Search Results - "Andruchow, I."

Gemini Near Infrared Spectrograph–Distant Quasar Survey: Prescriptions for Calibrating UV-based Estimates of Supermassive Black Hole Masses in High-redshift Quasars by Dix, Cooper, Matthews, Brandon, Shemmer, Ohad, Brotherton, Michael S., Myers, Adam D., Andruchow, I., Brandt, W. N., Ferrero, Gabriel A., Green, Richard, Lira, Paulina, Plotkin, Richard M., Richards, Gordon T., Schneider, Donald P.

“…Abstract The most reliable single-epoch supermassive black hole mass ( M BH ) estimates in quasars are obtained by using the velocity widths of low-ionization…”
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Gemini Near Infrared Spectrograph–Distant Quasar Survey: Augmented Spectroscopic Catalog and a Prescription for Correcting UV-based Quasar Redshifts by Matthews, Brandon M., Dix, Cooper, Shemmer, Ohad, Brotherton, Michael S., Myers, Adam D., Andruchow, I., Brandt, W. N., Gallagher, S. C., Green, Richard, Lira, Paulina, McLane, Jacob N., Plotkin, Richard M., Richards, Gordon T., Runnoe, Jessie C., Schneider, Donald P., Strauss, Michael A.

“…Abstract Quasars at z ≳ 1 most often have redshifts measured from rest-frame ultraviolet emission lines. One of the most common such lines, C iv λ 1549, shows…”
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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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RADIO-WEAK BL LAC OBJECTS IN THE FERMI ERA by Massaro, F., Marchesini, E. J., D'Abrusco, R., Masetti, N., Andruchow, I., Smith, Howard A.

“…ABSTRACT The existence of "radio-weak BL Lac objects" (RWBLs) has been an open question, and has remained unsolved since the discovery that quasars could be…”
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Powerful Radio Sources in the Southern Sky. III. First Results of the Optical Spectroscopic Campaign by García-Pérez, A., Peña-Herazo, H. A., Jimenez-Gallardo, A., Chavushyan, V., Massaro, F., White, S. V., Capetti, A., Balmaverde, B., Forman, W. R., Cheung, C. C., Madrid, J. P., Mazzucchelli, C., Nesvadba, N. P. H., Andruchow, I., Cellone, S., Grossová, R., Paggi, A., Sani, E., Reynaldi, V., Kraft, R. P., Leto, C.

“…Abstract We recently built the G4Jy-3CRE catalog of extragalactic radio sources. This catalog lists 264 powerful radio sources selected with similar criteria…”
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Powerful Radio Sources in the Southern Sky. II. A Swift X-Ray Perspective by Massaro, F., White, S. V., Paggi, A., Jimenez-Gallardo, A., Madrid, J. P., Mazzucchelli, C., Forman, W. R., Capetti, A., Leto, C., García-Pérez, A., Cheung, C. C., Chavushyan, V., Nesvadba, N. P. H., Andruchow, I., Peña-Herazo, H. A., Sani, E., Grossová, R., Reynaldi, V., Kraft, R. P., Balmaverde, B., Cellone, S.

“…Abstract We recently constructed the G4Jy-3CRE, a catalog of extragalactic radio sources based on the GLEAM 4-Jy (G4Jy) sample, with the aim of increasing the…”
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Powerful Radio Sources in the Southern Sky. I. Optical Identifications by Massaro, F., White, S. V., García-Pérez, A., Jimenez-Gallardo, A., Capetti, A., Cheung, C. C., Forman, W. R., Mazzucchelli, C., Paggi, A., Nesvadba, N. P. H., Madrid, J. P., Andruchow, I., Cellone, S., Peña-Herazo, H. A., Grossová, R., Balmaverde, B., Sani, E., Chavushyan, V., Kraft, R. P., Reynaldi, V., Leto, C.

“…Abstract Since the early sixties, our view of radio galaxies and quasars has been drastically shaped by discoveries made thanks to observations of radio…”
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On the origin of X-ray oxygen emission lines in obscured AGN by Reynaldi, V, Guainazzi, M, Bianchi, S, Andruchow, I, García, F, Salerno, N, López, I E

“…ABSTRACT We present the Catalogue of High Resolution Spectra of Obscured Sources (CHRESOS) from the XMM–Newton Science Archive. It comprises the emission-line…”
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On the nature of the hard X-ray sources SWIFT J1907.3−2050, IGR J12123−5802 and IGR J19552+0044 by Bernardini, F., de Martino, D., Mukai, K., Falanga, M., Andruchow, I., Bonnet-Bidaud, J.-M., Masetti, N., Buitrago, D. H. Gonzalez, Mouchet, M., Tovmassian, G.

“…The INTEGRAL and Swift hard X-ray surveys have identified a large number of new sources, among which many are proposed as Cataclysmic Variables (CVs). Here, we…”
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Optical spectroscopic classification of 35 hard X-ray sources from the Swift-BAT 70-month catalogue by Marchesini, E. J., Masetti, N., Palazzi, E., Chavushyan, V., Jiménez-Bailón, E., Patiño-Álvarez, V. M., Reynaldi, V., Rojas, A. F., Saviane, I., Andruchow, I., Bassani, L., Bazzano, A., Bird, A. J., Malizia, A., Minniti, D., Monaco, L., Stephen, J. B., Ubertini, P.

“…The nature of a substantial percentage (about one fifth) of hard X-ray sources discovered with the BAT instrument onboard the Neil Gehrels Swift Observatory…”
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Optical flux and spectral characterization of the blazar PG 1553 + 113 based on the past 15 years of data by Agarwal, Aditi, Mihov, B., Andruchow, I., Cellone, Sergio A., Anupama, G. C., Agrawal, V., Zola, S., Özdönmez, Aykut, Ege, Ergün

“…We study flux and spectral variability of the high energy peaked TeV blazar PG 1553 + 113 on diverse timescales using the data collected from 2005 to 2019…”
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Incidence of the host galaxy on the measured optical linear polarization of blazars by Andruchow, I., Cellone, Sergio A., Romero, Gustavo E.

“…We study the incidence of the underlying host galaxy light on the measured optical linear polarization of blazars. Our methodology consists of the…”
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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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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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Gamma-ray bursts with peculiar temporal asymmetry by Romero, Gustavo E., Torres, Diego F., Andruchow, I., Anchordoqui, Luis A., Link, Bennett

“…Based on Link & Epstein's study of temporal asymmetry of 631 gamma-ray bursts from the BATSE 3B catalogue, we identify the population of bursts with rising…”
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Incidence of the host galaxy on the measured optical linear polarization of blazars by Andruchow, I., Cellone, Sergio A., Romero, Gustavo E.

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Investigation of the double-lobed sources of the Cygnus constellation core by Saponara, J, Benaglia, P, Andruchow, I, Ishwara-Chandra, C. H, Intema, H. T

“…We present a collection of double-lobed sources towards a 20 sq deg area of the Cygnus region at the northern sky, observed at 325 and 610~MHz with the Giant…”
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Multi-wavelength Analysis and Modeling of OJ 287 During 2017-2020 by Prince, Raj, Agarwal, Aditi, Gupta, Nayantara, Majumdar, Pratik, Czerny, Bożena, Cellone, Sergio A, Andruchow, I

“…A&A 654, A38 (2021) Context. The blazar OJ 287 has been proposed as a binary black hole system based on its periodic optical outburst. Among blazars with…”
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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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Gemini Near Infrared Spectrograph - Distant Quasar Survey: Prescriptions for Calibrating UV-Based Estimates of Supermassive Black Hole Masses in High-Redshift Quasars by Dix, Cooper, Matthews, Brandon, Shemmer, Ohad, Brotherton, Michael S, Myers, Adam D, Andruchow, I, Brandt, W. N, Ferrero, Gabriel A, Green, Richard, Lira, Paulina, Plotkin, Richard M, Richards, Gordon T, Schneider, Donald P

“…The most reliable single-epoch supermassive black hole mass ($M_{\rm BH}$) estimates in quasars are obtained by using the velocity widths of low-ionization…”
Get full text