Zobrazeno 1 - 10
of 265
pro vyhledávání: '"Baer, P E"'
Autor:
Solano, Enrique, Marcy, Geoffrey W., Villarroel, Beatriz, Geier, Stefan, Streblyanska, Alina, Lombardi, Gianluca, Bär, Rudolf E., Andruk, Vitaly N.
We report on three optically bright, ~15th mag, point-sources within 10 arcsec of each other that vanished within 1 hour, based on two consecutive exposures at Palomar Observatory on 1952 July 19 (POSS I Red and Blue). The three point-sources have co
Externí odkaz:
http://arxiv.org/abs/2310.09035
Autor:
Caglar, Turgay, Koss, Michael J., Burtscher, Leonard, Trakhtenbrot, Benny, Erdim, M. Kiyami, Mejía-Restrepo, Julian E., Ricci, Federica, Powell, Meredith C., Ricci, Claudio, Mushotzky, Richard, Bauer, Franz E., Ananna, Tonima T., Bär, Rudolf E., Brandl, Bernhard, Brinchmann, Jarle, Harrison, Fiona, Ichikawa, Kohei, Kakkad, Darshan, Oh, Kyuseok, Riffel, Rogério, Sartori, Lia F., Smith, Krista L., Stern, Daniel, Urry, C. Megan
We present two independent measurements of stellar velocity dispersions ( $\sigma_\rm{\star}$ ) from the Ca\,H+K \& Mg\,\textsc{i} region (3880--5550~\AA) and the Calcium Triplet region (CaT, 8350--8750~\AA) for 173 hard X-ray-selected Type 1 AGNs ($
Externí odkaz:
http://arxiv.org/abs/2308.01800
Autor:
Villarroel, Beatriz, Solano, Enrique, Guergouri, Hichem, Streblyanska, Alina, Mattsson, Lars, Bär, Rudolf E., Mimouni, Jamal, Geier, Stefan, Gupta, Alok C., Okororie, Vanessa, Laggoune, Khaoula, Shultz, Matthew E., Freitas Jr., Robert A., Ward, Martin J.
Old, digitized astronomical images taken before the human spacefaring age offer a unique view of the sky devoid of known artificial satellites. In this paper, we have carried out the first optical searches ever for non-terrestrial artifacts near the
Externí odkaz:
http://arxiv.org/abs/2204.06091
Autor:
Oh, Kyuseok, Koss, Michael J., Ueda, Yoshihiro, Stern, Daniel, Ricci, Claudio, Trakhtenbrot, Benny, Powell, Meredith C., Brok, Jakob S. Den, Lamperti, Isabella, Mushotzky, Richard, Ricci, Federica, Bär, Rudolf E., Rojas, Alejandra F., Ichikawa, Kohei, Riffel, Rogerio, Treister, Ezequiel, Harrison, Fiona, Urry, C. Megan, Bauer, Franz E., Schawinski, Kevin
We present the second catalog and data release of optical spectral line measurements and AGN demographics of the BAT AGN Spectroscopic Survey, which focuses on the of Swift-BAT hard X-ray detected AGNs. We use spectra from dedicated campaigns and pub
Externí odkaz:
http://arxiv.org/abs/2203.00017
Autor:
Villarroel, Beatriz, Pelckmans, Kristiaan, Solano, Enrique, Laaksoharju, Mikael, Souza, Abel, Dom, Onyeuwaoma Nnaemeka, Laggoune, Khaoula, Mimouni, Jamal, Guergouri, Hichem, Mattsson, Lars, García, Aurora Lago, Soodla, Johan, Castillo, Diego, Shultz, Matthew E., Aworka, Rubby, Comerón, Sébastien, Geier, Stefan, Marcy, Geoffrey, Gupta, Alok C., Bergstedt, Josefine, Bär, Rudolf E., Buelens, Bart, Enriquez, Emilio, Mellon, Christopher K., Prieto, M. Almudena, Wamalwa, Dismas Simiyu, de Souza, Rafael S., Ward, Martin J.
Publikováno v:
Universe, 2022, vol. 8, issue 11, p. 561
The Vanishing & Appearing Sources during a Century of Observations (VASCO) project investigates astronomical surveys spanning a time interval of 70 years, searching for unusual and exotic transients. We present herein the VASCO Citizen Science Projec
Externí odkaz:
http://arxiv.org/abs/2009.10813
Autor:
Villarroel, Beatriz, Soodla, Johan, Comerón, Sébastien, Mattsson, Lars, Pelckmans, Kristiaan, López-Corredoira, Martín, Krisciunas, Kevin, Guerras, Eduardo, Kochukhov, Oleg, Bergstedt, Josefine, Buelens, Bart, Bär, Rudolf E., Cubo, Rubén, Enriquez, J. Emilio, Gupta, Alok C., Imaz, Iñigo, Karlsson, Torgny, Prieto, M. Almudena, Shlyapnikov, Aleksey A., de Souza, Rafael S., Vavilova, Irina B., Ward, Martin J.
In this paper we report the current status of a new research program. The primary goal of the "Vanishing & Appearing Sources during a Century of Observations" (VASCO) project is to search for vanishing and appearing sources using existing survey data
Externí odkaz:
http://arxiv.org/abs/1911.05068
Autor:
Bär, Rudolf E., Trakhtenbrot, Benny, Oh, Kyuseok, Koss, Michael J., Wong, O. Ivy, Ricci, Claudio, Schawinski, Kevin, Weigel, Anna K., Sartori, Lia F., Ichikawa, Kohei, Secrest, Nathan J., Stern, Daniel, Pacucci, Fabio, Mushotzky, Richard, Powell, Meredith C., Ricci, Federica, Sani, Eleonora, Smith, Krista L., Harrison, Fiona A., Lamperti, Isabella, Urry, C. Megan
We present a multi wavelength analysis of 28 of the most luminous low-redshift narrow-line, ultra-hard X-ray selected active galactic nuclei (AGN) drawn from the 70 month Swift/BAT all-sky survey, with bolometric luminosities of log(L_bol/erg/s) > 45
Externí odkaz:
http://arxiv.org/abs/1908.07546
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