Results 31 to 40 of about 277 (132)
The “Blazar Sequence” in the TeV Band
The Astrophysical Journal, 2023 The “blazar sequence” has been proposed for more than 20 yr, yet its nature is still unclear. In this work, for the first time we expand this topic to the TeV band by using a sample of 58 TeV blazars, including 48 blazars in the quiescent state and 21 ...Zhihao Ouyang, Hubing Xiao, Jianzhen Chen, Junhui Fan, Anton A. Strigachev, Rumen S. Bachev, Xiangtao Zeng, Marina Manganaro, Rui Xue, Zelin Li +9 moredoaj +1 more sourceA Search for Low‐Luminosity BL Lacertae Objects
The Astrophysical Journal, 1999 Many properties of BL Lacs have become explicable in terms of the "relativistic beaming" hypothesis whereby BL Lacs are FR-1 radio galaxies viewed nearly along the jet axis. However, a possible problem with this model is that a transition population between beamed BL Lacs and unbeamed FR-1s has not been detected.Rector, Travis A., Stocke, John T., Perlman, Eric S. +2 moreopenaire +2 more sourcesM87: A Misaligned BL Lacertae Object? [PDF]
The Astrophysical Journal, 1998 The nuclear region of M87 was observed with the Faint Object Spectrograph (FOS) on the Hubble Space Telescope (HST) at six epochs, spanning 18 months, after the HST image quality was improved with the deployment of the corrective optics (COSTAR) in 1993 December.Zlatan I. Tsvetanov, George F. Hartig, Holland C. Ford, Michael A. Dopita, Gerard A. Kriss, Yichuan C. Pei, Linda L. Dressel, Richard J. Harms +7 moreopenaire +1 more sourceStudy of Variability in Long-term Multiwavelength Optical Lightcurves of Blazar AO 0235+164
The Astrophysical Journal Supplement Series, 2023 We present a long-term and intraday variability study of optical multiwaveband ( U BV RI ) data from the blazar AO 0235+164 collected by various telescopes for ∼44 yr (1975–2019).Abhradeep Roy, Alok C. Gupta, Varsha R. Chitnis, Sergio A. Cellone, Claudia M. Raiteri, Gustavo E. Romero, Paul J. Wiita, Anshu Chatterjee, Jorge A. Combi, Mai Liao, Arkadipta Sarkar, Massimo Villata +11 moredoaj +1 more sourceDetection of the distant quasar OP 313 with the first Large-Sized Telescope of CTAO
Astronomy & AstrophysicsContext. Flat spectrum radio quasars (FSRQs) often remain undetected at very-high-energy (VHE, E > 100 GeV) γ rays due to their typically soft spectra and large distance.Abe K., Abe S., Abhir J., Abhishek A., Acciari V. A., Acero F., Aguasca-Cabot A., Agudo I., Alispach C., Ambrosino D., Aniello T., Ansoldi S., Antonelli L. A., Aramo C., Arbet-Engels A., Arcaro C., Arnesen T. T. H., Asano K., Aubert P., Babić A., Bakshi C., Baktash A., Balbo M., Bamba A., Baquero Larriva A., Barbosa Martins V., Barres de Almeida U., Barrio J. A., Barrios Jiménez L., Batkovic I., Baxter J., Becerra González J., Bednarek W., Bernardini E., Bernete J., Berti A., Besenrieder J., Bigongiari C., Biland A., Bissaldi E., Blanch O., Bošnjak Ž., Bonnoli G., Bordas P., Borkowski G., Briscioli A., Bronzini E., Brunelli G., Buces J., Bulgarelli A., Burelli I., Burmistrov L., Campoy-Ordaz A., Cardillo M., Caroff S., Carosi A., Carosi R., Carraro R., Carrasco M. S., Carretero-Castrillo M., Cassol F., Castro-Tirado A. J., Cerasole D., Ceribella G., Cerviño Cortínez A., Chai Y., Cheng K., Chiavassa A., Chikawa M., Chon G., Chytka L., Cicciari G. M., Cifuentes Santos A., Contreras J. L., Cortina J., Costantini H., Covino S., Croisonnier M., D’Amico G., Da Vela P., Dalchenko M., Dazzi F., De Angelis A., de Bony de Lavergne M., De Lotto B., de Menezes R., De Palma G., de Souza V., Del Burgo R., Del Peral L., Delfino M., Delgado Mendez C., Delgado Mengual J., della Volpe D., Di Piano A., Di Pierro F., Di Tria R., Di Venere L., Díaz C., Dinesh A., Dominis Prester D., Donini A., Dorner D., Doro M., Eisenberger L., Elsässer D., Emery G., Escudero J., Fariña L., Feligioni L., Ferrarotto F., Fiasson A., Foffano L., Font L., Frías García-Lago F., Fröse S., Fukazawa Y., Gallozzi S., García López R. J., Garcia Soto S., Gasbarra C., Gasparrini D., Gasparyan S., Gaug M., Giesbrecht Paiva J. G., Giglietto N., Giordano F., Gliwny P., Godinovic N., Gradetzke T., Grau R., Greaux L., Green D., Green J., Grolleron G., Gunji S., Günther P., Hackfeld J., Hadasch D., Hahn A., Harutyunyan G., Hashizume M., Hassan T., Hayashi K., Heckmann L., Heller M., Herrera Llorente J., Hirotani K., Hoffmann D., Horns D., Houles J., Hrabovsky M., Hrupec D., Hui D., Iarlori M., Imazawa R., Inada T., Inome Y., Inoue S., Ioka K., Iori M., Israyelyan D., Itokawa T., Iuliano A., Jahanvi J., Jimenez Martinez I., Jimenez Quiles J., Jorge Rodrigo I., Jormanainen J., Jurysek J., Kagaya M., Kalashev O., Kankkunen S., Karas V., Katagiri H., Kayanoki T., Kerszberg D., Kherlakian M., Kiyomot T., Kluge G. W., Kobayashi Y., Kohri K., Kong A., Konrad J., Kornecki P., Kouch P. M., Koziol G., Kubo H., Kushida J., Lacave B., Lainez M., Lamanna G., Lamastra A., Lemoigne L., Lindfors E., Linhoff M., Lombardi S., Longo F., López-Coto R., López-Moya M., López-Oramas A., Loporchio S., Lorini A., Lozano Bahilo J., Lucarelli F., Luciani H., Lulić L., Luque-Escamilla P. L., Lyard E., Majumdar P., Makariev M., Mallamaci M., Mandat D., Maneva G., Manganaro M., Mangano S., Maniadakis D. K., Manicò G., Mannheim K., Marchesi S., Marini F., Mariotti M., Marquez P., Marsella G., Martínez M., Martí J., Martínez G., Martínez M., Martinez O., Maruševec P., Mas-Aguilar A., Massa M., Maurin G., Mazin D., Méndez-Gallego J., Menon S., Mestre Guillen E., Miceli D., Miener T., Miranda J. M., Mirzoyan R., Mizote M., Mizuno T., Molero Gonzalez M., Molina E., Mondal H. A., Montaruli T., Moralejo A., Morcuende D., Moreno Ramos A., Morselli A., Moya V., Müller A. L., Muraishi H., Nagataki S., Nakamori T., Nanci C., Negro A., Neronov A., Neustroev V., Nieto Castaño D., Nievas Rosillo M., Nigro C., Nikolic L., Nilsson K., Nishijima K., Noda K., Nosek D., Novotny V., Nozaki S., Ohishi M., Ohtani Y., Oka T., Okumura A., Orito R., Orsini L., Otero-Santos J., Ottanelli P., Paiano S., Palatiello M., Panebianco G., Paneque D., Pantaleo F. R., Paoletti R., Paredes J. M., Pech M., Pecimotika M., Peresano M., Persic M., Pfeifle F., Pietropaolo E., Pihet M., Pirola G., Plard C., Podobnik F., Polo M., Prada Moroni P. G., Prandini E., Prouza M., Rainò S., Rando R., Rhode W., Ribó M., Rico J., Rizi V., Rodriguez Fernandez G., Rodríguez Frías M. D., Romano P., Roy A., Ruina A., Ruiz-Velasco E., Sahakyan N., Saito T., Sakurai S., Sanchez D. A., Sano H., Santos Moura E., Šarić T., Sato Y., Saturni F. G., Savchenko V., Schiavone F., Schleicher B., Schmitz K., Schmuckermaier F., Schussler F., Schweizer T., Sciaccaluga A., Seglar Arroyo M., Siegert T., Silvestri G., Simongini A., Sitarek J., Sliusar V., Sobczynska D., Sofia I., Stamerra A., Strišković J., Strom D., Strzys M., Suda Y., Sunny A., Tajima H., Takahashi M., Takata J., Takeishi R., Tam P. H. T., Tanaka S. J., Tateishi D., Tavernier T., Temnikov P., Terada Y., Terauchi K., Terzic T., Teshima M., Tluczykont M., Tokanai F., Tomura T., Torres D. F., Tramonti F., Travnicek P., Tripodo G., Tutone A., Ubach S., Vacula M., van Scherpenberg J., Vázquez Acosta M., Ventura S., Vercellone S., Verna G., Viale I., Viana A., Vigliano A., Vigorito C. F., Visentin E., Vitale V., Voitsekhovskyi V., Voutsinas G., Vovk I., Vuillaume T., Walter R., Walther C., Wan L., Wersig F., Will M., Wójtowicz J., Yamamoto T., Yamazaki R., Yao Y., Yeung P. K. H., Yoshida T., Yoshikoshi T., Zhang W., Myserlis I., Rao R., Gurwell M., Keating G., Marscher A., Jorstad S., Angelakis E., Kraus A., Thum C., Acosta-Pulido J. A., Marchini A., Stiaccini L., Aceti P., Banfi M., Leonini S., Conti M., Rosi P., Tinjaca Ramirez L. M., Escudero Pedrosa J., Sota A., Casanova V., Aceituno F. J., Fallah Ramazani V. +415 moredoaj +1 more sourceUBVRI observations of BL Lacertae objects
The Astrophysical Journal Supplement Series, 1985 A total of 85 UBVRI observations of BL Lac objects is presented. For most of them, an average continuum can be traced by means of well-defined color indices. These continua are always well reproduced by power laws, strongly supporting the hypothesis of a synchrotron origin of the radiation output, as well as the conclusion that there is no dust in such M. Moles, J. M. Garcia-Pelayo, J. Masegosa, A. Aparicio +3 moreopenaire +1 more source
