Tsapras, Y., Street, R., Horne, K., Snodgrass, C., Dominik, M., Allan, A., ...
RoboNet-II uses a global network of robotic telescopes to perform follow-up observations of microlensing events in the Galactic Bulge. The current network consists of three 2m telescopes located in...
A new search for variable stars in the globular cluster NGC 6366 (2008)
Ferro, A. Arellano, Giridhar, Sunetra, Lopez, V. Rojas, Figuera, R., Bramich, D. M., Rosenzweig, P.
New CCD photometry of NGC 6366 has lead to the discovery of some variable stars. Two possible Anomalous Cepheids (or Pop II Cepheids), three long period variables, one SX Phe and one eclipsing binary...
OGLE-2005-BLG-071Lb, the Most Massive M-Dwarf Planetary Companion? (2008)
Dong, Subo, Gould, Andrew, Udalski, Andrzej, Anderson, Jay, Christie, G. W., Gaudi, B. S., ...
We combine all available information to constrain the nature of OGLE-2005-BLG-071Lb, the second planet discovered by microlensing and the first in a high-magnification event. These include...
Arellano Ferro, A, Rojas López, V, Giridhar, S, Bramich, D. M
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A New Algorithm For Difference Image Analysis (2008)
In the context of difference image analysis (DIA), we present a new method for determining the convolution kernel matching a pair of images of the same field. Unlike the standard DIA technique which...
Light and Motion in SDSS Stripe 82: The Catalogues (2008)
Bramich, D. M., Vidrih, S., Wyrzykowski, L., Munn, J. A., Lin, H., Evans, N. W., ...
We present a new public archive of light-motion curves in Sloan Digital Sky Survey (SDSS) Stripe 82, covering 99 deg in right ascension from RA = 20.7 h to 3.3 h and spanning 2.52 deg in declination...
2MASS J01542930+0053266 : A New Eclipsing M-dwarf Binary System (2008)
Becker, A. C., Agol, E., Silvestri, N. M., Bochanski, J. J., Laws, C., West, A. A., ...
We report on 2MASS J01542930+0053266, a faint eclipsing system composed of two M dwarfs. The variability of this system was originally discovered during a pilot study of the 2MASS Calibration Point...
Ferro, A. Arellano, Lopez, V. Rojas, Giridhar, Sunetra, Bramich, D. M.
We report the results of CCD V and r photometry of the globular cluster NGC 5466. The difference image analysis technique adopted in this work has resulted in accurate time series photometry even in...
New UltraCool and Halo White Dwarf Candidates in SDSS Stripe 82 (2007)
Vidrih, S., Bramich, D. M., Hewett, P. C., Evans, N. W., Gilmore, G., Hodgkin, S., ...
A 2.5 x 100 degree region along the celestial equator (Stripe 82) has been imaged repeatedly from 1998 to 2005 by the Sloan Digital Sky Survey. A new catalogue of ~4 million light-motion curves,...
Dominik, M., Rattenbury, N. J., Allan, A., Mao, S., Bramich, D. M., Burgdorf, M. J., ...
(abridged) The discovery of OGLE 2005-BLG-390Lb, the first cool rocky/icy exoplanet, impressively demonstrated the sensitivity of the microlensing technique to extra-solar planets below 10 M_earth. A...
Irwin, Jonathan, Aigrain, Suzanne, Hodgkin, Simon, Stassun, Keivan G., Hebb, Leslie, Irwin, Mike, ...
We report the discovery of a low-mass (0.26 +/- 0.02, 0.15 +/- 0.01 Msol) pre-main-sequence eclipsing binary with a 5.3 day orbital period. JW 380 was detected as part of a high-cadence time-resolved...
The Monitor project: Rotation of low-mass stars in the open cluster NGC 2516 (2007)
Irwin, Jonathan, Hodgkin, Simon, Aigrain, Suzanne, Hebb, Leslie, Bouvier, Jerome, Clarke, Cathie, ...
We report on the results of an i-band time-series photometric survey of NGC 2516 using the CTIO 4m Blanco telescope and 8k Mosaic-II detector, achieving better than 1% photometric precision per data...
The Hercules-Aquila Cloud (2007)
Belokurov, V., Evans, N. W., Bell, E. F., Irwin, M. J., Hewett, P. C., Koposov, S., ...
We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The Cloud is centered at a Galactic longitude of about 40 degrees and extends...
Discovery of an Unusual Dwarf Galaxy in the Outskirts of the Milky Way (2007)
Irwin, M. J., Belokurov, V., Evans, N. W., Ryan-Weber, E. V., Koposov, S., ...
In this Letter, we announce the discovery of a new dwarf galaxy, Leo T, in the Local Group. It was found as a stellar overdensity in the Sloan Digital Sky Survey Data Release 5 (SDSS DR5). The...
The fifth data release of the sloan digital sky survey (2007)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
Discovery of an unusual dwarf galaxy in the outskirts of the Milky Way (2007)
Irwin, M. J., Belokurov, V., Evans, N. W., Ryan-Weber, E. V., Koposov, S., ...
We announce the discovery of a new dwarf galaxy, Leo T, in the Local Group. It was found as a stellar overdensity in the Sloan Digital Sky Survey Data Release 5 (SDSS DR5). The color-magnitude...
Cats and dogs, hair and a hero: a quintet of New Milky Way companions (2007)
Belokurov, V., Zucker, D. B., Evans, N. W., Kleyna, J. T., Koposov, S., Hodgkin, S. T., ...
We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed up with either the Subaru or the Isaac Newton Telescopes. They...
An Orphan in the ``Field of Streams'' (2007)
Belokurov, V., Evans, N. W., Irwin, M. J., Lynden-Bell, D., Yanny, B., Vidrih, S., ...
We use Sloan Digital Sky Survey Data Release 5 photometry and spectroscopy to study a tidal stream that extends over ~50° in the north Galactic cap. From the analysis of the path of the stream and...
The Hercules-Aquila cloud (2007)
Belokurov, V., Evans, N. W., Bell, E. F., Irwin, M. J., Hewett, P. C., Koposov, S., ...
We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The cloud is centered at a Galactic longitude of l~40deg and extends above...
The Fifth Data Release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
Is Ursa Major II the Progenitor of the Orphan Stream? (2006)
Fellhauer, M., Evans, N. W., Belokurov, V., Zucker, D. B., Yanny, B., Wilkinson, M. I., ...
Prominent in the `Field of Streams' -- the Sloan Digital Sky Survey map of substructure in the Galactic halo -- is an `Orphan Stream' without obvious progenitor. In this numerical study, we show a...
Upper limits on the hot Jupiter fraction in the field of NGC 7789 (2006)
We describe a method of estimating the abundance of short-period extra-solar planets based on the results of a photometric survey for planetary transits. We apply the method to a 21-night survey with...
A. Arellano Ferro, D. M. Bramich, S. Giridhar, V. Rojas López
Physical parameters of rr lyrae stars in the globular cluster ngc 5466: the oosterhoff dichotomy
Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions (2006)
Belokurov, V., Zucker, D. B., Evans, N. W., Kleyna, J. T., Koposov, S., Hodgkin, S. T., ...
We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed-up with either the Subaru or the Isaac Newton Telescopes. They...
CCD Photometry of the globular cluster M2. RR Lyrae physical parameters and new variables (2006)
Lazaro, C., Ferro, A. Arellano, Arevalo, M. J., Bramich, D. M., Giridhar, S., Poretti, E.
We report the results of CCD V and R photometry of the RR Lyrae stars in M2. The periodicities of most variables are revised and new ephemerides are calculated. Light curve decomposition of the RR...
A Curious New Milky Way Satellite in Ursa Major (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Kleyna, J. T., Irwin, M. J., Wilkinson, M. I., ...
In this Letter, we study a localized stellar overdensity in the constellation of Ursa Major, first identified in Sloan Digital Sky Survey (SDSS) data and subsequently followed up with Subaru imaging....
An Orphan in the "Field of Streams" (2006)
Belokurov, V., Evans, N. W., Irwin, M. J., Lynden-Bell, D., Yanny, B., Vidrih, S., ...
We use Sloan Digital Sky Survey Data Release 5 photometry and spectroscopy to study a tidal stream that extends over 50 degrees in the North Galactic Cap. From the analysis of the path of the stream...
The Field of Streams: Sagittarius and its Siblings (2006)
Belokurov, V., Zucker, D. B., Evans, N. W., Gilmore, G., Vidrih, S., Bramich, D. M., ...
We use Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5) u,g,r,i,z photometry to study Milky Way halo substructure in the area around the North Galactic Cap. A simple color cut (g-r < 0.4) reveals...
The Origin of the Bifurcation in the Sagittarius Stream (2006)
Fellhauer, M., Belokurov, V., Evans, N. W., Wilkinson, M. I., Zucker, D. B., Gilmore, G., ...
The latest Sloan Digital Sky Survey data reveal a prominent bifurcation in the distribution of debris of the Sagittarius dwarf spheroidal (Sgr) beginning at a right ascension of roughly 190 degrees....
A New Milky Way Dwarf Satellite in Canes Venatici (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Wilkinson, M. I., Irwin, M. J., Sivarani, T., ...
In this Letter, we announce the discovery of a new dwarf satellite of the Milky Way, located in the constellation Canes Venatici. It was found as a stellar overdensity in the North Galactic Cap using...
A Faint New Milky Way Satellite in Bootes (2006)
Belokurov, V., Zucker, D. B., Evans, N. W., Wilkinson, M. I., Irwin, M. J., Hodgkin, S., ...
In this Letter, we announce the discovery of a new satellite of the Milky Way in the constellation of Bootes at a distance of 60 kpc. It was found in a systematic search for stellar overdensities in...
Microlens OGLE-2005-BLG-169 Implies Cool Neptune-Like Planets are Common (2006)
Gould, A., Udalski, A., An, D., Bennett, D. P., Dong, S., ...
We detect a Neptune mass-ratio (q~8e-5) planetary companion to the lens star in the extremely high-magnification (A~800) microlensing event OGLE-2005-BLG-169. If the parent is a main-sequence star,...
CCD Photometry of the RR LYRAE Stars in NGC 4147 (2006)
A. Arellano Ferro, M. J. Arévalo, C. Lázaro, M. Rey, D. M. Bramich, S. Giridhar
CCD Photometry of the RR LYRAE Stars in NGC 4147
CCD Photometry of the globular cluster M2. RR Lyrae physical parameters and new variables (2006)
Lazaro, C, Arellano Ferro, A, Arevalo, M. J, Bramich, D. M, Giridhar, S, Poretti, E
We report the results of CCD V and R photometry of the RR Lyrae stars in M2. The periodicities of most variables are revised and new ephemerides are calculated. Light curve decomposition of the RR...
A new Milky Way dwarf satellite in Canes Venatici (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Wilkinson, M. I., Irwin, M. J., Sivarani, T., ...
In this Letter, we announce the discovery of a new dwarf satellite of the Milky Way, located in the constellation Canes Venatici. It was found as a stellar overdensity in the north Galactic cap using...
A curious Milky Way satellite in Ursa Major (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Kleyna, J. T., Irwin, M. J., Wilkinson, M. I., ...
In this Letter, we study a localized stellar overdensity in the constellation of Ursa Major, first identified in Sloan Digital Sky Survey (SDSS) data and subsequently followed up with Subaru imaging....
A faint new Milky Way satellite in Bootes (2006)
Belokurov, V., Zucker, D. B., Evans, N. W., Wilkinson, M. I., Irwin, M. J., Hodgkin, S., ...
We announce the discovery of a new satellite of the Milky Way in the constellation of Bootes at a distance of ~60 kpc. It was found in a systematic search for stellar overdensities in the north...
The field of streams: Sagittarius and its siblings (2006)
Belokurov, V., Zucker, D. B., Evans, N. W., Gilmore, G., Vidrih, S., Bramich, D. M., ...
We use Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5) u, g, r, i, z photometry to study Milky Way halo substructure in the area around the north Galactic cap. A simple color cut (g-r
Upper limits on the hot Jupiter fraction in the field of NGC 7789 (2005)
We describe a method of estimating the abundance of short-period extrasolar planets based on the results of a photometric survey for planetary transits. We apply the method to a 21-night survey with...
A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005)
Udalski, A., Jaroszynski, M., Paczynski, B., Kubiak, M., Szymanski, M. K., Soszynski, I., ...
We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (
A Survey of Eclipsing Binary Stars in the Eastern Spiral Arm of M31 (2005)
Todd, Ian, Pollacco, Don, Skillen, Ian, Bramich, D. M., Bell, Steve, Augusteijn, Thomas
Results of an archival survey are presented using B-band imaging of the eastern spiral arm of M31. Focusing on the eclipsing binary star population, a matched-filter technique has been used to...
A dearth of planetary transits in the direction of NGC 6940 (2005)
Hood, Ben, Cameron, Andrew Collier, Kane, Stephen R., Bramich, D. M., Horne, Keith, Street, Rachel A., ...
We present results of our survey for planetary transits in the field of NGC 6940. We think nearly all of our observed stars are field stars. We have obtained high precision (3-10 millimags at the...
A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005)
Udalski, A., Jaroszynski, M., Paczynski, B., Kubiak, M., Szymanski, M. K., Soszynski, I., ...
We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (
A Survey for Planetary Transits in the Field of NGC 7789 (2005)
Bramich, D. M., Horne, Keith, Bond, I. A., Street, R. A., Cameron, A. Collier, Hood, B., ...
We present results from 30 nights of observations of the open cluster NGC 7789 with the WFC camera on the INT telescope in La Palma. From ~900 epochs, we obtained lightcurves and Sloan r-i colours...
A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005)
Udalski, A., Jaroszynski, M., Paczynski, B., Kubiak, M., Szymanski, M. K., Soszynski, I., ...
We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (
A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005)
Udalski, A., Jaroszynski, M., Paczynski, B., Kubiak, M., Szymanski, M. K., Soszynski, I., ...
We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (
Structure and star formation in disk galaxies. II. Optical Imaging (2004)
Knapen, J., Stedman, S., Bramich, D.M., Folkes, S.L., Bradley, T.R.
Structure and star formation in disk galaxies II. Optical imaging (2004)
Knapen, J. H., Stedman, S., Bramich, D. M., Folkes, S. L., Bradley, T. R.
We present optical observations of a sample of 57 spiral galaxies and describe the procedures followed to reduce the data. We have obtained images in the optical B and I broad bands, as well as in H...
CCD Photometry of the RR LYRAE Stars in NGC 4147 (2004)
Arellano Ferro, A., Arévalo , M. J., Bramich , D. M., Giridhar , S., Lázaro , C., Rey , M.
We report the results of CCD V and R photometry of the RR Lyrae stars known in NGC 4147. The periodicities of most variables are revised and new ephemerides are calculated. The Blazhko effect has...
Searching For Planetary Transits In The Open Cluster NGC 7789 (2003)
Bramich, D. M., Horne, K. D., Bond, I. A.
Open clusters are ideal targets for searching for transiting Hot Jupiters. They provide a relatively large concentration of stars on the sky and cluster members have similar metallicities, ages and...
Structure and star formation in disc galaxies - I. Sample selection and near-infrared imaging (2003)
Structure and star formation in disk galaxies I. Sample selection and near infrared imaging (2003)
Knapen, J. H., De Jong, R. S., Stedman, S., Bramich, D. M.
We present near-infrared imaging of a sample of 57 relatively large, Northern spiral galaxies with low inclination. After describing the selection criteria and some of the basic properties of the...