

Andrei, A. H., primary, Smart, R. L., additional, Penna, J. L., additional, d'Avila, V. A., additional, Bucciarelli, B., additional, Camargo, J. I. B., additional, Crosta, M. T., additional, Daprà, M., additional, Goldman, B., additional, Jones, H. R. A., additional, Lattanzi, M. G., additional, Nicastro, L., additional, Pinfield, D. J., additional, da Silva Neto, D. N., additional, and Teixeira, R., additional

Published
2011
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25. Astrometric and Photometric Variability in Quasars

Author

Andrei, A. H., primary, Bouquillon, S., additional, Penna, J. L., additional, Taris, F., additional, Anton, S., additional, Souchay, J., additional, Camargo, J. I. B., additional, da Silva Neto, D. N., additional, Vieira Martins, R., additional, Assafin, M., additional, and Pinto, S. dos Reis Carvalho, additional

Published
2009
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26. The large quasar reference frame (LQRF)

Author

Andrei, A. H., primary, Souchay, J., additional, Zacharias, N., additional, Smart, R. L., additional, Vieira Martins, R., additional, da Silva Neto, D. N., additional, Camargo, J. I. B., additional, Assafin, M., additional, Barache, C., additional, Bouquillon, S., additional, Penna, J. L., additional, and Taris, F., additional

Published
2009
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30. A Gaia oriented analysis of a large sample of quasars

Author

Andrei, A. H., primary, Assafin, M., additional, Barache, C., additional, Bouquillon, S., additional, Bourda, G., additional, Camargo, J. I. B., additional, le Campion, J.-F., additional, Charlot, P., additional, Gontier, A.-M., additional, Lambert, S., additional, Osório, J. J. Pereira, additional, da Silva Neto, D. N., additional, Souchay, J., additional, and Martins, R. Vieira, additional

Published
2007
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38. Pluto Atmospheric Activity, Ephemeris Offset and Charon Orbital Radius Constrained by Stellar Occultations

Author

Sicardy, Bruno, Boissel, Y., Colas, F., Roques, F., Widemann, T., Assafin, M., Camargo, J. I. B., Da Silva Neto, D. N., Ribas, F. B., Vieira Martins, R., Alexandre Andrei, Behrend, R., Beisker, W., Herald, D., Bolt, G., Broughton, J., Dobosz, T., Gault, D., Groom, R., Kerr, S., Anderson, P., Batista, V., Blair, L., Greenhill, J., Frappa, E., Benard, F., Teng, J. P., Gruhn, C., Blanchard, G., Castets, M., Institut de RadioAstronomie Millimétrique (IRAM), Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Observatório do Valongo, Universidade Federal do Rio de Janeiro, Obs. Nacional, Brazil, Obs. Geneve, Switzerland, International Occultation Timing Association, European Section (IOTA/ES), Amateur Australia, Australia, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Stockport Observatory, Univ. Tasmania, Australia, Euraster, Observatoire astronomique des Makes, University of Namibia, European Southern Observatory, Association T60, Observatoire Midi-Pyrénées, Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; We have pursued in 2008 our observing program of stellar occultations by Pluto and its satellites. This program started in 2002, and revealed a two-fold increase of Pluto atmospheric pressure between 1988 and 2002. Various occultations observed in 2006 and 2007 did not reveal any further increase in pressure. Also, a measure of Charon's radius was made using an occultation observed on 11 July 2005.

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