LOFAR FACET CALIBRATION

The Astrophysical Journal Supplement Series American Astronomical Society 223:1 (2016) 2

Authors:

RJ van Weeren, WL Williams, MJ Hardcastle, TW Shimwell, DA Rafferty, J Sabater, G Heald, SS Sridhar, TJ Dijkema, G Brunetti, M Brüggen, F Andrade-Santos, GA Ogrean, HJA Röttgering, WA Dawson, WR Forman, F de Gasperin, C Jones, GK Miley, L Rudnick, CL Sarazin, A Bonafede, PN Best, L Bîrzan, R Cassano, KT Chyży, JH Croston, T Ensslin, C Ferrari, M Hoeft, C Horellou, MJ Jarvis, RP Kraft, M Mevius, HT Intema, SS Murray, E Orrú, R Pizzo, A Simionescu, A Stroe, S van der Tol, GJ White

LOFAR MSSS: detection of a low-frequency radio transient in 400 h of monitoring of the North Celestial Pole

Monthly Notices of the Royal Astronomical Society Oxford University Press 456:3 (2016) 2321-2342

Authors:

AJ Stewart, Robert Fender, JW Broderick, TE Hassall, T Muñoz-Darias, A Rowlinson, JD Swinbank, TD Staley, GJ Molenaar, B Scheers, TL Grobler, M Pietka, G Heald, JP McKean, ME Bell, A Bonafede, RP Breton, D Carbone, Y Cendes, AO Clarke, S Corbel, F de Gasperin, J Eislöffel, H Falcke, C Ferrari, J-M Grießmeier, MJ Hardcastle, V Heesen, JWT Hessels, A Horneffer, M Iacobelli, P Jonker, Aris Karastergiou, G Kokotanekov, VI Kondratiev, M Kuniyoshi, CJ Law, J van Leeuwen, S Markoff, JCA Miller-Jones, D Mulcahy, E Orru, M Pandey-Pommier, L Pratley, E Rol, HJA Röttgering, AMM Scaife, A Shulevski, CA Sobey, BW Stappers

Abstract:

We present the results of a four-month campaign searching for low-frequency radio transients near the North Celestial Pole with the Low-Frequency Array (LOFAR), as part of the Multifrequency Snapshot Sky Survey (MSSS). The data were recorded between 2011 December and 2012 April and comprised 2149 11-min snapshots, each covering 175 deg 2 . We have found one convincing candidate astrophysical transient, with a duration of a few minutes and a flux density at 60 MHz of 15-25 Jy. The transient does not repeat and has no obvious optical or high-energy counterpart, as a result of which its nature is unclear. The detection of this event implies a transient rate at 60 MHz of 3.9 -3.7 +14.7 × 10 -4 d -1 deg -2 , and a transient surface density of 1.5 × 10 -5 deg -2 , at a 7.9-Jy limiting flux density and ~10-min time-scale. The campaign data were also searched for transients at a range of other time-scales, from 0.5 to 297 min, which allowed us to place a range of limits on transient rates at 60MHz as a function of observation duration.

Localization and broadband follow-up of the gravitational-wave transient GW150914

(2016)

Authors:

BP Abbott, R Abbott, TD Abbott, MR Abernathy, F Acernese, K Ackley, C Adams, T Adams, P Addesso, RX Adhikari, VB Adya, C Affeldt, M Agathos, K Agatsuma, N Aggarwal, OD Aguiar, L Aiello, A Ain, P Ajith, B Allen, A Allocca, PA Altin, SB Anderson, WG Anderson, K Arai, MC Araya, CC Arceneaux, JS Areeda, N Arnaud, KG Arun, S Ascenzi, G Ashton, M Ast, SM Aston, P Astone, P Aufmuth, C Aulbert, S Babak, P Bacon, MKM Bader, PT Baker, F Baldaccini, G Ballardin, SW Ballmer, JC Barayoga, SE Barclay, BC Barish, D Barker, F Barone, B Barr, L Barsotti, M Barsuglia, D Barta, S Barthelmy, J Bartlett, I Bartos, R Bassiri, A Basti, JC Batch, C Baune, V Bavigadda, M Bazzan, B Behnke, M Bejger, AS Bell, CJ Bell, BK Berger, J Bergman, G Bergmann, CPL Berry, D Bersanetti, A Bertolini, J Betzwieser, S Bhagwat, R Bhandare, IA Bilenko, G Billingsley, J Birch, R Birney, S Biscans, A Bisht, M Bitossi, C Biwer, MA Bizouard, JK Blackburn, CD Blair, DG Blair, RM Blair, S Bloemen, O Bock, TP Bodiya, M Boer, G Bogaert, C Bogan, A Bohe, P Bojtos, C Bond, F Bondu, R Bonnand, BA Boom, R Bork, V Boschi, S Bose, Y Bouffanais, A Bozzi, C Bradaschia, PR Brady, VB Braginsky, M Branchesi, JE Brau, T Briant, A Brillet, M Brinkmann, V Brisson, P Brockill, AF Brooks, DA Brown, DD Brown, NM Brown, CC Buchanan, A Buikema, T Bulik, HJ Bulten, A Buonanno, D Buskulic, C Buy, RL Byer, L Cadonati, G Cagnoli, C Cahillane, JC Bustillo, T Callister, E Calloni, JB Camp, KC Cannon, J Cao, CD Capano, E Capocasa, F Carbognani, S Caride, JC Diaz, C Casentini, S Caudill, M Cavaglià, F Cavalier, R Cavalieri, G Cella, CB Cepeda, LC Baiardi, G Cerretani, E Cesarini, R Chakraborty, T Chalermsongsak, SJ Chamberlin, M Chan, S Chao, P Charlton, E Chassande-Mottin, HY Chen, Y Chen, C Cheng, A Chincarini, A Chiummo, HS Cho, M Cho, JH Chow, N Christensen, Q Chu, S Chua, S Chung, G Ciani, F Clara, JA Clark, F Cleva, E Coccia, P-F Cohadon, A Colla, CG Collette, L Cominsky, M Constancio, A Conte, L Conti, D Cook, TR Corbitt, N Cornish, A Corsi, S Cortese, CA Costa, MW Coughlin, SB Coughlin, J-P Coulon, ST Countryman, P Couvares, EE Cowan, DM Coward, MJ Cowart, DC Coyne, R Coyne, K Craig, JDE Creighton, J Cripe, SG Crowder, A Cumming, L Cunningham, E Cuoco, T Dal Canton, SL Danilishin, S D'Antonio, K Danzmann, NS Darman, V Dattilo, I Dave, HP Daveloza, M Davier, GS Davies, EJ Daw, R Day, D DeBra, G Debreczeni, J Degallaix, M De Laurentis, S Deléglise, W Del Pozzo, T Denker, T Dent, H Dereli, V Dergachev, RT DeRosa, R De Rosa, R DeSalvo, S Dhurandhar, MC Díaz, L Di Fiore, M Di Giovanni, A Di Lieto, S Di Pace, I Di Palma, A Di Virgilio, G Dojcinoski, V Dolique, F Donovan, KL Dooley, S Doravari, R Douglas, TP Downes, M Drago, RWP Drever, JC Driggers, Z Du, M Ducrot, SE Dwyer, TB Edo, MC Edwards, A Effler, H-B Eggenstein, P Ehrens, J Eichholz, SS Eikenberry, W Engels, RC Essick, T Etzel, M Evans, TM Evans, R Everett, M Factourovich, V Fafone, H Fair, S Fairhurst, X Fan, Q Fang, S Farinon, B Farr, WM Farr, M Favata, M Fays, H Fehrmann, MM Fejer, I Ferrante, EC Ferreira, F Ferrini, F Fidecaro, I Fiori, D Fiorucci, RP Fisher, R Flaminio, M Fletcher, J-D Fournier, S Franco, S Frasca, F Frasconi, Z Frei, A Freise, R Frey, V Frey, TT Fricke, P Fritschel, VV Frolov, P Fulda, M Fyffe, HAG Gabbard, JR Gair, L Gammaitoni, SG Gaonkar, F Garufi, A Gatto, G Gaur, N Gehrels, G Gemme, B Gendre, E Genin, A Gennai, J George, L Gergely, V Germain, A Ghosh, S Ghosh, JA Giaime, KD Giardina, A Giazotto, K Gill, A Glaefke, E Goetz, R Goetz, L Gondan, G González, JMG Castro, A Gopakumar, NA Gordon, ML Gorodetsky, SE Gossan, M Gosselin, R Gouaty, C Graef, PB Graff, M Granata, A Grant, S Gras, C Gray, G Greco, AC Green, P Groot, H Grote, S Grunewald, GM Guidi, X Guo, A Gupta, MK Gupta, KE Gushwa, EK Gustafson, R Gustafson, JJ Hacker, BR Hall, ED Hall, G Hammond, M Haney, MM Hanke, J Hanks, C Hanna, MD Hannam, J Hanson, T Hardwick, K Haris, J Harms, GM Harry, IW Harry, MJ Hart, MT Hartman, C-J Haster, K Haughian, A Heidmann, MC Heintze, H Heitmann, P Hello, G Hemming, M Hendry, IS Heng, J Hennig, AW Heptonstall, M Heurs, S Hild, D Hoak, KA Hodge, D Hofman, SE Hollitt, K Holt, DE Holz, P Hopkins, DJ Hosken, J Hough, EA Houston, EJ Howell, YM Hu, S Huang, EA Huerta, D Huet, B Hughey, S Husa, SH Huttner, T Huynh-Dinh, A Idrisy, N Indik, DR Ingram, R Inta, HN Isa, J-M Isac, M Isi, G Islas, T Isogai, BR Iyer, K Izumi, T Jacqmin, H Jang, K Jani, P Jaranowski, S Jawahar, F Jiménez-Forteza, WW Johnson, DI Jones, R Jones, RJG Jonker, L Ju, CV Kalaghatgi, V Kalogera, S Kandhasamy, G Kang, JB Kanner, S Karki, M Kasprzack, E Katsavounidis, W Katzman, S Kaufer, T Kaur, K Kawabe, F Kawazoe, F Kéfélian, MS Kehl, D Keitel, DB Kelley, W Kells, R Kennedy, JS Key, A Khalaidovski, FY Khalili, I Khan, S Khan, Z Khan, EA Khazanov, N Kijbunchoo, C Kim, J Kim, K Kim, N Kim, N Kim, Y-M Kim, EJ King, PJ King, DL Kinzel, JS Kissel, L Kleybolte, S Klimenko, SM Koehlenbeck, K Kokeyama, S Koley, V Kondrashov, A Kontos, M Korobko, WZ Korth, I Kowalska, DB Kozak, V Kringel, A Królak, C Krueger, G Kuehn, P Kumar, L Kuo, A Kutynia, BD Lackey, M Landry, J Lange, B Lantz, PD Lasky, A Lazzarini, C Lazzaro, P Leaci, S Leavey, EO Lebigot, CH Lee, HK Lee, HM Lee, K Lee, A Lenon, M Leonardi, JR Leong, N Leroy, N Letendre, Y Levin, BM Levine, TGF Li, A Libson, TB Littenberg, NA Lockerbie, J Logue, AL Lombardi, JE Lord, M Lorenzini, V Loriette, M Lormand, G Losurdo, JD Lough, H Lück, AP Lundgren, J Luo, R Lynch, Y Ma, T MacDonald, B Machenschalk, M MacInnis, DM Macleod, F Magaña-Sandoval, RM Magee, M Mageswaran, E Majorana, I Maksimovic, V Malvezzi, N Man, I Mandel, V Mandic, V Mangano, GL Mansell, M Manske, M Mantovani, F Marchesoni, F Marion, S Márka, Z Márka, AS Markosyan, E Maros, F Martelli, L Martellini, IW Martin, RM Martin, DV Martynov, JN Marx, K Mason, A Masserot, TJ Massinger, M Masso-Reid, F Matichard, L Matone, N Mavalvala, N Mazumder, G Mazzolo, R McCarthy, DE McClelland, S McCormick, SC McGuire, G 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Ottens, H Overmier, BJ Owen, A Pai, SA Pai, JR Palamos, O Palashov, N Palliyaguru, C Palomba, A Pal-Singh, H Pan, C Pankow, F Pannarale, BC Pant, F Paoletti, A Paoli, MA Papa, HR Paris, W Parker, D Pascucci, A Pasqualetti, R Passaquieti, D Passuello, B Patricelli, Z Patrick, BL Pearlstone, M Pedraza, R Pedurand, L Pekowsky, A Pele, S Penn, A Perreca, M Phelps, O Piccinni, M Pichot, F Piergiovanni, V Pierro, G Pillant, L Pinard, IM Pinto, M Pitkin, R Poggiani, P Popolizio, A Post, J Powell, J Prasad, V Predoi, SS Premachandra, T Prestegard, LR Price, M Prijatelj, M Principe, S Privitera, GA Prodi, L Prokhorov, O Puncken, M Punturo, P Puppo, M Pürrer, H Qi, J Qin, V Quetschke, EA Quintero, R Quitzow-James, FJ Raab, DS Rabeling, H Radkins, P Raffai, S Raja, M Rakhmanov, P Rapagnani, V Raymond, M Razzano, V Re, J Read, CM Reed, T Regimbau, L Rei, S Reid, DH Reitze, H Rew, SD Reyes, F Ricci, K Riles, NA Robertson, R Robie, F Robinet, A Rocchi, L Rolland, JG Rollins, VJ Roma, R Romano, G Romanov, JH Romie, D Rosińska, S Rowan, A Rüdiger, P Ruggi, K Ryan, S Sachdev, T Sadecki, L Sadeghian, L Salconi, M Saleem, F Salemi, A Samajdar, L Sammut, EJ Sanchez, V Sandberg, B Sandeen, JR Sanders, B Sassolas, BS Sathyaprakash, PR Saulson, O Sauter, RL Savage, A Sawadsky, P Schale, R Schilling, J Schmidt, P Schmidt, R Schnabel, RMS Schofield, A Schönbeck, E Schreiber, D Schuette, BF Schutz, J Scott, SM Scott, D Sellers, D Sentenac, V Sequino, A Sergeev, G Serna, Y Setyawati, A Sevigny, DA Shaddock, S Shah, MS Shahriar, M Shaltev, Z Shao, B Shapiro, P Shawhan, A Sheperd, DH Shoemaker, DM Shoemaker, K Siellez, X Siemens, D Sigg, AD Silva, D Simakov, A Singer, A Singh, R Singh, A Singhal, AM Sintes, BJJ Slagmolen, JR Smith, ND Smith, RJE Smith, EJ Son, B Sorazu, F Sorrentino, T Souradeep, AK Srivastava, A Staley, M Steinke, J Steinlechner, S Steinlechner, D Steinmeyer, BC Stephens, R Stone, KA Strain, N Straniero, G Stratta, NA Strauss, S Strigin, R Sturani, AL Stuver, TZ Summerscales, L Sun, PJ Sutton, BL Swinkels, MJ Szczepańczyk, M Tacca, D Talukder, DB Tanner, M Tápai, SP Tarabrin, A Taracchini, R Taylor, T Theeg, MP Thirugnanasambandam, EG Thomas, M Thomas, P Thomas, KA Thorne, KS Thorne, E Thrane, S Tiwari, V Tiwari, KV Tokmakov, C Tomlinson, M Tonelli, CV Torres, CI Torrie, D Töyrä, F Travasso, G Traylor, D Trifirò, MC Tringali, L Trozzo, M Tse, M Turconi, D Tuyenbayev, D Ugolini, CS Unnikrishnan, AL Urban, SA Usman, H Vahlbruch, G Vajente, G Valdes, N van Bakel, M van Beuzekom, JFJ van den Brand, C Van Den Broeck, DC Vander-Hyde, L van der Schaaf, JV van Heijningen, AA van Veggel, M Vardaro, S Vass, M Vasúth, R Vaulin, A Vecchio, G Vedovato, J Veitch, PJ Veitch, K Venkateswara, D Verkindt, F Vetrano, A Viceré, S Vinciguerra, DJ Vine, J-Y Vinet, S Vitale, T Vo, H Vocca, C Vorvick, D Voss, WD Vousden, SP Vyatchanin, AR Wade, LE Wade, M Wade, M Walker, L Wallace, S Walsh, G Wang, H Wang, M Wang, X Wang, Y Wang, RL Ward, J Warner, M Was, B Weaver, L-W Wei, M Weinert, AJ Weinstein, R Weiss, T Welborn, L Wen, P Weßels, T Westphal, K Wette, JT Whelan, DJ White, BF Whiting, RD Williams, AR Williamson, JL Willis, B Willke, MH Wimmer, W Winkler, CC Wipf, H Wittel, G Woan, J Worden, JL Wright, G Wu, J Yablon, W Yam, H Yamamoto, CC Yancey, MJ Yap, H Yu, M Yvert, A Zadrożny, L Zangrando, M Zanolin, J-P Zendri, M Zevin, F Zhang, L Zhang, M Zhang, Y Zhang, C Zhao, M Zhou, Z Zhou, XJ Zhu, ME Zucker, SE Zuraw, J Zweizig, J Allison, K Bannister, ME Bell, S Chatterjee, AP Chippendale, PG Edwards, L Harvey-Smith, Ian Heywood, A Hotan, B Indermuehle, J Marvil, D McConnell, T Murphy, A Popping, J Reynolds, RJ Sault, MA Voronkov, MT Whiting, AJ Castro-Tirado, R Cunniffe, M Jelínek, JC Tello, SR Oates, Y-D Hu, P Kubánek, S Guziy, A Castellón, A García-Cerezo, VF Muñoz, C Pérez del Pulgar, S Castillo-Carrión, JM Castro Cerón, R Hudec, MD Caballero-García, P Páta, S Vitek, JA Adame, S Konig, F Rendón, T de J Mateo Sanguino, R Fernández-Muñoz, PC Yock, N Rattenbury, WH Allen, R Querel, S Jeong, IH Park, J Bai, Ch Cui, Y Fan, Ch Wang, D Hiriart, WH Lee, A Claret, R Sánchez-Ramírez, SB Pandey, T Mediavilla, L Sabau-Graziati, TMC Abbott, FB Abdalla, S Allam, J Annis, R Armstrong, A Benoit-Lévy, E Berger, RA Bernstein, E Bertin, D Brout, E Buckley-Geer, DL Burke, D Capozzi, J Carretero, FJ Castander, R Chornock, PS Cowperthwaite, M Crocce, CE Cunha, CB D'Andrea, LN da Costa, S Desai, HT Diehl, JP Dietrich, Z Doctor, A Drlica-Wagner, MR Drout, TF Eifler, J Estrada, AE Evrard, E Fernandez, DA Finley, B Flaugher, RJ Foley, W-F Fong, P Fosalba, DB Fox, J Frieman, CL Fryer, E Gaztanaga, DW Gerdes, DA Goldstein, D Gruen, RA Gruendl, G Gutierrez, K Herner, K Honscheid, DJ James, MD Johnson, MWG Johnson, I Karliner, D Kasen, S Kent, R Kessler, AG Kim, MC Kind, K Kuehn, N Kuropatkin, O Lahav, TS Li, M Lima, H Lin, MAG Maia, R Margutti, J Marriner, P Martini, T Matheson, P Melchior, BD Metzger, CJ Miller, R Miquel, E Neilsen, RC Nichol, B Nord, P Nugent, R Ogando, D Petravick, AA Plazas, E Quataert, N Roe, AK Romer, A Roodman, AC Rosell, ES Rykoff, M Sako, E Sanchez, V Scarpine, R Schindler, M Schubnell, D Scolnic, I Sevilla-Noarbe, E Sheldon, N Smith, RC Smith, M Soares-Santos, F Sobreira, A Stebbins, E Suchyta, MEC Swanson, G Tarle, J Thaler, D Thomas, RC Thomas, DL Tucker, V Vikram, AR Walker, RH Wechsler, W Wester, B Yanny, Y Zhang, J Zuntz, V Connaughton, E Burns, A Goldstein, MS Briggs, B-B Zhang, CM Hui, P Jenke, CA Wilson-Hodge, PN Bhat, E Bissaldi, W Cleveland, G Fitzpatrick, MM Giles, MH Gibby, J Greiner, A von Kienlin, RM Kippen, S McBreen, B Mailyan, CA Meegan, WS Paciesas, RD Preece, O Roberts, L Sparke, M Stanbro, K Toelge, P Veres, H-F Yu, L Blackburn, M Ackermann, M Ajello, A Albert, B Anderson, WB Atwood, M Axelsson, L Baldini, G Barbiellini, D Bastieri, R Bellazzini, E Bissaldi, RD Blandford, ED Bloom, R Bonino, E Bottacini, TJ Brandt, P Bruel, S Buson, GA Caliandro, RA Cameron, M Caragiulo, PA Caraveo, E Cavazzuti, E Charles, A Chekhtman, J Chiang, G Chiaro, S Ciprini, J Cohen-Tanugi, LR Cominsky, F Costanza, A Cuoco, F D'Ammando, F de Palma, R Desiante, SW Digel, N Di Lalla, M Di Mauro, L Di Venere, A Domínguez, PS Drell, R Dubois, C Favuzzi, EC Ferrara, A Franckowiak, Y Fukazawa, S Funk, P Fusco, F Gargano, D Gasparrini, N Giglietto, P Giommi, F Giordano, M Giroletti, T Glanzman, G Godfrey, GA Gomez-Vargas, D Green, IA Grenier, JE Grove, S Guiriec, D Hadasch, AK Harding, E Hays, JW Hewitt, AB Hill, D Horan, T Jogler, G Jóhannesson, AS Johnson, S Kensei, D Kocevski, M Kuss, G La Mura, S Larsson, L Latronico, J Li, L Li, F Longo, F Loparco, MN Lovellette, P Lubrano, J Magill, S Maldera, A Manfreda, M Marelli, M Mayer, MN Mazziotta, JE McEnery, M Meyer, PF Michelson, N Mirabal, T Mizuno, AA Moiseev, ME Monzani, E Moretti, A Morselli, IV Moskalenko, M Negro, E Nuss, T Ohsugi, N Omodei, M Orienti, E Orlando, JF Ormes, D Paneque, JS Perkins, M Pesce-Rollins, F Piron, G Pivato, TA Porter, JL Racusin, S Rainò, R Rando, S Razzaque, A Reimer, O Reimer, D Salvetti, PM Saz Parkinson, C Sgrò, D Simone, EJ Siskind, F Spada, G Spandre, P Spinelli, DJ Suson, H Tajima, JB Thayer, DJ Thompson, L Tibaldo, DF Torres, E Troja, Y Uchiyama, TM Venters, G Vianello, KS Wood, M Wood, S Zhu, S Zimmer, E Brocato, E Cappellaro, S Covino, A Grado, L Nicastro, E Palazzi, E Pian, L Amati, LA Antonelli, M Capaccioli, P D'Avanzo, V D'Elia, F Getman, G Giuffrida, G Iannicola, L Limatola, M Lisi, S Marinoni, P Marrese, A Melandri, S Piranomonte, A Possenti, L Pulone, A Rossi, A Stamerra, L Stella, V Testa, L Tomasella, S Yang, A Bazzano, E Bozzo, S Brandt, TJ-L Courvoisier, C Ferrigno, L Hanlon, E Kuulkers, P Laurent, S Mereghetti, JP Roques, V Savchenko, P Ubertini, MM Kasliwal, LP Singer, Y Cao, G Duggan, SR Kulkarni, V Bhalerao, AA Miller, T Barlow, E Bellm, I Manulis, J Rana, R Laher, F Masci, J Surace, U Rebbapragada, D Cook, A Van Sistine, B Sesar, D Perley, R Ferreti, T Prince, R Kendrick, A Horesh, K Hurley, SV Golenetskii, RL Aptekar, DD Frederiks, DS Svinkin, A Rau, A von Kienlin, X Zhang, DM Smith, T Cline, H Krimm, F Abe, M Doi, K Fujisawa, KS Kawabata, T Morokuma, K Motohara, M Tanaka, K Ohta, K Yanagisawa, M Yoshida, C Baltay, D Rabinowitz, N Ellman, S Rostami, DF Bersier, MF Bode, CA Collins, CM Copperwheat, MJ Darnley, DK Galloway, A Gomboc, S Kobayashi, P Mazzali, CG Mundell, AS Piascik, Don Pollacco, IA Steele, K Ulaczyk, JW Broderick, RP Fender, PG Jonker, A Rowlinson, BW Stappers, RAMJ Wijers, V Lipunov, E Gorbovskoy, N Tyurina, V Kornilov, P Balanutsa, A Kuznetsov, D Buckley, R Rebolo, M Serra-Ricart, G Israelian, NM Budnev, O Gress, K Ivanov, V Poleshuk, A Tlatov, V Yurkov, N Kawai, M Serino, H Negoro, S Nakahira, T Mihara, H Tomida, S Ueno, H Tsunemi, M Matsuoka, S Croft, L Feng, TMO Franzen, BM Gaensler, M Johnston-Hollitt, DL Kaplan, MF Morales, SJ Tingay, RB Wayth, A Williams, SJ Smartt, KC Chambers, KW Smith, ME Huber, DR Young, DE Wright, A Schultz, L Denneau, H Flewelling, EA Magnier, N Primak, A Rest, A Sherstyuk, B Stalder, CW Stubbs, J Tonry, C Waters, M Willman, F Olivares E., H Campbell, R Kotak, J Sollerman, M Smith, M Dennefeld, JP Anderson, MT Botticella, T-W Chen, MD Valle, N Elias-Rosa, M Fraser, C Inserra, E Kankare, T Kupfer, J Harmanen, L Galbany, L Le Guillou, JD Lyman, K Maguire, A Mitra, M Nicholl, A Razza, G Terreran, S Valenti, A Gal-Yam, A Ćwiek, M Ćwiok, L Mankiewicz, R Opiela, M Zaremba, AF Żarnecki, CA Onken, RA Scalzo, BP Schmidt, C Wolf, F Yuan, PA Evans, JA Kennea, DN Burrows, S Campana, SB Cenko, P Giommi, FE Marshall, J Nousek, P O'Brien, JP Osborne, D Palmer, M Perri, M Siegel, G Tagliaferri, A Klotz, D Turpin, R Laugier, M Beroiz, T Peñuela, LM Macri, RJ Oelkers, DG Lambas, R Vrech, J Cabral, C Colazo, M Dominguez, B Sanchez, S Gurovich, M Lares, JL Marshall, DL DePoy, N Padilla, NA Pereyra, M Benacquista, NR Tanvir, K Wiersema, AJ Levan, D Steeghs, J Hjorth, JPU Fynbo, D Malesani, B Milvang-Jensen, D Watson, M Irwin, CG Fernandez, RG McMahon, M Banerji, E Gonzalez-Solares, S Schulze, A de U Postigo, CC Thoene, Z Cano, S Rosswog

The atlas 3D Project – XXXI. Nuclear radio emission in nearby early-type galaxies

Monthly Notices of the Royal Astronomical Society Oxford University Press 458:2 (2016) 2221-2268

Authors:

K Nyland, LM Young, JM Wrobel, M Sarzi, R Morganti, K Alatalo, L Blitz, F Bournaud, Martin Bureau, M Cappellari, AF Crocker, RL Davies, TA Davis, PT de Zeeuw, P-A Duc, E Emsellem, S Khochfar, D Krajnović, H Kuntschner, RM McDermid, T Naab, T Oosterloo, N Scott, P Serra, A-M Weijmans

Abstract:

We present the results of a high-resolution, 5 GHz, Karl G. Jansky Very Large Array study of the nuclear radio emission in a representative subset of the ATLAS3D survey of early-type galaxies (ETGs). We find that 51 ± 4 per cent of the ETGs in our sample contain nuclear radio emission with luminosities as low as 1018 W Hz-1. Most of the nuclear radio sources have compact (≲25-110 pc) morphologies, although ~10 per cent display multicomponent core+jet or extended jet/lobe structures. Based on the radio continuum properties, as well as optical emission line diagnostics and the nuclear X-ray properties, we conclude that the majority of the central 5 GHz sources detected in the ATLAS3D galaxies are associated with the presence of an active galactic nucleus (AGN). However, even at subarcsecond spatial resolution, the nuclear radio emission in some cases appears to arise from low-level nuclear star formation rather than an AGN, particularly when molecular gas and a young central stellar population is present. This is in contrast to popular assumptions in the literature that the presence of a compact, unresolved, nuclear radio continuum source universally signifies the presence of an AGN. Additionally, we examine the relationships between the 5 GHz luminosity and various galaxy properties including the molecular gas mass and - for the first time - the global kinematic state. We discuss implications for the growth, triggering, and fuelling of radio AGNs, as well as AGN-driven feedback in the continued evolution of nearby ETGs.

Orbital and superorbital variability of LS I +61 303 at low radio frequencies with GMRT and LOFAR

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 456:2 (2016) 1791-1802

Authors:

B Marcote, M Ribó, JM Paredes, CH Ishwara-Chandra, JD Swinbank, JW Broderick, S Markoff, R Fender, RAMJ Wijers, GG Pooley, AJ Stewart, ME Bell, RP Breton, D Carbone, S Corbel, J Eislöffel, H Falcke, J-M Grie smeier, M Kuniyoshi, M Pietka, A Rowlinson, M Serylak, AJ van der Horst, J van Leeuwen, MW Wise, P Zarka