Zobrazeno 1 - 10
of 612
pro vyhledávání: '"Echevarria J"'
We report the first radial velocity spectroscopic study of the eclipsing period bouncer SDSS J105754.25+275947.5. Together with eclipse light curve modeling, we redetermined the system parameters and studied the accretion disk structure. We confirm t
Externí odkaz:
http://arxiv.org/abs/2310.00909
We present new optical spectroscopic observations of U Geminorum obtained during a quiescent stage. We performed a radial velocity analysis of three Balmer emission lines yielding inconsistent results. Assuming that the radial velocity semi amplitude
Externí odkaz:
http://arxiv.org/abs/2303.05625
We present new observations of the cataclysmic variable DW Cancri, after the system recovered from a low state. We performed a power spectrum analysis that reveals a clear signal of the 38 min spin period in our photometric data. Our spectroscopic po
Externí odkaz:
http://arxiv.org/abs/2112.03433
Autor:
Castro, A., Zavala, I., Colorado, E., Herrera, J., Castro Segura, N., Michel, R., Altamirano, D., Altamirano-Dévora, L., Sierra, G., Echevarría, J., Hernández-Landa, J.
Publikováno v:
In Astronomy and Computing January 2024 46
Autor:
Echevarría, J., Santisteban, J. V. Hernández, Montero, O. Segura, Ramírez, S. H., Ruelas-Mayorga, A., Sánchez, L. J., Michel, R., Costero, R., González-Buitrago, D. H., Olivares, J.
Spectroscopic observations of AH Herculis during a deep quiescent state are put forward. We found the object in a rare long minima, allowing us to derive accurately the semi-amplitudes: $K_1 =121 \pm \, 4$ \kms\ and $K_2 =152 \pm 2$ \kms\ and its mas
Externí odkaz:
http://arxiv.org/abs/2011.08310
Publikováno v:
2020 10.1093/mnras/staa856
We present extensive radial-velocity observations of the intermediate polar DW Cnc during its 2018-2019 low state. We show that the 86 min signal, associated with the orbital period is strong in our radial velocity analysis, power spectrum search, as
Externí odkaz:
http://arxiv.org/abs/2003.12498
Autor:
D'Ammando, F., Raiteri, C. M., Villata, M., Acosta-Pulido, J. A., Agudo, I., Arkharov, A. A., Bachev, R., Baida, G. V., Benitez, E., Borman, G. A., Boschin, W., Bozhilov, V., Butuzova, M. S., Calcidese, P., Carnerero, M. I., Carosati, D., Casadio, C., Castro-Segura, N., Chen, W. -P., Damljanovic, G., Di Paola, A., Echevarria, J., Efimova, N. V., Ehgamberdiev, Sh. A., Espinosa, C., Fuentes, A., Giunta, A., Gomez, J. L., Grishina, T. S., Gurwell, M. A., Hiriart, D., Jermak, H., Jordan, B., Jorstad, S. G., Joshi, M., Kimeridze, G. N., Kopatskaya, E. N., Kuratov, K., Kurtanidze, O. M., Kurtanidze, S. O., Lahteenmaki, A., Larionov, V. M., Larionova, E. G., Larionova, L. V., Lazaro, C., Lin, C. S., Malmrose, M. P., Marscher, A. P., Matsumoto, K., McBreen, B., Michel, R., Mihov, B., Minev, M., Mirzaqulov, D. O., Molina, S. N., Moody, J. W., Morozova, D. A., Nazarov, S. V., Nikiforova, A. A., Nikolashvili, M. G., Ohlert, J. M., Okhmat, N., Ovcharov, E., Pinna, F., Polakis, T. A., Protasio, C., Pursimo, T., Redondo-Lorenzo, F. J., Rizzi, N., Rodriguez-Coira, G., Sadakane, K., Sadun, A. C., Samal, M. R., Savchenko, S. S., Semkov, E., Sigua, L., Skiff, B. A., Slavcheva-Mihova, L., Smith, P. S., Steele, I. A., Strigachev, A., Tammi, J., Thum, C., Tornikoski, M., Troitskaya, Yu. V., Troitsky, I. S., Vasilyev, A. A., Vince, O., Hovatta, T., Kiehlmann, S., Max-Moerbeck, W., Readhead, A. C. S., Reeves, R., Pearson, T. J., Mufakharov, T., Sotnikova, Yu. V., Mingaliev, M. G.
We present a multiwavelength study of the flat-spectrum radio quasar CTA 102 during 2013-2017. We use radio-to-optical data obtained by the Whole Earth Blazar Telescope, 15 GHz data from the Owens Valley Radio Observatory, 91 and 103 GHz data from th
Externí odkaz:
http://arxiv.org/abs/1910.03609
Autor:
Castro, A., Altamirano, D., Michel, R., Gandhi, P., Santisteban, J. V. Hernández, Echevarría, J., Tejada, C., Knigge, C., Sierra, G., Colorado, E., Hernández-Landa, J., Whiter, D., Middleton, M., García, B., Guisa, G., Castro-Segura, N.
We report the development of a high-time resolution, 3-colour, simultaneous optical imaging system for the 2.1 m telescope in San Pedro M\'artir Observatory, M\'exico. OPTICAM will be equipped with three Andor Zyla 4.2-Plus sCMOS cameras and a set of
Externí odkaz:
http://arxiv.org/abs/1908.05785
Autor:
Santisteban, J. V. Hernández, Echevarría, J., Zharikov, S., Neustroev, V., Tovmassian, G., Chavushyan, V., Napiwotzki, R., Costero, R., Michel, R., Sánchez, L. J., Ruelas-Mayorga, A., Olguín, L., García-Díaz, Ma. T., González-Buitrago, D., de Miguel, E., de la Fuente, E., de Anda, R., Suleimanov, V.
We analyse new optical spectroscopic, direct-image and X-ray observations of the recently discovered a high proper motion cataclysmic variable V1838 Aql. The data were obtained during its 2013 superoutburst and its subsequent quiescent state. An exte
Externí odkaz:
http://arxiv.org/abs/1811.02349
Autor:
Echevarría, J., de Miguel, E., Santisteban, J. V. Hernández, Michel, R., Costero, R., Sánchez, L. J., Ruelas-Mayorga, A., Olivares, J., González-Buitrago, D., Jones, J. L., Oskanen, A., Goff, W., Ulowetz, J., Bolt, G., Sabo, R., Hambsch, F. -J, Slauson, D., Stein, W.
We present an in-depth photometric study of the 2013 superoutburst of the recently discovered cataclysmic variable V1838 Aql and subsequent photometry near its quiescent state. A careful examination of the development of the superhumps is presented.
Externí odkaz:
http://arxiv.org/abs/1810.09864