136 citations · 1.7k across the 34 of their papers we have counts for
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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…
Exploring the substellar temperature regime down to ~550K
Ben Burningham, D. J. Pinfield, S. K. Leggett +15
We report the discovery of three very late T dwarfs in the UKIRT Infrared Deep Sky Survey (UKIDSS) Third Data Release: ULAS J101721.40+011817.9 (ULAS1017), ULAS J123828.51+095351.3…
Eight new T4.5-T7.5 dwarfs discovered in the UKIDSS Large Area Survey Data Release 1
N. Lodieu, D. J. Pinfield, S. K. Leggett +4
We present eight new T4.5-T7.5 dwarfs identified in the UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) Data Release 1 (DR1). In addition we have recovered the T4.5…
Spectroscopic monitoring of the BL Lac object AO 0235+164
C. M. Raiteri, M. Villata, A. Capetti +3
We performed optical spectroscopic monitoring of the BL Lac object AO 0235+164 (z=0.94) with the VLT and TNG telescopes from Aug. 2003 to Dec. 2004, during an extended WEBT campaig…
Pulsation in the atmosphere of the roAp star HD 24712. I. Spectroscopic observations and radial velocity measurements
T. Ryabchikova, M. Sachkov, W. W. Weiss +10
We have investigated the structure of the pulsating atmosphere of one of the best studied rapidly oscillating Ap stars, HD 24712. For this purpose we analyzed spectra collected dur…
Spectroscopy of roAp star pulsation: HD24712
M. Sachkov, T. Ryabchikova, S. Bagnulo +10
We present results of the radial velocity (RV) analysis of spectroscopic time-series observations of the roAp star HD24712 (HR1217) which were carried out simultaneously with the C…
Crossing into the substellar regime in Praesepe
R. J. Chappelle, D. J. Pinfield, I. A. Steele +2
We present the results of a deep optical 2.6 square degree survey with near infrared follow-up measurements of the intermediate-aged Praesepe open cluster. The survey is complete t…
Late-epoch optical and near-infrared observations of the GRB000911 afterglow and its host galaxy
N. Masetti, E. Palazzi, E. Pian +28
We present the results of an optical and near-infrared (NIR) monitoring campaign of the counterpart of Gamma-Ray Burst (GRB) 000911, located at redshift z=1.06, from 5 days to more…
On the potassium-rotation connection in late-type Alpha Persei stars
Eduardo L. Martin, Antonio Magazzu, Ramon J. Garcia Lopez +2
We present measurements of the \ion{K}{i} line from spectra of 19 late-type members of the Persei cluster obtained with the Intermediate Dispersion Spectrograph at the I…
The pre-main sequence spectroscopic binary UZ Tau East: improved orbital parameters and accretion phase dependence
Eduardo L. Martín, Antonio Magazzù, Xavier Delfosse +1
We present radial-velocity measurements obtained using high- and intermediate-resolution spectroscopic observations of the classical T Tauri star UZ Tau East obtained from 1994 to…
Four Brown Dwarfs in the Taurus Star-Forming Region
E. L. Martin, C. Dougados, E. Magnier +4
We have identified four brown dwarfs in the Taurus star-forming region. They were first selected from and CCD photometry of 2.29 square degrees obtained at the Canada-Franc…
GRB010222: afterglow emission from a rapidly decelerating shock
N. Masetti
The GRB010222 optical and near-infrared (NIR) afterglow was monitored at the TNG and other Italian telescopes starting ~1 day after the high-energy prompt event. The optical BVR li…
The extraordinarily bright optical afterglow of GRB 991208 and its host galaxy
A. J. Castro-Tirado, V. V. Sokolov, J. Gorosabel +50
Observations of the extraordinarily bright optical afterglow (OA) of GRB 991208 started 2.1 d after the event. The flux decay constant of the OA in the R-band is -2.30 +/- 0.07 up…
The very red afterglow of GRB 000418 - further evidence for dust extinction in a GRB host galaxy
S. Klose, B. Stecklum, N. Masetti +36
We report near-infrared and optical follow-up observations of the afterglow of the Gamma-Ray Burst 000418 starting 2.5 days after the occurrence of the burst and extending over nea…
Spiral shocks in the accretion disc of IP Peg during outburst maximum
E. T. Harlaftis, D. Steeghs, K. Horne +2
In response to our recent discovery of spiral arms in the accretion disc of IP Peg during rise to outburst, we have obtained time-resolved spectrophotometry of IP Peg during outbur…
Radio emission from RASS sources south of Taurus-Auriga
A. Magazzu, G. Umana, E. L. Martin
We present a 8.4 GHz VLA survey of 50 optical counterparts to 46 ROSAT All-Sky survey (RASS) X-ray sources south of the Taurus-Auriga star-forming region. This survey detected 3 so…
Brown Dwarfs in the Pleiades Cluster. III. A deep IZ survey
M. R. Zapatero Osorio, R. Rebolo, E. L. Martin +5
We present the results of a deep CCD-based IZ photometric survey of a ~1 sq. deg area in the central region of the Pleiades Galactic open cluster. The magnitude coverage of our sur…
A brown dwarf candidate in the Praesepe Open Cluster
A. Magazzu, R. Rebolo, M. R. Zapatero Osorio +2
We present optical and infrared observations of RPr1, a faint (I = 21.01) and very red object (I - K = 4.57) discovered in a deep CCD survey, covering an area of 800 square arcmin…
New Brown Dwarfs in the Pleiades Cluster
M. R. Zapatero Osorio, R. Rebolo, E. L. Martin +5
We present intermediate and low resolution optical spectroscopy (650-915 nm) of seven faint, very red objects (20 > I >= 17.8, I-Z >= 0.5) discovered in a CCD-based IZ survey cover…
Search for young low-mass stars in a ROSAT selected sample south of the Taurus-Auriga molecular clouds
A. Magazzu, E. L. Martin, M. F. Sterzik +3
We present results of intermediate resolution spectroscopy of 131 optical counterparts to 115 ROSAT All-Sky Survey X-ray sources south of the Taurus-Auriga dark cloud complex. Thes…
Theoretical LTE & NLTE curves of growth for Li I lines in G-M dwarfs and subgiants
Ya. V. Pavlenko, A. Magazzu
Detailed simultaneous radiative transfer-statistical equilibrium calculations have been performed for lithium in atmospheres of solar metallicity G-M dwarfs and subgiants. Model at…
Lithium and the Nature of Brown Dwarf Candidates
R. Rebolo, A. Magazzu, E. L. Martin
This paper discusses the ability of Li to confirm the substellar nature of a brown dwarf candidate. Theoretical computations using different interior models agree that brown dwarfs…