Zobrazeno 1 - 10
of 392
pro vyhledávání: '"Hernández-Garcia L"'
Autor:
Hernández-García, L., Muñoz-Arancibia, A. M., Lira, P., Bruni, G., Cuadra, J., Arévalo, P., Sánchez-Sáez, P., Bernal, S., Bauer, F. E., Catelan, M., Panessa, F., Pávez-Herrera, M., Ricci, C., Reyes-Jainaga, I., Ailawadhi, B., Chavushyan, V., Dastidar, R., Deconto-Machado, A., Förster, F., Gangopadhyay, A., García-Pérez, A., Márquez, I., Masegosa, J., Misra, K., Patiño-Alvarez, V. M, Puig-Subirà, M., Rodi, J., Singh, M.
With a growing number of facilities able to monitor the entire sky and produce light curves with a cadence of days, in recent years there has been an increased rate of detection of sources whose variability deviates from standard behavior, revealing
Externí odkaz:
http://arxiv.org/abs/2411.08949
Autor:
Sun, Tian-Rui, Geng, Jin-Jun, Yan, Jing-Zhi, Hu, You-Dong, Wu, Xue-Feng, Castro-Tirado, Alberto J., Yang, Chao, Ping, Yi-Ding, Hu, Chen-Ran, Xu, Fan, Gao, Hao-Xuan, Jiang, Ji-An, Zhu, Yan-Tian, Xue, Yongquan, Pérez-García, Ignacio, Wu, Si-Yu, Fernández-García, Emilio, Caballero-García, María D., Sánchez-Ramírez, Rubén, Guziy, Sergiy, Olivares, Ignacio, del Pulgar, Carlos Jesus Pérez, Castellón, A., Castillo, Sebastián, Xiong, Ding-Rong, Pandey, Shashi B., Hiriart, David, García-Segura, Guillermo, Lee, William H., Carrasco-García, I. M., Park, Il H., Meintjes, Petrus J., van Heerden, Hendrik J., Martín-Carrillo, Antonio, Hanlon, Lorraine, Zhang, Bin-Bin, Maury, Alain, Hernández-García, L., Gritsevich, Maria, Rossi, Andrea, Maiorano, Elisabetta, Cusano, Felice, D'Avanzo, Paolo, Ferro, Matteo, Melandri, Andrea, De Pasquale, Massimiliano, Brivio, Riccardo, Fang, Min, Fan, Lu-Lu, Hu, Wei-Da, Wan, Zhen, Hu, Lei, Zuo, Ying-Xi, Tang, Jin-Long, Zhang, Xiao-Ling, Zheng, Xian-Zhong, Li, Bin, Luo, Wen-Tao, Liu, Wei, Wang, Jian, Zhang, Hong-Fei, Liu, Hao, Gao, Jie, Liang, Ming, Wang, Hai-Ren, Yao, Da-Zhi, Cheng, Jing-Quan, Zhao, Wen, Dai, Zi-Gao
Thanks to the rapidly increasing time-domain facilities, we are entering a golden era of research on gamma-ray bursts (GRBs). In this Letter, we report our observations of GRB 240529A with the Burst Optical Observer and Transient Exploring System, th
Externí odkaz:
http://arxiv.org/abs/2409.17983
Autor:
Cazzoli, S., Hernández-García, L., Márquez, I., Masegosa, J., Bruni, G., Panessa, F., Bassani, L.
Some giant radio galaxies selected at X-rays with an AGN show signs of a restarted nuclear activity. One object in this peculiar class is Mrk1498, a giant low-frequency double radio source that shows extended emission in [OIII]. This emission is like
Externí odkaz:
http://arxiv.org/abs/2409.07534
Autor:
Sánchez-Sáez, P., Hernández-García, L., Bernal, S., Bayo, A., Rivera, G. Calistro, Bauer, F. E., Ricci, C., Merloni, A., Graham, M. J., Cartier, R., Arévalo, P., Assef, R. J., Concas, A., Homan, D., Krumpe, M., Lira, P., Malyali, A., Martínez-Aldama, M. L., Arancibia, A. M. Muñoz, Rau, A., Bruni, G., Förster, F., Pavez-Herrera, M., Tubín-Arenas, D., Brightman, M.
The galaxy SDSS1335+0728, which had exhibited no prior optical variations during the preceding two decades, began showing significant nuclear variability in the Zwicky Transient Facility (ZTF) alert stream from December 2019 (as ZTF19acnskyy). Its be
Externí odkaz:
http://arxiv.org/abs/2406.11983
Autor:
Silva-Farfán, Javier, Förster, Francisco, Moriya, Takashi J., Hernández-García, L., Arancibia, A. M. Muñoz, Sánchez-Sáez, P., Anderson, Joseph P., Tonry, John L., Clocchiatti, Alejandro
We report an analysis of a sample of 186 spectroscopically confirmed Type II supernova (SN) light curves (LCs) obtained from a combination of Zwicky Transient Facility (ZTF) and Asteroid Terrestrial-impact Last Alert System (ATLAS) observations. We i
Externí odkaz:
http://arxiv.org/abs/2404.12620
Autor:
Arévalo, P., López-Navas, E., Martínez-Aldama, M. L., Lira, P., Bernal, S., Sánchez-Sáez, P., Salvato, M., Hernández-García, L., Ricci, C., Merloni, A., Krumpe, M.
Publikováno v:
A&A 683, L8 (2024)
We report on the finding of a newborn AGN, i.e. current AGN activity in a galaxy previously classified as non-active, and characterize its evolution. Black hole ignition event candidates were selected from a parent sample of spectrally classified non
Externí odkaz:
http://arxiv.org/abs/2402.19403
Autor:
López-Navas, E., Sánchez-Sáez, P., Arévalo, P., Bernal, S., Graham, M. J., Hernández-García, L., Homan, D., Krumpe, M., Lamer, G., Lira, P., Martínez-Aldama, M. L., Merloni, A., Ríos, S., Salvato, M., Stern, D., Tubín-Arenas, D.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 2023; stad1893
We present second epoch optical spectra for 30 changing-look (CL) candidates found by searching for Type-1 optical variability in a sample of active galactic nuclei (AGNs) spectroscopically classified as Type 2. We use a random-forest-based light cur
Externí odkaz:
http://arxiv.org/abs/2306.13808
Autor:
Arevalo, P., Churazov, E., Lira, P., Sanchez-Saez, P., Bernal, S., Hernandez-Garcia, L., Lopez-Navas, E., Patel, P.
Aims: Establish the dependence of variability properties, such as characteristic timescales and variability amplitude, on basic quasar parameters such as black hole mass and accretion rate, controlling for the rest-frame wavelength of emission. Metho
Externí odkaz:
http://arxiv.org/abs/2306.11099
Autor:
Sánchez-Sáez, P., Arredondo, J., Bayo, A., Arévalo, P., Bauer, F. E., Cabrera-Vives, G., Catelan, M., Coppi, P., Estévez, P. A., Förster, F., Hernández-García, L., Huijse, P., Kurtev, R., Lira, P., Arancibia, A. M. Muñoz, Pignata, G.
Publikováno v:
A&A 675, A195 (2023)
We present a variability, color and morphology based classifier, designed to identify transients, persistently variable, and non-variable sources, from the Zwicky Transient Facility (ZTF) Data Release 11 (DR11) light curves of extended and point sour
Externí odkaz:
http://arxiv.org/abs/2304.08519
Autor:
Hernández-García, L., Panessa, F., Bruni, G., Bassani, L., Arévalo, P., Patiño-Alvarez, V. M., Tramacere, A., Lira, P., Sánchez-Sáez, P., Bauer, F. E., Chavushyan, V., Carraro, R., Förster, F., Arancibia, A. M. Muñoz, Ubertini, P.
PBC J2333.9-2343 is a giant radio galaxy at z = 0.047 with a bright central core associated to a blazar nucleus. If the nuclear blazar jet is a new phase of the jet activity, then the small orientation angle suggest a dramatic change of the jet direc
Externí odkaz:
http://arxiv.org/abs/2303.08842