Search Results - "Borman, G. A."

Exploring the Connection between Parsec-scale Jet Activity and Broadband Outbursts in 3C 279 by Rani, B., Jorstad, S. G., Marscher, A. P., Agudo, I., Sokolovsky, K. V., Larionov, V. M., Smith, P., Mosunova, D. A., Borman, G. A., Grishina, T. S., Kopatskaya, E. N., Mokrushina, A. A., Morozova, D. A., Savchenko, S. S., Troitskaya, Yu. V., Troitsky, I. S., Thum, C., Molina, S. N., Casadio, C.

“…We use a combination of high-resolution very long baseline interferometry (VLBI) radio and multiwavelength flux density and polarization observations to…”
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Quasi-simultaneous Optical Flux and Polarization Variability of the Binary Super Massive Black Hole Blazar OJ 287 from 2015 to 2023: Detection of an Anticorrelation in Flux and Polarization Variability by Gupta, Alok C., Kushwaha, Pankaj, Valtonen, Mauri J., Savchenko, Sergey S., Jorstad, Svetlana G., Imazawa, Ryo, Wiita, Paul J., Gu, Minfeng, Marscher, Alan P., Zhang, Zhongli, Bachev, Rumen, Borman, G. A., Gaur, Haritma, Grishina, T. S., Hagen-Thorn, V. A., Kopatskaya, E. N., Larionov, V. M., Larionova, E. G., Larionova, L. V., Morozova, D. A., Nakaoka, T., Strigachev, A., Troitskaya, Yulia V., Troitsky, I. S., Uemura, M., Vasilyev, A. A., Weaver, Z. R., Zhovtan, A. V.

“…Abstract We study the optical flux and polarization variability of the binary black hole blazar OJ 287 using quasi-simultaneous observations from 2015 to 2023…”
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Multiwavelength Variability of BL Lacertae Measured with High Time Resolution by Weaver, Z. R., Williamson, K. E., Jorstad, S. G., Marscher, A. P., Larionov, V. M., Raiteri, C. M., Villata, M., Acosta-Pulido, J. A., Bachev, R., Baida, G. V, Balonek, T. J., Benítez, E., Borman, G. A., Bozhilov, V., Carnerero, M. I., Carosati, D., Chen, W. P., Damljanovic, G., Dhiman, V., Dougherty, D. J., Ehgamberdiev, S. A., Grishina, T. S., Gupta, A. C., Hart, M., Hiriart, D., Hsiao, H. Y., Ibryamov, S., Joner, M., Kimeridze, G. N., Kopatskaya, E. N., Kurtanidze, O. M., Kurtanidze, S. O., Larionova, E. G., Matsumoto, K., Matsumura, R., Minev, M., Mirzaqulov, D. O., Morozova, D. A., Nikiforova, A. A., Nikolashvili, M. G., Ovcharov, E., Rizzi, N., Sadun, A., Savchenko, S. S., Semkov, E., Slater, J. J., Smith, K. L., Stojanovic, M., Strigachev, A., Troitskaya, Yu. V., Troitsky, I. S., Tsai, A. L., Vince, O., Valcheva, A., Vasilyev, A. A., Zaharieva, E., Zhovtan, A. V.

“…In an effort to locate the sites of emission at different frequencies and physical processes causing variability in blazar jets, we have obtained high…”
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Quasi-periodic behaviour in the optical and γ-ray light curves of blazars 3C 66A and B2 1633+38 by Otero-Santos, J, Acosta-Pulido, J A, Becerra González, J, Raiteri, C M, Larionov, V M, Peñil, P, Smith, P S, Ballester Niebla, C, Borman, G A, Carnerero, M I, Castro Segura, N, Grishina, T S, Kopatskaya, E N, Larionova, E G, Morozova, D A, Nikiforova, A A, Savchenko, S S, Troitskaya, Yu V, Troitsky, I S, Vasilyev, A A, Villata, M

“…ABSTRACT We report on quasi-periodic variability found in two blazars included in the Steward Observatory Blazar Monitoring data sample: the BL Lac object 3C…”
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Spectral variability of the 3C 390.3 nucleus for more than 20 yr – I. Variability of the broad and narrow emission line fluxes by Sergeev, S G, Nazarov, S V, Borman, G A

“…We summarize results of the analysis of the optical variability of the continuum and emission-line fluxes in the 3C 390.3 nucleus during 1992-2014. The [O iii]…”
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The Bright γ-ray Flare of 3C 279 in 2015 June: AGILE Detection and Multifrequency Follow-up Observations by Pittori, C., Lucarelli, F., Verrecchia, F., Raiteri, C. M., Villata, M., Vittorini, V., Tavani, M., Puccetti, S., Perri, M., Donnarumma, I., Vercellone, S., Acosta-Pulido, J. A., Bachev, R., Benítez, E., Borman, G. A., Carnerero, M. I., Carosati, D., Chen, W. P., Ehgamberdiev, Sh. A., Goded, A., Grishina, T. S., Hiriart, D., Hsiao, H. Y., Jorstad, S. G., Kimeridze, G. N., Kopatskaya, E. N., Kurtanidze, O. M., Kurtanidze, S. O., Larionov, V. M., Larionova, L. V., Marscher, A. P., Mirzaqulov, D. O., Morozova, D. A., Nilsson, K., Samal, M. R., Sigua, L. A., Spassov, B., Strigachev, A., Takalo, L. O., Antonelli, L. A., Bulgarelli, A., Cattaneo, P., Colafrancesco, S., Giommi, P., Longo, F., Morselli, A., Paoletti, F.

“…We report the AGILE detection and the results of the multifrequency follow-up observations of a bright γ-ray flare of the blazar 3C 279 in 2015 June. We use…”
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The Method of Searching for Rotations of the Polarization Position Angle of Quasars by Savchenko, S. S., Morozova, D. A., Jorstad, S. G., Blinov, D. A., Borman, G. A., Vasilyev, A. A., Grishina, T. S., Zhovtan, A. V., Kopatskaya, E. N., Larionova, E. G., Troitskiy, I. S., Troitskaya, Yu. V., Shishkina, E. V., Shkodkina, E. A.

“…Observations of quasars show that the polarization position angle of the emission coming from them varies greatly over time, including periods called rotations…”
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Type II-P Supernova SN 2018aoq in NGC 4151: Light Curves, Models, and Distance by Tsvetkov, D. Yu, Pavlyuk, N. N., Vozyakova, O. V., Shatsky, N. I., Tatarnikov, A. M., Nikiforova, A. A., Baklanov, P. V., Blinnikov, S. I., Ushakova, M. G., Larionova, E. G., Borman, G. A.

“…The results of UBVRIJHK photometry for the type II-P supernova SN 2018aoq in NGC 4151 obtained from April 4, 2018, to January 14, 2019, with several…”
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BVRI CCD-Photometry of Comparison Stars in the Fields of Galaxies with Active Nuclei. VII by Doroshenko, V. T., Efimov, Yu. S., Borman, G. A., Pulatova, N. G.

“…Data are presented from observations in the B, V, R, and I bands of 234 comparison stars in the fields of 21 active galactic nuclei (AGN) with right ascensions…”
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BVRI CCD-Photometry of Comparison Stars in the Fields of Galaxies with Active Nuclei. VI by Doroshenko, V. T., Efimov, Yu. S., Borman, G. A., Pulatova, N. G.

“…Data are presented from observations in the B, V, R, and I bands of 200 comparison stars in the fields of 18 active galactic nuclei (AGN) with right ascensions…”
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BVRI CCD-Photometry of comparison stars in the fields of galaxies with active nuclei. V by Doroshenko, V. T., Sergeev, S. G., Efimov, Yu. S., Borman, G. A., Okhmat, D. N., Pulatova, N. G., Nazarov, S. V.

“…Observations of 79 comparison stars in the fields of seven Seyfert galaxies (Akn 79, Mrk 374, Mrk 382, Mrk 478, Mrk 493, Mrk 618, and Mrk 1513) and a single…”
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Analyzing polarization swings in 3C 279 by Kiehlmann, S., Savolainen, T., Jorstad, S. G., Sokolovsky, K. V., Schinzel, F. K., Agudo, I., Arkharov, A. A., Benítez, E., Berdyugin, A., Blinov, D. A., Bochkarev, N. G., Borman, G. A., Burenkov, A. N., Casadio, C., Doroshenko, V. T., Efimova, N. V., Fukazawa, Y., Gómez, J. L., Hagen-Thorn, V. A., Heidt, J., Hiriart, D., Itoh, R., Joshi, M., Kimeridze, G. N., Konstantinova, T. S., Kopatskaya, E. N., Korobtsev, I. V., Kovalev, Y. Y., Krajci, T., Kurtanidze, O., Kurtanidze, S. O., Larionov, V. M., Larionova, E. G., Larionova, L. V., Lindfors, E., López, E., Marscher, A. P., McHardy, I. M., Molina, S. N., Morozova, D. A., Nazarov, S.V., Nikolashvili, M. G., Nilsson, K., Pulatova, N. G., Reinthal, R., Sadun, A., Sergeev, S. G., Sigua, L. A., Sorcia, M., Spiridonova, O. I., Takalo, L. O., Taylor, B., Troitsky, I. S., Ugolkova, L. S., Zensus, J. A., Zhdanova, V. E.

“…Quasar 3C 279 is known to exhibit episodes of optical polarization angle rotation. We present new, well-sampled optical polarization data for 3C 279 and…”
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The Method of Searching for Rotations of the Polarization Position Angle of Quasars by Savchenko, S. S, Morozova, D. A, Jorstad, S. G, Blinov, D. A, Borman, G. A, Vasilyev, A. A, Grishina, T. S, Zhovtan, A. V, Kopatskaya, E. N, Larionova, E. G, Troitskiy, I. S, Troitskaya, Yu. V, Shishkina, E. V, Shkodkina, E. A

“…Astrophysical Bulletin, Volume 79, Issue 2, pp. 186-202, 2024 Observations of quasars show that the polarization position angle of the emission coming from…”
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Quasi-simultaneous Optical Flux and Polarization Variability of the Binary Super Massive Black Hole Blazar OJ 287 from 2015 to 2023: Detection of an Anticorrelation in Flux and Polarization Variability by Gupta, Alok C, Kushwaha, Pankaj, Valtonen, Mauri J, Savchenko, Sergey S, Jorstad, Svetlana G, Imazawa, Ryo, Wiita, Paul J, Gu, Minfeng, Marscher, Alan P, Zhang, Zhongli, Bachev, Rumen, Borman, G. A, Gaur, Haritma, Grishina, T. S, Hagen-Thorn, V. A, Kopatskaya, E. N, Larionov, V. M, Larionova, E. G, Larionova, L. V, Morozova, D. A, Nakaoka, T, Strigachev, A, Troitskaya, Yulia V, Troitsky, I. S, Uemura, M, Vasilyev, A. A, Weaver, Z. R, Zhovtan, A. V

“…Astrophysical Journal Letters, 957 (2023) L11 (11pp) We study the optical flux and polarization variability of the binary black hole blazar OJ 287 using…”
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The Repeating Flaring Activity of Blazar AO 0235+164 by Pedrosa, Juan Escudero, Agudo, Iván, Tramacere, Andrea, Marscher, Alan P, Jorstad, Svetlana, Weaver, Z. R, Casadio, Carolina, Thum, Clemens, Myserlis, Ioannis, Fuentes, Antonio, Traianou, Efthalia, Kim, Jae-Young, Kramer, Joana, López-Coto, Rubén, D'Ammando, Filippo, Bernardos, M, Bonnoli, Giacomo, Blinov, Dmitriy A, Borman, G. A, Grishina, T. S, Hagen-Thorn, V. A, Kopatskaya, E. N, Larionova, E. G, Larionov, V. M, Larionova, L. V, Morozova, D. A, Savchenko, S. S, Troitskiy, I. S, Troitskaya, Y. V, Vasilyev, A. A

“…Context. Blazar AO 0235+164, located at redshift z = 0.94, has undergone several sharp multi-spectral-range flaring episodes during the last decades. In…”
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Optical variability of the blazar 3C 371: from minute to year timescales by Otero-Santos, J, Raiteri, C. M, Acosta-Pulido, J. A, Carnerero, M. I, Villata, M, Savchenko, S. S, Carosati, D, Chen, W. P, Kurtanidze, S. O, Joner, M. D, Semkov, E, Pursimo, T, Benítez, E, Damljanovic, G, Apolonio, G, Borman, G. A, Bozhilov, V, Galindo-Guil, F. J, Grishina, T. S, Hagen-Thorn, V. A, Hiriart, D, Hsiao, H. Y, Ibryamov, S, Ivanidze, R. Z, Kimeridze, G. N, Kopatskaya, E. N, Kurtanidze, O. M, Larionov, V. M, Larionova, E. G, Larionova, L. V, Minev, M, Morozova, D. A, Nikolashvili, M. G, Ovcharov, E, Sigua, L. A, Stojanovic, M, Troitskiy, I. S, Troitskaya, Yu. V, Tsai, A, Valcheva, A, Vasilyev, A. A, Vince, O, Zaharieva, E, Zhovtan, A. V

“…A&A 686, A228 (2024) The BL Lac object 3C 371 has been observed by the Transiting Exoplanet Survey Satellite (\textit{TESS}) for approximately a year, between…”
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THE STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI. I. RECONSTRUCTED VELOCITY-DELAY MAPS by Grier, C. J., Peterson, B. M., Horne, Keith, Bentz, M. C., Pogge, R. W., Denney, K. D., De Rosa, G., Martini, Paul, Kochanek, C. S., Zu, Y., Shappee, B., Siverd, R., Beatty, T. G., Sergeev, S. G., Kaspi, S., Salvo, C. Araya, Bird, J. C., Bord, D. J., Borman, G. A., Che, X., Chen, C., Cohen, S. A., Dietrich, M., Doroshenko, V. T., Efimov, Yu. S., Free, N., Ginsburg, I., Henderson, C. B., King, A. L., Mogren, K., Molina, M., Mosquera, A. M., Nazarov, S. V., Okhmat, D. N., Pejcha, O., Rafter, S., Shields, J. C., Skowron, J., Szczygiel, D. M., Valluri, M., van Saders, J. L.

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REVERBERATION MAPPING RESULTS FOR FIVE SEYFERT 1 GALAXIES by GRIER, C. J, PETERSON, B. M, KOCHANEK, C. S, SIVERD, R, SHAPPEE, B, STANEK, K. Z, ARAYA SALVO, C, BEATTY, T. G, BIRD, J. C, BORD, D. J, BORMAN, G. A, CHE, X, POGGE, R. W, CHEN, C, COHENI, S. A, DIETRICH, M, DOROSHENKO, V. T, DRAKE, T, EFIMOV, YU. S, FREE, N, GINSBURG, I, HENDERSON, C. B, KING, A. L, DENNEY, K. D, KOSHIDA, S, MOCREN, K, MOLINA, M, MOSQUERA, A. M, NAZAROV, S. V, OKHMAT, D. N, PEJCHA, O, RAFTER, S, SHIELDS, J. C, SKOWRON, J, BENTZ, M. C, SZCZYGIEL, D. M, VALLURI, M, VAN SADERS, J. L, MARTINI, Paul, SERGEEV, S. G, KASPI, S, MINEZAKI, T, ZU, Y

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SPACE TELESCOPE AND OPTICAL REVERBERATION MAPPING PROJECT. III. OPTICAL CONTINUUM EMISSION AND BROADBAND TIME DELAYS IN NGC 5548 by Fausnaugh, M. M., Denney, K. D., Barth, A. J., Bentz, M. C., Bottorff, M. C., Carini, M. T., Croxall, K. V., Rosa, G. De, Goad, M. R., Horne, Keith, Joner, M. D., Kaspi, S., Kim, M., Klimanov, S. A., Kochanek, C. S., Leonard, D. C., Netzer, H., Peterson, B. M., Schnülle, K., Sergeev, S. G., Vestergaard, M., Zheng, W.-K., Zu, Y., Anderson, M. D., Arévalo, P., Bazhaw, C., Borman, G. A., Boroson, T. A., Brandt, W. N., Breeveld, A. A., Brewer, B. J., Cackett, E. M., Crenshaw, D. M., Bontà, E. Dalla, Lorenzo-Cáceres, A. De, Dietrich, M., Edelson, R., Efimova, N. V., Ely, J., Evans, P. A., Filippenko, A. V., Flatland, K., Gehrels, N., Geier, S., Gelbord, J. M., Gonzalez, L., Gorjian, V., Grier, C. J., Grupe, D., Hall, P. B., Hicks, S., Horenstein, D., Hutchison, T., Im, M., Jensen, J. J., Jones, J., Kaastra, J., Kelly, B. C., Kennea, J. A., Kim, S. C., Korista, K. T., Kriss, G. A., Lee, J. C., Lira, P., MacInnis, F., Manne-Nicholas, E. R., Mathur, S., McHardy, I. M., Montouri, C., Musso, R., Nazarov, S. V., Norris, R. P., Nousek, J. A., Okhmat, D. N., Pancoast, A., Papadakis, I., Parks, J. R., Pei, L., Pogge, R. W., Pott, J.-U., Rafter, S. E., Rix, H.-W., Saylor, D. A., Schimoia, J. S., Siegel, M., Spencer, M., Starkey, D., Sung, H.-I., Teems, K. G., Treu, T., Turner, C. S., Uttley, P., Villforth, C., Weiss, Y., Woo, J.-H., Yan, H., Young, S.

“…ABSTRACT We present ground-based optical photometric monitoring data for NGC 5548, part of an extended multiwavelength reverberation mapping campaign. The…”
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Blazar spectral variability as explained by a twisted inhomogeneous jet by Raiteri, C. M., Villata, M., Acosta-Pulido, J. A., Agudo, I., Arkharov, A. A., Bachev, R., Baida, G. V., Benítez, 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., D’Ammando, F., Di Paola, A., Echevarría, J., Efimova, N. V., Ehgamberdiev, Sh. A., Espinosa, C., Fuentes, A., Giunta, A., Gómez, J. L., Grishina, T. S., Gurwell, M. A., Hiriart, D., Jermak, H., Jordan, B., Jorstad, S. G., Joshi, M., Kopatskaya, E. N., Kuratov, K., Kurtanidze, O. M., Kurtanidze, S. O., Lähteenmäki, A., Larionov, V. M., Larionova, E. G., Larionova, L. V., Lázaro, C., Lin, C. S., Malmrose, M. P., Marscher, A. P., Matsumoto, K., McBreen, B., Michel, R., Mihov, B., Minev, M., Mirzaqulov, D. O., Mokrushina, A. A., Molina, S. N., Moody, J. W., Morozova, D. A., Nazarov, S. V., Nikolashvili, M. G., Ohlert, J. M., Okhmat, D. 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., 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.

“…The spectral variability of the blazar CTA 102 during a recent extreme outburst could be explained by a twisted, inhomogeneous jet containing regions of…”
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