Browsing by Author "Stevens, Jason"

Now showing items 1-20 of 61

    • A 1200um MAMBO Survey of the ELAIS N2 and Lockman Hole East Fields 

      Greve, T.R.; Ivison, R.J.; Bertoldi, F.; Stevens, Jason; Chapman, S. C.; Smail, I.; Blain, A.W. (Springer Nature, 2005)
      Using the MPIfR Max Planck Millimeter Bolometer array (MAMBO) on the IRAM 30m Telescope we have mapped the ELAIS N2 and Lockman Hole East Fields at 1200 μm to a rms noise level of 0.8–1.0 mJy per 11″ beam. The areas surveyed ...

    • The 1993 multiwavelength campaign on 3C 279 : the radio to gamma-ray energy distribution inlow state 

      Maraschi, L.; Grandi, P.; Urry, C.M.; Wehrle, A. E.; Madejski, G.M.; Fink, H.; Ghisellini, G.; Hartman, R.C.; Koratkar, A.P.; von Montigny, C.; Pian, E.; Thomas, H.C.; Treves, A.; Aller, M. F.; Aller, H. D.; Bailyn, C. D.; Balonek, T.J.; Bock, H.; Collmar, W.; Glass, I.S.; Litchfield, S.J.; McHardy, I.M.; Mendez, R.; Pesce, J.; Reuter, H.-P.; Robson, E.I.; Steppe, H.; Stevens, Jason; Teraesranta, H.; Wagner, S.J. (1994-11-01)
      Simultaneous observations of 3C 279 at radio, millimeter, near-infrared, optical, ultraviolet (with IUE) and X-ray (with ROSAT) wavelengths were obtained in 1992 December-1993 January, during a three week pointing at the ...

    • 350um SHARC-II imaging of luminous high-redshift radio galaxies 

      Greve, T.~R.; Ivison, R.~J.; Stevens, Jason (2006-03-01)

    • 3C 279 Multiwavelength Monitoring II : The Ground-based Campaign 

      Grandi, P.; Urry, C.M.; Maraschi, L.; Wehrle, A. E.; Madejski, G. M.; Aller, M. F.; Aller, H. D.; Bailyn, C. D.; Balonek, T.J.; Bock, T. H.; Glass, I. S.; Litchfield, S.J.; McHardy, I.M.; Mulchaey, J. S.; Reuter, H.-P.; Robson, E. I.; Sadun, A. C.; Sherry, W.; Steppe, H.; Stevens, Jason; Teraesranta, H.; Tornikoski, M.; Wagner, S.J. (1996-03-01)
      The optically violently variable quasar 3C 279 was monitored simultaneously from radio to y-ray frequencies in 1992 December-1993 January. We report a detailed study of the ground-based results from radio to optical ...

    • The central region of spiral galaxies as seen by Herschel. M 81, M 99, and M 100 

      Sauvage, M.; Sacchi, N.; Bendo, G. J.; Boselli, A.; Pohlen, M.; Wilson, C. D.; Auld, R.; Baes, M.; Barlow, M. J.; Bock, J. J.; Bradford, M.; Buat, V.; Castro-Rodriguez, N.; Chanial, P.; Charlot, S.; Ciesla, L.; Clements, D. L.; Cooray, A.; Cormier, D.; Cortese, L.; Davies, J. I.; Dwek, E.; Eales, S. A.; Elbaz, D.; Galametz, M.; Galliano, F.; Gear, W. K.; Glenn, J.; Gomez, H. L.; Griffin, M.; Hony, S.; Isaak, K. G.; Levenson, L. R.; Lu, N.; Madden, S. C.; O'Halloran, B.; Okumura, K.; Oliver, S.; Page, M. J.; Panuzzo, P.; Papageorgiou, A.; Parkin, T. J.; Perez-Fournon, I.; Rangwala, N.; Rigby, E. E.; Roussel, H.; Rykala, A.; Schulz, B.; Schirm, M. R. P.; Smith, M. W. L.; Spinoglio, L.; Stevens, Jason; Srinivasan, S.; Symeonidis, M.; Trichas, M.; Vaccari, M.; Vigroux, L.; Wozniak, H.; Wright, G. S.; Zeilinger, W.W. (2010-07-01)
      With appropriate spatial resolution, images of spiral galaxies in thermal infrared (~10 micron and beyond) often reveal a bright central component, distinct from the stellar bulge, superimposed on a disk with prominent ...

    • Cold dust and young starbursts : spectral energy distributions of Herschel SPIRE sources from the HerMES survey 

      Rowan-Robinson, M.; Roseboom, I.G.; Vaccari, M.; Amblard, A.; Arumugam, V.; Auld, R.; Aussel, H.; Babbedge, T.; Blain, A.; Bock, J.; Boselli, A.; Brisbin, D.; Buat, V.; Burgarella, D.; Castro-Rodriguez, N.; Cava, A.; Chanial, P.; Clements, D. L.; Conley, A.; Conversi, L.; Cooray, A.; Dowell, C.D.; Dwek, E.; Dye, S.; Eales, S.; Elbaz, D.; Farrah, D.; Fox, M.; Franceschini, A.; Gear, W.; Glenn, J.; González Solares, E.A.; Griffin, M.; Halpern, M.; Hatziminaoglou, E.; Huang, J.; Ibar, E.; Isaak, K.; Ivison, Rob J.; Lagache, G.; Levenson, L.; Lu, N.; Madden, S.; Maffei, B.; Mainetti, G.; Marchetti, L.; Mortier, Angela M. J.; Nguyen, H.T.; O'Halloran, B.; Oliver, S.J.; Omont, A.; Page, M. J.; Panuzzo, P.; Papageorgiou, A.; Patel, H.; Pearson, C.P.; Perez Fournon, I.; Pohlen, M.; Rawlings, J.I.; Raymond, G.; Rigopoulou, D.; Rizzo, D.; Schulz, B.; Scott, D.; Seymour, N.; Shupe, D. L.; Smith, A. J.; Stevens, Jason; Symeonidis, M.; Trichas, M.; Tugwell, K.E.; Valtchanov, I.; Vigroux, L.; Wang, L.; Ward, R.; Wright, G.; Xu, C.K.; Zemcov, M. (2010-11-01)
      We present spectral energy distributions (SEDs) for 68 Herschel sources detected at 5σ at 250, 350 and 500 μm in the HerMES SWIRE-Lockman field. We explore whether existing models for starbursts, quiescent star-forming ...

    • A Comparison of the Centimetre-to-Submillimetre Continuum Spectra of BL Lacertae 

      Stevens, Jason; Litchfield, S.J.; Robson, E.I.; Gear, W.K.; Hughes, D.H. (Kluwer, 1994)

    • A Comparison of the Radio / Submillimetre Spectra of Bl-Lacertae Objects and Flat Spectrum Radio Quasars 

      Gear, W.K.; Stevens, Jason; Hughes, D.H.; Litchfield, S.J.; Robson, E.I.; Terasranta, H.; Valtaoja, E.; Steppe, H.; Aller, M. F.; Aller, H. D. (1994-03-01)
      We present quasi-simultaneous radio, millimetre and submillimetre spectra of 22 BL Lac objects and 24 radio-loud, violently variable quasars. These data are used to test the hypothesis that BL Lacs and OVV quasars are ...

    • The Deep SPIRE HerMES Survey: spectral energy distributions and their astrophysical indications at high redshift 

      Brisbin, D.; Harwit, M.; Altieri, B.; Amblard, A.; Arumugam, V.; Aussel, H.; Babbedge, T.; Blain, A.; Bock, J.; Boselli, A.; Buat, V.; Castro-Rodríguez, N.; Cava, A.; Chanial, P.; Clements, D. L.; Conley, A.; Conversi, L.; Cooray, A.; Dowell, C.D.; Dwek, E.; Eales, S.; Elbaz, D.; Fox, M.; Franceschini, A.; Gear, W.; Glenn, J.; Griffin, M.; Halpern, M.; Hatziminaoglou, E.; Ibar, E.; Isaak, K.; Ivison, Rob J.; Lagache, G.; Levenson, L.; Lonsdale, C.J.; Lu, N.; Madden, S.; Maffei, B.; Mainetti, G.; Marchetti, L.; Morrison, G.E.; Nguyen, H.T.; O'Halloran, B.; Oliver, S.J.; Omont, A.; Owen, F.N.; Pannella, M.; Panuzzo, P.; Papageorgiou, A.; Pearson, C.P.; Pérez-Fournon, I.; Pohlen, M.; Rizzo, D.; Roseboom, I.G.; Rowan-Robinson, M.; Portal, M.S.; Schulz, B.; Seymour, N.; Shupe, D. L.; Smith, A.J.; Stevens, Jason; Strazzullo, V.; Symeonidis, M.; Trichas, M.; Tugwell, K.E.; Vaccari, M.; Valtchanov, I.; Vigroux, L.; Wang, L.; Ward, R.; Wright, G.; Xu, C.K.; Zemcov, M. (2010-11-01)
      We present the cross-identification and source photometry techniques used to process Herschel SPIRE imaging taken as part of the Herschel Multi-Tiered Extragalactic Survey (HerMES). Cross-identifications are performed in ...

    • The dust morphology of the elliptical Galaxy M 86 with SPIRE 

      Gomez, H.L.; Baes, M.; Cortese, L.; Smith, M. W. L.; Boselli, A.; Ciesla, L.; Bendo, G. J.; Pohlen, M.; di Serego Alighieri, S.; Auld, R.; Barlow, M.J.; Bock, J. J.; Bradford, M.; Buat, V.; Castro-Rodriguez, N.; Chanial, P.; Charlot, S.; Clements, D. L.; Cooray, A.; Cormier, D.; Davies, J. I.; Dwek, E.; Eales, S.; Elbaz, D.; Galametz, M.; Galliano, F.; Gear, W.K.; Glenn, J.; Griffin, M.; Hony, S.; Isaak, K.G.; Levenson, L. R.; Lu, N.; Madden, S.; O'Halloran, B.; Okumura, K.; Oliver, S.; Page, M.J.; Panuzzo, P.; Papageorgiou, A.; Parkin, T.J.; Perez-Fournon, I.; Rangwala, N.; Rigby, E. E.; Roussel, H.; Rykala, A.; Sacchi, N.; Sauvage, M.; Schirm, M. R. P.; Schulz, B.; Spinoglio, L.; Srinivasan, S.; Stevens, Jason; Symeonidis, M.; Trichas, M.; Vaccari, M.; Vigroux, L.; Wilson, C.D.; Wozniak, H.; Wright, G.S.; Zeilinger, W.W. (2010-07-01)
      We present Herschel-SPIRE observations at 250–500 μm of the giant elliptical galaxy M 86 and examine the distribution of the resolved cold dust emission and its relation with other galactic tracers. The SPIRE images reveal ...

    • Evidence for a maximum jet efficiency for the most powerful radio galaxies 

      Fernandes, C.A.C.; Jarvis, M.J.; Rawlings, S.; Martinez-Sansigre, A.; Hatziminaoglou, E.; Lacy, M.; Page, M.J.; Stevens, Jason; Vardoulaki, E. (2011-03)
      We use new mid-infrared (mid-IR) photometry from the Spitzer Space Telescope to study the relations between low-frequency radio luminosity density L-nu 151 (MHz), mid-IR (12 mu m rest frame) luminosity nu L-nu 12 (mu m) ...

    • Evidence that the AGN dominates the radio emission in z ~ 1 radio-quiet quasars 

      White, Sarah V.; Jarvis, Matt J.; Kalfountzou, Eleni; Hardcastle, Martin; Verma, Aprajita; Orjales, José M. Cao; Stevens, Jason (2017-02-02)
      In order to understand the role of radio-quiet quasars (RQQs) in galaxy evolution, we must determine the relative levels of accretion and star-formation activity within these objects. Previous work at low radio flux-densities ...

    • Evolution of dust temperature of galaxies through cosmic time as seen by Herschel 

      Hwang, H. S.; Elbaz, D.; Magdis, G.; Daddi, E.; Symeonidis, M.; Altieri, B.; Amblard, A.; Andreani, P.; Arumugam, V.; Auld, R.; Aussel, H.; Babbedge, T.; Berta, S.; Blain, A.; Bock, J.; Bongiovanni, A.; Boselli, A.; Buat, V.; Burgarella, D.; Castro-Rodríguez, N.; Cava, A.; Cepa, J.; Chanial, P.; Chapin, E.; Chary, R.; Cimatti, A.; Clements, D. L.; Conley, A.; Conversi, L.; Cooray, A.; Dannerbauer, H.; Dickinson, M.; Dominguez, H.; Dowell, C.D.; Dunlop, James S.; Dwek, E.; Eales, S.; Farrah, D.; Schreiber, N. F.; Fox, M.; Franceschini, A.; Gear, W.; Genzel, R.; Glenn, J.; Griffin, M.; Gruppioni, C.; Halpern, M.; Hatziminaoglou, E.; Ibar, E.; Isaak, K.; Ivison, Rob J.; Jeong, W.-S.; Lagache, G.; Le Borgne, D.; Le Floc'h, E.; Lee, H.M.; Lee, J.C.; Lee, M.G.; Levenson, L.; Lu, N.; Lutz, D.; Madden, S.; Maffei, B.; Magnelli, B.; Mainetti, G.; Maiolino, R.; Marchetti, L.; Mortier, Angela M. J.; Nguyen, H.T.; Nordon, R.; O'Halloran, B.; Okumura, K.; Oliver, S.J.; Omont, A.; Page, M. J.; Panuzzo, P.; Papageorgiou, A.; Pearson, C.P.; Pérez-Fournon, I.; García, A.M.P.; Poglitsch, A.; Pohlen, M.; Popesso, P.; Pozzi, F.; Rawlings, J.I.; Rigopoulou, D.; Riguccini, L.; Rizzo, D.; Rodighiero, G.; Roseboom, I.G.; Rowan-Robinson, M.; Saintonge, A.; Portal, M.S.; Santini, P.; Sauvage, M.; Schulz, B.; Scott, D.; Seymour, N.; Shao, L.; Shupe, D. L.; Smith, A.J.; Stevens, Jason; Sturm, E.; Tacconi, L.; Trichas, M.; Tugwell, K.E.; Vaccari, M.; Valtchanov, I.; Vieira, J. D.; Vigroux, L.; Wang, L.; Ward, R.; Wright, G.; Xu, C.K.; Zemcov, M. (2010-11-01)

    • The Evolution of the Centimeter-Submillimeter Spectrum of 3C 345 during Outburst 

      Stevens, Jason; Litchfield, S.J.; Robson, E.I.; Cawthorne, T.V.; Aller, M. F.; Aller, H. D.; Hughes, P.A.; Wright, M.C.H. (1996-07-01)
      Monitoring data between 375 and 4.8 GHz are presented for the blazar 3C 345 between 1989 and 1995, during which period the source flared. The multifrequency light curves are used to construct snap-shot spectra that span ...

    • The far-infrared/radio correlation as probed by Herschel 

      Ivison, R.J.; Magnelli, B.; Ibar, E.; Andreani, P.; Elbaz, D.; Altieri, B.; Amblard, A.; Arumugam, V.; Auld, R.; Aussel, H.; Babbedge, T.; Berta, S.; Blain, A.; Bock, J.; Bongiovanni, A.; Boselli, A.; Buat, V.; Burgarella, D.; Castro-Rodríguez, N.; Cava, A.; Cepa, J.; Chanial, P.; Cimatti, A.; Cirasuolo, M.; Clements, D. L.; Conley, A.; Conversi, L.; Cooray, A.; Daddi, E.; Dominguez, H.; Dowell, C.D.; Dwek, E.; Eales, S.; Farrah, D.; Förster Schreiber, N.; Fox, M.; Franceschini, A.; Gear, W.; Genzel, R.; Glenn, J.; Griffin, M.; Gruppioni, C.; Halpern, M.; Hatziminaoglou, E.; Isaak, K.; Lagache, G.; Levenson, L.; Lu, N.; Lutz, D.; Madden, S.; Maffei, B.; Magdis, G.; Mainetti, G.; Maiolino, R.; Marchetti, L.; Morrison, G.E.; Mortier, A.M.J.; Nguyen, H.T.; Nordon, R.; O'Halloran, B.; Oliver, S. J.; Omont, A.; Owen, F. N.; Page, M.J.; Panuzzo, P.; Papageorgiou, A.; Pearson, C.P.; Pérez-Fournon, I.; Pérez García, A.M.; Poglitsch, A.; Pohlen, M.; Popesso, P.; Pozzi, F.; Rawlings, J.I.; Raymond, G.; Rigopoulou, D.; Riguccini, L.; Rizzo, D.; Rodighiero, G.; Roseboom, I.G.; Rowan-Robinson, M.; Saintonge, A.; Sanchez Portal, M.; Santini, P.; Schulz, B.; Scott, D.; Seymour, N.; Shao, L.; Shupe, D. L.; Stevens, Jason; Sturm, E.; Symeonidis, M.; Tacconi, L.; Trichas, M.; Tugwell, K.E.; Vaccari, M.; Valtchanov, I.; Vieira, J.; Vigroux, L.; Wang, L.; Ward, R.; Wright, G.; Xu, C.K.; Zemcov, M. (2010-07-01)

    • First results from HerMES on the evolution of the submillimetre luminosity function 

      Eales, S.A.; Raymond, G.; Roseboom, I.G.; Altieri, B.; Amblard, A.; Arumugam, V.; Auld, R.; Aussel, H.; Babbedge, T.; Blain, A.; Bock, J.; Boselli, A.; Brisbin, D.; Buat, V.; Burgarella, D.; Castro-Rodríguez, N.; Cava, A.; Chanial, P.; Clements, D. L.; Conley, A.; Conversi, L.; Cooray, A.; Dowell, C.D.; Dwek, E.; Dye, S.; Elbaz, D.; Farrah, D.; Fox, M.; Franceschini, A.; Gear, W.; Glenn, J.; González Solares, E.A.; Griffin, M.; Harwit, M.; Hatziminaoglou, E.; Huang, J.; Ibar, E.; Isaak, K.; Ivison, R.J.; Lagache, G.; Levenson, L.; Lonsdale, C.J.; Lu, N.; Madden, S.; Maffei, B.; Mainetti, G.; Marchetti, L.; Morrison, G.E.; Mortier, A.M.J.; Nguyen, H.T.; O'Halloran, B.; Oliver, S.J.; Omont, A.; Owen, F.N.; Page, M.J.; Pannella, M.; Panuzzo, P.; Papageorgiou, A.; Pearson, C.P.; Pérez-Fournon, I.; Pohlen, M.; Rawlings, J.I.; Rigopoulou, D.; Rizzo, D.; Rowan-Robinson, M.; Sánchez Portal, M.; Schulz, B.; Scott, D.; Seymour, N.; Shupe, D. L.; Stevens, Jason; Strazzullo, V.; Symeonidis, M.; Trichas, M.; Tugwell, K.E.; Vaccari, M.; Valtchanov, I.; Vigroux, L.; Wang, L.; Ward, R.; Wright, G.; Xu, C.K.; Zemcov, M. (2010-07-01)
      We have carried out two extremely deep surveys with SPIRE, one of the two cameras on Herschel, at 250 μm, close to the peak of the far-infrared background. We have used the results to investigate the evolution of the ...

    • A flat trend of star-formation rate with X-ray luminosity of galaxies hosting AGN in the SCUBA-2 Cosmology Legacy Survey 

      Ramasawmy, Joanna; Stevens, Jason; Martin, Garreth; Geach, James E. (2019-07-01)
      Feedback processes from active galactic nuclei (AGN) are thought to play a crucial role in regulating star formation in massive galaxies. Previous studies using Herschel have resulted in conflicting conclusions as to whether ...

    • A Gamma-Ray Flare in NRAO 190 

      McGlynn, T. A.; Hartman, R. C.; Bloom, S. D.; Aller, M.; Aller, H.; Filippenko, A. V.; Barth, A. J.; Gear, W. K.; Marscher, A. P.; Mattox, J. R.; Reich, W.; Robson, E. I.; Schramm, J.; Stevens, Jason; Teraesranta, H.; Tornikoski, M.; Vestrand, W. T.; Wagner, S.; Heines, A. (1997-05-01)
      We describe observations of the quasi-stellar object (QSO) NRAO 190 during a gamma-ray flare from 1994 August 9 to 1994 August 29. This QSO was serendipitously detected by the EGRET instrument on the Compton Gamma Ray ...

    • GRB030115 submm upper limit. 

      Hoge, J. C.; Stevens, Jason; Moriarty-Schieven, G.; Tilanus, R. P. J. (2003)
      Observations have been made of the infrared afterglow candidate to GRB 030115 (GCN 1818) using the SCUBA bolometer array on the James Clerk Maxwell Telescope located on Mauna Kea, Hawaii. The observations took place on ...

    • The HerMES SPIRE submillimeter local luminosity function 

      Vaccari, M.; Marchetti, L.; Franceschini, A.; Altieri, B.; Amblard, A.; Arumugam, V.; Auld, R.; Aussel, H.; Babbedge, T.; Blain, A.; Bock, J.; Boselli, A.; Buat, V.; Burgarella, D.; Castro-Rodríguez, N.; Cava, A.; Chanial, P.; Clements, D.L.; Conley, A.; Conversi, L.; Cooray, A.; Dowell, C.D.; Dwek, E.; Dye, S.; Eales, S.; Elbaz, D.; Farrah, D.; Fox, M.; Gear, W.; Glenn, J.; González Solares, E.A.; Griffin, M.; Halpern, M.; Hatziminaoglou, E.; Huang, J.; Ibar, E.; Isaak, K.; Ivison, R.J.; Lagache, G.; Levenson, L.; Lu, N.; Madden, S.; Maffei, B.; Mainetti, G.; Mortier, A.M.J.; Nguyen, H.T.; O'Halloran, B.; Oliver, S.J.; Omont, A.; Page, M.J.; Panuzzo, P.; Papageorgiou, A.; Pearson, C.P.; Pérez-Fournon, I.; Pohlen, M.; Rawlings, J.I.; Raymond, G.; Rigopoulou, D.; Rizzo, D.; Rodighiero, G.; Roseboom, I.G.; Rowan-Robinson, M.; Sánchez Portal, M.; Schulz, B.; Scott, D.; Seymour, N.; Shupe, D.L.; Smith, A.J.; Stevens, Jason; Symeonidis, M.; Trichas, M.; Tugwell, K.E.; Valiante, E.; Valtchanov, I.; Vigroux, L.; Wang, L.; Ward, R.; Wright, G.; Xu, C.K.; Zemcov, M. (2010-07-01)
      Local luminosity functions are fundamental benchmarks for high-redshift galaxy formation and evolution studies as well as for models describing these processes. Determining the local luminosity function in the submillimeter ...