A big γ-ray burst at a redshift of z ≈ 8.2 (2009)
Tanvir, N. R., Fox, D. B., Levan, A. J., Berger, E., Wiersema, K., Fynbo, J. P. U., ...
4 pages, 3 figures.-- ArXiv pre-print available at: http://arxiv.org/abs/0906.1577
A γ-ray burst at a redshift of z ≈ 8.2 (2009)
Tanvir, N. R., Fox , D. B., Levan, A. J., Berger, E., Wiersema, K., Fynbo, J. P. U., ...
Long-duration γ-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z > 20 using...
Wang, Junfeng, Fabbiano, G., Karovska, M., Elvis, M., Risaliti, G., Zezas, A., ...
We report high resolution imaging of the nucleus of the Seyfert 1 galaxy NGC 4151 obtained with a 50 ks Chandra HRC observation. The HRC image resolves the emission on spatial scales of 0.5", ~30 pc,...
Radio Variability in Seyfert Nuclei (2009)
Mundell, C. G., Ferruit, P., Nagar, N., Wilson, A. S.
Comparison of 8.4-GHz radio images of a sample of 11 early-type Seyfert galaxies with previous observations reveals possible variation in the nuclear radio flux density in 5 of them over a 7-yr...
Rise and fall of the X-ray flash 080330: an off-axis jet? (2009)
Guidorzi, C., Clemens, C., Kobayashi, S., Granot, J., Melandri, A., D'Avanzo, P., ...
X-ray flashes (XRFs) are a class of gamma-ray bursts (GRBs) with the peak energy of the time-integrated spectrum, Ep, below 30 keV, whereas classical GRBs have Ep of a few hundreds keV. Apart from Ep...
Melandri, A., Guidorzi, C., Kobayashi, S., Bersier, D., Mundell, C. G., Milne, P., ...
We present a comprehensive multiwavelength temporal and spectral analysis of the FRED GRB 070419A. The early-time emission in the $\gamma$-ray and X-ray bands can be explained by a central engine...
Rise and fall of the X-ray flash 080330: an off-axis jet? (2009)
Guidorzi, C., Clemens, C., Kobayashi, S., Granot, J., Melandri, A., D'Avanzo, P., ...
Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory (ESO). DOI: 10.1051/0004-6361/200911719
Rise and fall of the X-ray flash 080330: an off-axis jet? (2009)
Guidorzi, C., Clemens, C., Kobayashi, S., Granot, J., Melandri, A., D'Avanzo, P., ...
Molecular gas and dust in Arp 94: The formation of a recycled galaxy in an interacting system (2008)
Lisenfeld, U., Mundell, C. G., Schinnerer, E., Appleton, P. N., Allsopp, J.
We present new results for the molecular gas, dust emission, and the ionized gas in J1023+1952, an H I-rich intergalactic star-forming tidal dwarf galaxy candidate. It is located at the projected...
Molecular gas and dust in Arp 94: The formation of a recycled galaxy in an interacting system (2008)
Lisenfeld, U., Mundell, C. G., Schinnerer, E., Appleton, P. N., Allsopp, J.
We present new results for the molecular gas, dust emission, and the ionized gas in J1023+1952, an H I-rich intergalactic star-forming tidal dwarf galaxy candidate. It is located at the projected...
Molecular gas and dust in Arp 94: The formation of a recycled galaxy in an interacting system (2008)
Lisenfeld, U., Mundell, C. G., Schinnerer, E., Appleton, P. N., Allsopp, J.
We present new results for the molecular gas, dust emission and the ionized gas in J1023+1952, an HI rich intergalactic star-forming tidal dwarf galaxy candidate. It is located at the projected...
Gomboc, A., Kobayashi, S., Guidorzi, C., Melandri, A., Mangano, V., Sbarufatti, B., ...
We present a detailed study of the prompt and afterglow emission from Swift GRB 061126 using BAT, XRT, UVOT data and multi-color optical imaging from ten ground-based telescopes. GRB 061126 was a...
The Early-time Optical Properties of Gamma-Ray Burst Afterglows (2008)
Melandri, A., Mundell, C. G., Kobayashi, S., Guidorzi, C., Gomboc, A., Steele, I. A., ...
We present a multiwavelength analysis of 63 Gamma-Ray Bursts observed with the world's three largest robotic optical telescopes, the Liverpool and Faulkes Telescopes (North and South). Optical...
The Early-Time Optical Properties of Gamma-Ray Burst Afterglows. (2008)
Melandri, A., Mundell, C.G., Kobayashi, S., Guidorzi, C., Gomboc, A., Steele, I.A., ...
Original article can be found at: http://www.iop.org/EJ/journal/apj Copyright American Astronomical Society DOI: 10.1086/591243 [Full text of this article is not available in the UHRA]
Molecular gas and dust in Arp 94: the formation of a recycled galaxy in an interacting system (2008)
Lisenfeld, U., Mundell, C. G., Schinnerer, E., Appleton, P. N., Allsopp, J.
We present new results for the molecular gas, dust emission, and the ionized gas in J1023+1952, an H I-rich intergalactic star-forming tidal dwarf galaxy candidate. It is located at the projected...
Feeding active galaxies: gas dynamics from the outskirts to the very center (2008)
Haan, S., Schinnerer, E., Mundell, C. G., Combes, F., GarcÃa-Burillo, S., Emsellem, E.
We analyze the gas dynamics of 16 nearby spiral galaxies. The H I gas distributions and kinematics indicate that some properties of the atomic gas correlate with the type of the AGN present....
Feeding black holes: tracing gas flows from the outskirts to the centers of galaxies (2008)
Haan, S., Schinnerer, E., Mundell, C. G., Combes, F., García-Burillo, S., Emsellem, E.
We analyzed the distribution and kinematics of the atomic gas (HI) in 16 nearby spiral galaxies. Our results indicate that the morphology of the atomic gas and dynamically disturbed outer disks...
The role of the host galaxy kinematics on nuclear activity (2008)
Dumas, G., Mundell, C. G., Emsellem, E., Nagar, N.
We investigate the kinematic properties of the stars and ionised gas in the circumnuclear regions of a matched sample of nearby Seyfert and non-active galaxies, using the SAURON Integral-Field Unit...
Gomboc, A., Kobayashi, S., Guidorzi, C., Melandri, A., Mangano, V., Sbarufatti, B., ...
We present a detailed study of the prompt and afterglow emission from Swift GRB 061126 using BAT, XRT, UVOT data and multicolor optical imaging from 10 ground-based telescopes. GRB 061126 was a long...
R. Schilizzi, S. Vogel, F. Paresce, M. Elvis, J. M. Wrobel, J. S. Ulvestad, ...
What causes the dichotomy between very powerful and very weak radio emission from AGNs? Perhaps the engines are the same but the jets get disrupted by dense ISM in radio-quiet objects, or else the...
Free-Free Absorption On Parsec Scales In Seyfert Galaxies. (2007)
A.L. Roy, J. S. Ulvestad, A. S. Wilson, C. G. Mundell, J. M. Wrobel, ...
2 10 5 cm 3 assuming a path length of 0.1 pc, typical of that expected at the inner edge of the obscuring torus. 1 Introduction Sensitivity of VLBI is constantly improving, and the recent advent of...
Between H, G. B. Taylor, A. B. Peck, C. Henkel, H. Falcke, C. G. Mundell, ...
We report on the discovery of H i in absorption toward the gigamaser galaxy TXS 2226-184 using the VLA. The absorption appears to consist of two components { one with a width of 125 km s , and one...
Atomic Hydrogen Properties of AGN Host Galaxies: HI in 16 NUclei of GAlaxies (NUGA) Sources (2007)
Haan, S., Schinnerer, E., Mundell, C. G., Garcia-Burillo, S., Combes, F.
We present a comprehensive spectroscopic imaging survey of the distribution and kinematics of atomic hydrogen (HI) in 16 nearby spiral galaxies hosting low luminosity AGN, observed with high spectral...
Are galaxies with AGN a transition population? (2007)
Westoby, P. B., Mundell, C. G., Baldry, I. K.
We present the results of an analysis of a well-selected sample of galaxies with active and inactive galactic nuclei from the Sloan Digital Sky Survey, in the range 0.01 < z < 0.16. The SDSS galaxy...
Ruiz-Velasco, A. E., Swan, H., Troja, E., Malesani, D., Fynbo, J. P. U., Starling, R. L. C., ...
We report on follow-up observations of the GRB 060927 using the ROTSE-IIIa telescope and a suite of larger aperture ground-based telescopes. An optical afterglow was detected 20 s after the burst,...
GRB 060206 and the quandary of achromatic breaks in afterglow light curves (2007)
Curran, P. A., Van Der Horst, A. J., Starling, R. L. C., Castro-Tirado, A. J., Fynbo, J. P. U., ...
Gamma-ray burst afterglow observations in the Swift era have a perceived lack of achromatic jet breaks compared to the BeppoSAX era. We present our multi-wavelength analysis of GRB 060206 as an...
The prompt to late-time multiwavelength analysis of GRB 060210 (2007)
Curran, P. A., Van Der Horst, A. J., Beardmore, A. P., Page, K. L., Rol, E., Melandri, A., ...
We present our analysis of the multiwavelength photometric & spectroscopic observations of GRB 060210 and discuss the results in the overall context of current GRB models. All available optical data...
GRB 060206 and the quandary of achromatic breaks in afterglow light curves. (2007)
Curran, P., Van Der Horst, A.J., Starling, R.L., Castro-Tirado, A.J., Fynbo, J.P.U., ...
3D studies of neutral and ionised gas and stars in Seyfert and inactive galaxies (2007)
Mundell, C. G., Dumas, G., Schinnerer, E., Nagar, N., Haan, S., Wilcots, E., ...
We are conducting the first systematic 3D spectroscopic imaging survey to quantify the properties of the atomic gas (HI) in a distance-limited sample of 28 Seyfert galaxies and a sample of 28...
Gas dynamics in AGN galaxies: first results of the HI-NUGA survey (2007)
Haan, S., Schinnerer, E., Mundell, C. G., García-Burillo, S., Combes, F.
Not Available
A Review of Early-Time Optical Follow-ups with 2-m Robotic Telescopes (2006)
Gomboc, A., Guidorzi, C., Mundell, C. G., Melandri, A., Monfardini, A., Bersier, D., ...
We summarise recent deep, rapid GRB follow-up observations using the RoboNet-1.0 network which comprises three fully-robotic 2-m telescopes, the Liverpool Telescope and the Faulkes Telescopes North...
Guidorzi, C., Gomboc, A., Kobayashi, S., Mundell, C. G., Rol, E., Bode, M. F., ...
We report a multi-wavelength analysis of the prompt emission and early afterglow of GRB051111 and discuss its properties in the context of current fireball models. The detection of GRB051111 by the...
The Remarkable Afterglow of GRB 061007: Implications for Optical Flashes and GRB Fireballs (2006)
Mundell, C. G., Melandri, A., Guidorzi, C., Kobayashi, S., Steele, I. A., Malesani, D., ...
We present a multiwavelength analysis of Swift GRB 061007. The 2-m robotic Faulkes Telescope South (FTS) began observing 137 s after the onset of the gamma-ray emission, when the optical counterpart...
3D Studies of Neutral and Ionised Gas and Stars in Seyfert and Inactive Galaxies (2006)
Emsellem, E., Wilson, A. S., Wilcots, E., Haan, S., Nagar, N., Schinnerer, E., ...
Abstract: We are conducting the first systematic 3D spectroscopic imaging survey to quantify the properties of the atomic gas (HI) in a distance-limited sample of 28 Seyfert galaxies and a sample of...
3D Studies of Neutral and Ionised Gas and Stars in Seyfert and Inactive Galaxies (2006)
Mundell, C. G., Dumas, G., Schinnerer, E., Nagar, N., Haan, S., Wilcots, E., ...
We are conducting the first systematic 3D spectroscopic imaging survey to quantify the properties of the atomic gas (HI) in a distance-limited sample of 28 Seyfert galaxies and a sample of 28...
Anatomy of A Dark Burst - The Afterglow of GRB 060108 (2006)
Oates, S. R., Mundell, C. G., Piranomonte, S., Page, K. L., De Pasquale, M., Monfardini, A., ...
We report the first detection of an optical afterglow of a GRB (060108) that would have been classified as 'dark' in the absence of deep, rapid ground-based optical imaging with the 2-m robotic...
Multi-wavelength afterglow observations of the high redshift GRB 050730 (2006)
Pandey, S. B., Castro-Tirado, A. J., McBreen, S., Perez-Ramirez, M. D., Bremer, M., Guerrero, M. A., ...
GRB 050730 is a long duration high-redshift burst (z=3.967) discovered by Swift. The afterglow shows variability and is well monitored over a wide wavelength range. We present comprehensive temporal...
The slope of the GRB Variability/Peak Luminosity Correlation (2006)
Guidorzi, C., Frontera, F., Montanari, E., Rossi, F., Amati, L., Gomboc, A., ...
From a sample of 32 GRBs with known redshift (Guidorzi et al. 2005) and then a sample of 551 BATSE GRBs with derived pseudo-redshift (Guidorzi 2005), the time variability/peak luminosity correlation...
Monfardini, A., Kobayashi, S., Guidorzi, C., Carter, D., Mundell, C. G., Bersier, D. F., ...
The 2-m robotic Liverpool Telescope (LT) reacted promptly to the high-redshift (z=4.048) gamma-ray burst GRB 060206. The afterglow was identified automatically and multicolor r'i'z' imaging was...
The variable X-ray light curve of GRB 050713A: the case of refreshed shocks (2006)
Guetta, D., Fiore, F., D'Elia, V., Perna, R., Antonelli, L. A., Piranomonte, S., ...
We present a detailed study of the spectral and temporal properties of the X-ray and optical emission of GRB050713a up to 0.5 day after the main GRB event. The X-ray light curve exhibits large...
The Host Galaxy-AGN Connection - Is Neutral Gas the Key? (2006)
Supermassive black holes are thought to be ubiquitous in bulge-dominated galaxies and the standard model of Active Galactic Nuclei (AGN) invokes the release of gravitational energy due to accretion...
Multi-wavelength afterglow observations of the high redshift GRB 050730 (2006)
Pandey, S. B., Castro-Tirado, A. J., McBreen, S., Pérez-Ramírez, M. D., Bremer, M., Guerrero, M. A., ...
The Automatic Real-Time GRB Pipeline of the 2-m Liverpool Telescope (2005)
Guidorzi, C., Monfardini, A., Gomboc, A., Mottram, C. J., Mundell, C. G., Steele, I. A., ...
The 2-m Liverpool Telescope (LT), owned by Liverpool John Moores University, is located in La Palma (Canary Islands) and operates in fully robotic mode. In 2005, the LT began conducting an automatic...
Guidorzi, C., Monfardini, A., Gomboc, A., Mundell, C. G., Steele, I. A., Carter, D., ...
The 2-m robotic Liverpool Telescope reacted promptly to the gamma-ray burst GRB 050502a discovered by INTEGRAL and started observing 3 min after the onset of the GRB. The automatic identification of...
The GRB Variability/Peak Luminosity Correlation: new results (2005)
Guidorzi, C., Frontera, F., Montanari, E., Rossi, F., Amati, L., Gomboc, A., ...
We report test results of the correlation between time variability and peak luminosity of Gamma-Ray Bursts (GRBs), using a larger sample (32) of GRBs with known redshift than that available to...
Gomboc, A., Mundell, C. G., Guidorzi, C., Monfardini, A., Mottram, C. J., Priddey, R., ...
We present the first optical observations of a Gamma Ray Burst (GRB) afterglow using the 2-m robotic Liverpool Telescope (LT), which is owned and operated by Liverpool John Moores University and...
The Liverpool Telescope Automatic Pipeline for Real-time GRB Afterglow Detection (2005)
Gomboc, A., Monfardini, A., Guidorzi, C., Mundell, C. G., Mottram, C. J., Fraser, S. N., ...
The 2-m robotic Liverpool Telescope (LT) is ideally suited to the rapid follow-up of unpredictable and transient events such as GRBs. Our GRB follow-up strategy is designed to identify optical/IR...
Kinematics of Ionised Gas in the Barred Seyfert Galaxy NGC 4151 (2005)
Asif, M. W., Mundell, C. G., Pedlar, A.
We have determined the structure and kinematics of ionised gas in the weak oval bar of the archetypal Seyfert 1 galaxy, NGC 4151, using the TAURUS Fabry-Perot interferometer to simultaneously map the...
Rapid GRB Follow-up with the 2-m Robotic Liverpool Telescope (2004)
Gomboc, A., Bode, M. F., Carter, D., Guidorzi, C., Monfardini, A., Mundell, C. G., ...
We present the capabilities of the 2-m robotic Liverpool Telescope (LT), owned and operated by Liverpool John Moores University and situated at ORM, La Palma. Robotic control and scheduling of the LT...
The Discovery of New Galaxy Members in the NGC 5044 and NGC 1052 Groups (2004)
McKay, N. P. F., Mundell, C. G., Brough, S., Forbes, D. A., Barnes, D. G., James, P. A., ...
We present the results of neutral hydrogen (HI) observations of the NGC 5044 and NGC 1052 groups, as part of a GEMS (Group Evolution Multiwavelength Study) investigation into the formation and...
Gomboc, A., Bode, M. F., Carter, D., Mundell, C. G., Newsam, A. M., Smith, R. J., ...
The Liverpool Telescope, situated at Roque de los Muchachos Observatory, La Palma, Canaries, is the first 2-m, fully instrumented robotic telescope. It recently began observations. Among Liverpool...
GRB optical and IR rapid follow-up with the 2 m Liverpool Robotic Telescope (2003)
Gomboc, A., Bode, M. F., Carter, D., Mundell, C. G., Newsam, A. M., Smith, R. J., ...
The Liverpool Telescope, owned and operated by Liverpool John Moores University and situated at Roque de los Muchachos, La Palma, is the first 2-m, fully instrumented robotic telescope. We plan to...
Neutral Hydrogen in Galaxy Groups (2002)
McKay, N. P. F., Mundell, C. G., Brough, S., Forbes, D. A., Barnes, D. G.
We present preliminary results from a study of the neutral hydrogen (HI) properties of an X-ray selected sample of nearby loose galaxy groups. This forms part of a multi-wavelength investigation...
Mundell, C. G., Wrobel, J. M., Pedlar, A., Gallimore, J. F.
Sensitive high angular and linear resolution radio images of the 240-pc radio jet in NGC4151, imaged at linear resolutions of 0.3 to 2.6 pc using the VLBA and phased VLA at 21 cm, are presented and...
Violence in the Hearts of Galaxies - Aberration or Adolescence? (2002)
Violent activity in the nuclei of galaxies has long been considered a curiosity in its own right; manifestations of this phenomenon include distant quasars in the early Universe and comparatively...
Taylor, G. B., Peck, A. B., Henkel, C., Falcke, H., Mundell, C. G., O'Dea, C. P., ...
We report on the discovery of HI in absorption toward the gigamaser galaxy TXS2226-184 using the VLA. The absorption appears to consist of two components -- one with a width of 125 km/s, and one...
Chandra Imaging of the X-ray Core of the Virgo Cluster (2002)
Young, A. J., Wilson, A. S., Mundell, C. G.
We report sub-arcsecond X-ray imaging spectroscopy of M87 and the core of the Virgo cluster with the Chandra X-ray Observatory. The X-ray morphology shows structure on arcsecond (~100 pc) to ten...
Gigahertz-Peaked Spectrum Radio Sources in Nearby Galaxies (2002)
Nagar, N. M., Wilson, A. S., Falcke, H., Ulvestad, J. S., Mundell, C. G.
There is now strong evidence that many low-luminosity AGNs (LLAGNs) contain accreting massive black holes and that the nuclear radio emission is dominated by parsec-scale jets launched by these black...
Taylor, G. B., Peck, A. B., Henkel, C., Falcke, H., Mundell, C. G., O'Dea, C. P., ...
We report on the discovery of H I in absorption toward the gigamaser galaxy TXS 2226-184 using the Very Large Array. The absorption appears to consist of two components one with a width of 125 km...
Gigahertz-peaked spectrum radio sources in nearby galaxies (2002)
Nagar, N. M., Wilson, A. S., Falcke, H., Ulvestad, J. S., Mundell, C. G.
Neutral hydrogen in galaxy groups (2002)
Forbes, Duncan A., Mundell, C. G., Brough, Sarah, Barnes, David G.
We present preliminary results from a study of the neutral hydrogen (Hi) properties of an X-ray selected sample of nearby loose galaxy groups. This forms part of a multi-wavelength investigation...
Neutral hydrogen in galaxy groups (2002)
Forbes, Duncan A., Mundell, C. G., Brough, Sarah, Barnes, David G.
We present preliminary results from a study of the neutral hydrogen (Hi) properties of an X-ray selected sample of nearby loose galaxy groups. This forms part of a multi-wavelength investigation...
Nuclear gas dynamics in Arp 220 - sub-kiloparsec scale atomic hydrogen disks (2001)
Mundell, C. G., Ferruit, P, Pedlar, A
We present new, high angular resolution (~0.22") MERLIN observations of neutral hydrogen (HI) absorption and 21-cm radio continuum emission across the central ~900 parsecs of the ultraluminous...
The Nature of Flat-Spectrum Nuclear Radio Emission in Seyfert Galaxies (2000)
Mundell, C. G., Wilson, A. S., Ulvestad, J. S., Roy, A. L.
Parsec-scale VLBA imaging of five Seyfert galaxies with flat-spectrum radio nuclei was conducted to determine whether the flat spectrum represents thermal emission from the accretion disk/obscuring...
Subparsec-scale HI in the nucleus of NGC 4151 (2000)
Mundell, C. G., Wrobel, J. M., Pedlar, A., Gallimore, J. F.
We present sensitive, high-resolution 21-cm VLBA+VLA observations of the radio jet and nuclear HI absorption in NGC 4151. The 25-mas (1.6-pc) resolution continuum image reveals a highly collimated...
The Gaseous Environment of Seyfert Galaxies (2000)
The VLA has been used to image HI in a heterogeneous sample of nine Seyferts as part of a continuing investigation of the role of galactic host gas in the triggering and fuelling of nuclear activity....
Parsec-Scale Jets and Tori in Seyfert Galaxies (2000)
Roy, A. L., Wrobel, J. M., Wilson, A. S., Ulvestad, J. S., Norris, R. P., Mundell, C. G., ...
What causes the dichotomy between very powerful and very weak radio emission from AGNs? Perhaps the engines are the same but the jets get disrupted by dense ISM in radio-quiet objects, or else the...
Free-Free Absorption on Parsec Scales in Seyfert Galaxies (1999)
Roy, A. L., Ulvestad, J. S., Wilson, A. S., Colbert, E. J. M., Mundell, C. G., Wrobel, J. M., ...
Seyfert galaxies come in two main types (types 1 and 2) and the difference is probably due to obscuration of the nucleus by a torus of dense molecular material. The inner edge of the torus is...
Parsec-Scale Images of Flat-Spectrum Radio Sources in Seyfert Galaxies (1999)
Mundell, C. G., Wilson, A. S., Ulvestad, J. S., Roy, A. L.
We present high angular resolution (~2 mas) radio continuum observations of five Seyfert galaxies with flat-spectrum radio nuclei, using the VLBA at 8.4 GHz. The goal of the project is to test...
We present sensitive, high resolution observations of neutral hydrogen (HI) in the unusually gas-rich, oval distortion of the Seyfert galaxy NGC4151. The gas dynamics of the oval are found to be...
Gas Dynamics in the Barred Seyfert Galaxy NGC4151 - II. High Resolution HI Study (1998)
Mundell, C. G., Pedlar, A., Shone, D. L., Robinson, A.
We present sensitive, high angular resolution (6" x 5") 21-cm observations of the neutral hydrogen in the nearby barred Seyfert galaxy, NGC4151. These HI observations, obtained using the VLA in...
Localised Neutral Hydrogen Absorption Towards the Radio Jet of Markarian 6 (1997)
Gallimore, J. F., Holloway, A. J., Pedlar, A., Mundell, C. G.
We present 0.15 arcsec (56 pc) resolution MERLIN observations of neutral hydrogen (HI) 21 cm absorption detected towards the arcsecond-scale radio jet of the Seyfert 1.5 galaxy Markarian 6....
Evidence for an outflow from the Seyfert galaxy NGC 4051 (1996)
Christopoulou, P. E., Holloway, A. J., Steffen, W., Mundell, C. G., Thean, A. H. C., Goudis, C. D., ...
New observations using narrow band imaging, long-slit spectroscopy and MERLIN observations of the nuclear region of the Seyfert galaxy NGC~4051 have been made. An edge brightened, triangular region...