704 citations · 5.6k across the 98 of their papers we have counts for
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A multi-wavelength survey of AGN in the XMM-LSS field: I. Quasar selection via the KX technique
Th. Nakos, J. P. Willis, S. Andreon +16
AIMS: We present a sample of candidate quasars selected using the KX-technique. The data cover 0.68 deg^2 of the X-ray Multi-Mirror (XMM) Large-Scale Structure (LSS) survey area wh…
Stellar disruption by a supermassive black hole: is the light curve really proportional to ?
G. Lodato, A. R. King, J. E. Pringle
In this paper we revisit the arguments for the basis of the time evolution of the flares expected to arise when a star is disrupted by a supermassive black hole. We present a simpl…
Swift Observations of Shock Evolution in RS Ophiuchi
M. F. Bode, J. P. Osborne, K. L. Page +11
Our \textit{Swift} observations of RS Oph form an unprecedented X-ray dataset to undertake investigations of both the central source and the interaction of the outburst ejecta with…
Robust photometric redshift determinations of gamma-ray burst afterglows at z > 2
P. A. Curran, R. A. M. J. Wijers, M. H. M. Heemskerk +3
Theory suggests that about 10% of Swift-detected gamma-ray bursts (GRBs) will originate at redshifts greater than 5 yet a number of high redshift candidates may be left unconfirmed…
X-Ray Afterglows
Paul O'Brien, Richard Willingale
We summarise the X-ray temporal and spectral variability properties of GRBs as observed using the Swift satellite. Despite much individual complexity, the flux and spectral variabi…
Fifteen new T dwarfs discovered in the UKIDSS Large Area Survey
D. J. Pinfield, B. Burningham, M. Tamura +32
We present the discovery of fifteen new T2.5-T7.5 dwarfs (with estimated distances between ~24-93pc, identified in the first three main data releases of the UKIRT Infrared Deep Sky…
L dwarfs in the Hyades
E. Hogan, R. F. Jameson, S. L. Casewell +2
We present the results of a proper motion survey of the Hyades to search for brown dwarfs, based on UKIDSS and 2MASS data. This survey covers ~275 square degrees to depth of K~15 m…
The defining characteristics of Intermediate Polars - the case of three candidate systems
Gavin Ramsay, Peter J. Wheatley, A. J. Norton +2
Intermediate Polars (IPs) are a group of cataclysmic variables (CVs) which are thought to contain white dwarfs which have a magnetic field strength in the range ~0.1-10MG. A signif…
New Hubble Space Telescope imaging of the counterparts to six ultraluminous X-ray sources
T. P. Roberts, A. J. Levan, M. R. Goad
We report the results of new Hubble Space Telescope imaging of the positions of six ultraluminous X-ray sources (ULXs). Using images in three ACS filters we detect good candidate c…
The Intrinsic Fraction of Broad Absorption Line Quasars
Christian Knigge, Simone Scaringi, Michael R. Goad +1
We carefully reconsider the problem of classifying broad absorption line quasars (BALQSOs) and derive a new, unbiased estimate of the intrinsic BALQSO fraction from the SDSS DR3 QS…
X-ray absorption in distant type II QSOs
M. Krumpe, G. Lamer, A. Corral +7
We present the results of the X-ray spectral analysis of an XMM-Newton-selected type II QSO sample with z>0.5 and 0.5-10 keV flux of 0.3-33 x 10^{-14} erg/s/cm^2. The distribution…
GRB 070714B - Discovery of the Highest Spectroscopically Confirmed Short Burst Redshift
J. F. Graham, A. S. Fruchter, A. J. Levan +5
Gemini Nod & Shuffle spectroscopy on the host of the short GRB 070714B shows a single emission line at 7167 angstroms which, based on a grizJHK photometric redshift, we conclude is…
Short gamma-ray bursts from SGR giant flares and neutron star mergers: two populations are better than one
Robert Chapman, Robert S. Priddey, Nial R. Tanvir
There is increasing evidence of a local population of short duration Gamma-ray Bursts (sGRB), but it remains to be seen whether this is a separate population to higher redshift bur…
Modelling the dynamical evolution of the Bootes dwarf spheroidal galaxy
M. Fellhauer, M. I. Wilkinson, N. W. Evans +5
We investigate a wide range of possible evolutionary histories for the recently discovered Bootes dwarf spheroidal galaxy, a Milky Way satellite. By means of N-body simulations we…
The hidden X-ray breaks in afterglow light curves
P. A. Curran, A. J. van der Horst, R. A. M. J. Wijers +1
Gamma-Ray Burst (GRB) afterglow observations in the Swift era have a perceived lack of achromatic jet breaks compared to the BeppoSAX, or pre-Swift era. Specifically, relatively fe…
The potential for Earth-mass planet formation around brown dwarfs
Matthew J. Payne, Giuseppe Lodato
Recent observations point to the presence of structured dust grains in the discs surrounding young brown dwarfs, thus implying that the first stages of planet formation take place…
How common are long Gamma-Ray Bursts in the Local Universe?
Robert Chapman, Nial R. Tanvir, Robert S. Priddey +1
The two closest Gamma-Ray Bursts so far detected (GRBs 980425 & 060218) were both under-luminous, spectrally soft, long duration bursts with smooth, single-peaked light curves. Onl…
The First Survey of X-ray Flares from Gamma Ray Bursts Observed by Swift: Spectral Properties and Energetics
A. D. Falcone, D. Morris, J. Racusin +12
Observations of gamma ray bursts (GRBs) with Swift produced the initially surprising result that many bursts have large X-ray flares superimposed on the underlying afterglow. The f…
The effect of stellar-mass black holes on the structural evolution of massive star clusters
A. D. Mackey, M. I. Wilkinson, M. B. Davies +1
We present the results of realistic N-body modelling of massive star clusters in the Magellanic Clouds, aimed at investigating a dynamical origin for the radius-age trend observed…
The Chandra View of Galaxy Mergers
N. J. Brassington, T. J. Ponman, A. M. Read
From a Chandra survey of nine interacting galaxy systems the evolution of X-ray emission during the merger process has been investigated. It is found that the X-ray luminosity peak…
The prompt to late-time multiwavelength analysis of GRB 060210
P. A. Curran, A. J. van der Horst, A. P. Beardmore +19
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 avai…
ACS photometry of newly-discovered globular clusters in the outer halo of M31
A. D. Mackey, A. Huxor, A. M. N. Ferguson +6
We report the first results from deep ACS imaging of ten classical globular clusters in the far outer regions (15 < R_p < 100 kpc) of M31. Eight of the clusters, including two of t…
The circumburst environment of a FRED GRB: study of the prompt emission and X-ray/optical afterglow of GRB 051111
C. Guidorzi, A. Gomboc, S. Kobayashi +14
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…
Search for Giant Planets around White Dwarfs with HST, Spitzer, and VLT
S. Friedrich, H. Zinnecker, S. Correia +3
For the last three years we have performed a survey for young (<3 Gyrs) giant planets around nearby white dwarfs with HST, Spitzer, and VLT. Direct HST/NICMOS imaging of the seven…