Search Results - "Cellone, S. A."

Evolutionary properties of the low-luminosity galaxy population in the NGC5044 Group by Buzzoni, A, Cellone, S. A, Saracco, P, Zucca, E

“…In this third paper of a series we present Johnson-Gunn B, g, V, r, i, z multicolour photometry for 79 objects, including a significant fraction of the…”
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Microvariability in AGNs: study of different statistical methods – II. Light curves from simulated images by Zibecchi, L, Andruchow, I, Cellone, S A, Carpintero, D D

“…ABSTRACT In a previous paper, we studied two statistical methods used to analyse the variability of active galactic nuclei (AGNs): the C and F statistics…”
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The low-luminosity galaxy population in the NGC 5044 Group by Cellone, Sergio A., Buzzoni, Alberto

“…We present multicolour imaging for a sample of 33 dwarf and intermediate-luminosity galaxies in the field of the NGC 5044 Group, complemented with…”
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Discovery of a deep Seyfert-2 galaxy at z  = 0.222 behind NGC 300 by Combi, J A, Garcia, F, Rodriguez, M J, Gamen, R, Cellone, S A

“…We report on the unveiling of the nature of the unidentified X-ray source 3XMM J005450.3-373849 as a Seyfert-2 galaxy located behind the spiral galaxy NGC 300…”
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Microvariability in AGNs: study of different statistical methods II. Light curves from simulated images by Zibecchi, L, Andruchow, I, Cellone, S. A, Carpintero, D. D

“…In a previous paper, we studied two statistical methods used to analyse the variability of active galactic nuclei (AGNs): the C and F statistics. Applying them…”
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Optical monitoring in southern blazars. Analysis of variability and spectral colour behaviours by Zibecchi, L, Andruchow, I, Marchesini, E J, Cellone, S A, Combi, J A

“…Abstract We present the results of the optical monitoring of 18 southern blazars in the V and R Johnson-Cousins bands. Our main objective is to study the…”
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Disentangling the nature of the prototype radio weak BL Lac: Contemporaneous multifrequency observations of WISE J141046.00 + 740511.2 by Marchesini, E. J, Reynaldi, V, Vieyro, F, Saponara, J, Andruchow, I, López, I. E, Benaglia, P, Cellone, S. A, Masetti, N, Massaro, F, Peña-Herazo, H. A, Chavushyan, V, Combi, J. A, Acosta-Pulido, J. A, González, B. Agís, Castro-Segura, N

“…A&A 670, A91 (2023) Context. The gamma-ray emitting source WISE J141046.00+740511.2 has been associated with a Fermi-LAT detection by crossmatching with…”
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Early-type galaxies in the Antlia Cluster: global properties by Calderón, J. P, Bassino, L. P, Cellone, S. A, Gómez, Matías, Caso, J. P

“…We present an extension of our previous research on the early-type galaxy population of the Antlia cluster (d ~ 35 Mpc), achieving a total coverage of ~ 2.6…”
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Microvariability in AGNs: study of different statistical methods – I. Observational analysis by Zibecchi, L., Andruchow, I., Cellone, S. A., Carpintero, D. D., Romero, G. E., Combi, J. A.

“…Abstract We present the results of a study of different statistical methods currently used in the literature to analyse the (micro)variability of active…”
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PKS 1622–253: A Weakly Accreting, Powerful Gamma-Ray Source by Punsly, Brian, Rodríguez, Luis F, Tingay, Steven J, Cellone, Sergio A

“…We discuss new deep radio observations of PKS 1622-253 and their implications for the energetics of the central engine that powers this strong high-energy…”
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Microvariability in AGNs: study of different statistical methods - I. Observational analysis by Zibecchi, L, Andruchow, I, Cellone, S. A, Carpintero, D. D, Romero, G. E, Combi, J. A

“…Mon Not R Astron Soc (2017) 467 (1): 340-352 We present the results of a study of different statistical methods currently used in the literature to analyse the…”
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Discovery of a deep Seyfert-2 galaxy at z = 0.222 behind NGC 300 by Combi, J. A, Garcia, F, Rodriguez, M. J, Gamen, R, Cellone, S. A

“…We report on the unveiling of the nature of the unidentified X-ray source 3XMM J005450.3-373849 as a Seyfert-2 galaxy located behind the spiral galaxy NGC 300…”
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Evolutionary properties of the low-luminosity galaxy population in the NGC 5044 Group by Buzzoni, A., Cellone, S. A., Saracco, P., Zucca, E.

“…In this third paper of a series we present Johnson-Gunn B, g, V, r, i, z multicolour photometry for 79 objects, including a significant fraction of the…”
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Looking for blazars in a sample of unidentified high-energy emitting Fermi sources by Marchesini, E. J, Masetti, N, Chavushyan, V, Cellone, S. A, Andruchow, I, Bassani, L, Bazzano, A, Jiménez-Bailón, E, Landi, R, Malizia, A, Palazzi, E, Patiño-Álvarez, V, Rodríguez-Castillo, G. A, Stephen, J. B, Ubertini, P

“…A&A 596, A10 (2016) Context. Based on their overwhelming dominance among associated Fermi gamma ray catalogue sources, it is expected that a large fraction of…”
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Evolutionary properties of the low-luminosity galaxy population in the NGC 5044 Group: Low-luminosity galaxies in the NGC 5044 Group by Buzzoni, A., Cellone, S. A., Saracco, P., Zucca, E.

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Optical flux behaviour of a sample of Fermi blazars by Marchesini, E. J, Andruchow, I, Cellone, S. A, Combi, J. A, Zibecchi, L, Martí, J, Romero, G. E, Muñoz-Arjonilla, A. J, Luque-Escamilla, P, Sánchez-Sutil, J. R

“…A&A 591, A21 (2016) Aims: We aim at investigating the time-behaviour of a sample of gamma-ray blazars. We present the results from a 13 month-long optical…”
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Evolutionary properties of the low-luminosity galaxy population in the NGC5044 Group by Buzzoni, A, Cellone, S. A, Saracco, P, Zucca, E

“…With this third paper of a series we present Johnson-Gunn B,g,V,r,i,z multicolour photometry for 79 objects, including a significant fraction of the faintest…”
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Extremely violent optical microvariability in blazars: fact or fiction? by Cellone, Sergio A., Romero, Gustavo E., Araudo, Anabella T.

“…Variability amplitudes larger than 1 mag over time-scales of a few tens of minutes have recently been reported in the optical light curves of several blazars…”
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Polarization and photometric observations of the gamma-ray blazar PG 1553+113 by Andruchow, I, Combi, J. A, Muñoz-Arjonilla, A. J, Romero, G. E, Cellone, S. A, Martí, J

“…We present the results of an observational photo-polarimetry campaign of the blazar PG 1553+113 at optical wavelengths. The blazar was recently detected at…”
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The intriguing nature of the high energy gamma ray source XSSJ12270-4859 by de Martino, D, Falanga, M, Bonnet-Bidaud, J. -M, Belloni, T, Mouchet, M, Masetti, N, Andruchow, I, Cellone, S. A, Mukai, K, Matt, G

“…The nature of the hard X-ray source XSSJ12270-4859 is still unclear though it was claimed to be a magnetic Cataclysmic Variable. We here present a broad-band…”
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