Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Du, Y. Le"'
Autor:
Ansari, R., Auriere, M., Baillon, P., Bouquet, A., Coupinot, G., Coutures, Ch., Ghesquiere, C., Giraud-Heraud, Y., Gillieron, D., Gondolo, P., Hecquet, J., Kaplan, J., Kim, A., Du, Y. Le, Melchior, A. L., Moniez, M., Picat, J. P., Soucail, G.
Publikováno v:
Astron.Astrophys. 421 (2004) 509-518
We present the AGAPE astrometric and photometric catalogue of 1579 variable stars in a 14'x10' field centred on M31. This work is the first survey devoted to variable stars in the bulge of M31. The R magnitudes of the objects and the B-R colours sugg
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405402
Publikováno v:
Mon.Not.Roy.Astron.Soc. 352 (2004) 233
Automatic classification of variability is now possible with tools like neural networks. Here, we present two neural networks for the identification of microlensing events -- the first discriminates against variable stars and the second against super
Externí odkaz:
http://arxiv.org/abs/astro-ph/0404232
Autor:
Paulin-Henriksson, S., Baillon, P., Bouquet, A., Carr, B. J., Creze, M., Evans, N. W., Giraud-Heraud, Y., Gould, A., Hewett, P., Kaplan, J., Kerins, E., Du, Y. Le, Melchior, A. -L., Smartt, S. J., Valls-Gabaud, D.
We have carried out a survey of the Andromeda galaxy for unresolved microlensing (pixel lensing). We present a subset of four short timescale, high signal-to-noise microlensing candidates found by imposing severe selection criteria: the source flux v
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207025
Autor:
Paulin-Henriksson, S., Baillon, P., Bouquet, A., Carr, B. J., Creze, M., Evans, N. W., Giraud-Heraud, Y., Gould, A., Hewett, P., Kaplan, J., Kerins, E., Du, Y. Le, Melchior, A. -L., Smartt, S. J., Valls-Gabaud, D., collaboration, the POINT-AGAPE
Publikováno v:
Astrophys.J.576:L121-L124,2002
We report the discovery of a microlensing candidate projected 2'54" from the center of M32, on the side closest to M31. The blue color (R-I= 0.00 +/- 0.14) of the source argues strongly that it lies in the disk of M31, while the proximity of the line
Externí odkaz:
http://arxiv.org/abs/astro-ph/0206387
Autor:
Novati, S. Calchi, Iovane, G., Marino, A. A., Auriere, M., Baillon, P., Bouquet, A., Bozza, V., Capaccioli, M., Capozziello, S., Cardone, V., Covone, G., De Paolis, F., de Ritis, R., Giraud-Heraud, Y., Gould, A., Ingrosso, G., Jetzer, Ph., Kaplan, J., Lambiase, G., Du, Y. Le, Mancini, L., Piedipalumbo, E., Re, V., Roncadelli, M., Rubano, C., Scarpetta, G., Scudellaro, P., Sereno, M., Strafella, F.
Publikováno v:
Astron.Astrophys. 381 (2002) 848-861
We present the first results of the analysis of data collected during the 1998-99 observational campaign at the 1.3 meter McGraw-Hill Telescope, towards the Andromeda galaxy (M31), aimed to the detection of gravitational microlensing effects as a pro
Externí odkaz:
http://arxiv.org/abs/astro-ph/0110706
Autor:
Auriere, M., Baillon, P., Bouquet, A., Carr, B. J., Creze, M., Evans, N. W., Giraud-Heraud, Y., Gould, A., Hewett, P., Kaplan, J., Kerins, E., Lastennet, E., Du, Y. Le, Melchior, A. -L., Paulin-Henriksson, S., Smartt, S. J., Valls-Gabaud, D.
We report the discovery of a short-duration microlensing candidate in the northern field of the POINT-AGAPE pixel lensing survey towards M31. The full-width half-maximum timescale is very short, just 1.8 days. Almost certainly, the source star has be
Externí odkaz:
http://arxiv.org/abs/astro-ph/0102080
Autor:
Kerins, E., Carr, B. J., Evans, N. W., Hewett, P., Lastennet, E., Du, Y. Le, Melchior, A. -L., Smartt, S. J., Valls-Gabaud, D.
Publikováno v:
Mon.Not.Roy.Astron.Soc.323:13,2001
POINT-AGAPE is an Anglo-French collaboration which is employing the Isaac Newton Telescope (INT) to conduct a pixel-lensing survey towards M31. In this paper we investigate what we can learn from pixel-lensing observables about the MACHO mass and fra
Externí odkaz:
http://arxiv.org/abs/astro-ph/0002256
Autor:
Ansari, R., Auriere, M., Baillon, P., Bouquet, A., Coupinot, G., Coutures, Ch., Ghesquiere, C., Giraud-Heraud, Y., Gondolo, P., Hecquet, J., Kaplan, J., Kim, A., Du, Y. Le, Melchior, A. L., Moniez, M., Picat, J. P., Soucail, G.
AgapeZ1 is the brightest and the shortest duration microlensing candidate event found in the Agape data. It occured only 42" from the center of M31. Our photometry shows that the half intensity duration of the event6 is 4.8 days and at maximum bright
Externí odkaz:
http://arxiv.org/abs/astro-ph/9812334
Autor:
Gondolo, P., Ansari, R., Auriere, M., Baillon, P., Bouquet, A., Coupinot, G., Coutures, Ch., Ghesquiere, C., Giraud-Heraud, Y., Hecquet, J., Kaplan, J., Du, Y. Le, Melchior, A. L., Moniez, M., Picat, J. P., Soucail, G.
AGAPE is an observational search of massive compact halo objects (MACHOs) in the direction of M31 by means of a novel method: the gravitational microlensing of unresolved stars. The search consists in examining CCD pixel light curves for microlensing
Externí odkaz:
http://arxiv.org/abs/astro-ph/9610010
Autor:
Ansari, R., Aurière, M., Baillon, P., Bouquet, A., Coupinot, G., Coutures, Ch., Ghesquière, C., Giraud-Héraud, Y., Gondolo, P., Hecquet, J., Kaplan, J., Du, Y. Le, Melchior, A. L., Moniez, M., Picat, J. P., Soucail, G.
Publikováno v:
Astron.Astrophys.324:843-856,1997
M31 is a very tempting target for a microlensing search of compact objects in galactic haloes. It is the nearest large galaxy, it probably has its own dark halo, and its tilted position with respect to the line of sight provides an unmistakable signa
Externí odkaz:
http://arxiv.org/abs/astro-ph/9607040