WFCAM Transit Survey

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WFCAM Transit Survey

Post by Borislav on 19th July 2010, 5:55 pm

http://www.jach.hawaii.edu/about/director/KAS10.pdf
planet detectionby transit photometry of M dwarfs

results from 1/32 of the survey volume
20,000 stars monitored
17 good candidates identified for follow-up


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Re: WFCAM Transit Survey

Post by Borislav on 28th August 2010, 3:02 am

http://www.ucm.es/info/carmenes/lisboa/S4posters.txt


Title: Search for Variable Stars in the Near-Infrared with the WFCAM
Transit Survey

Authors: Hristo Stoev, Luis M. Sarro, Andres Moya

Abstract: The poster presents data on stellar variability in the near-infrared
as a result of data mining in the WFCAM Transit Survey as part of the
Rocky Planets around Cool Stars (RoPACS) project. RoPACS project is
aimed at discovering and studying extrasolar planets around M-type
stars utilising the J-filter band to ensure that such cool stars are
detectable out to the greatest distance. A pipeline is developed which
scans for variability more than 40000 stars with recorded measurements
at 900 epochs. It makes use of Fourier transform methods and
least-square algorithms and as a result, the intrinsic variability
parameters of the stars are provided. Examples of classical variarble
stars are displayed and partial results from an extensive
classification of variable stars in the field are presented.

Title: Spectroscopic follow-up for the WTS/RoPACS candidates

Authors: P. Cruz, D. Barrado

Abstract: This work is dedicated to spectroscopically classify planet host
candidates from the WFCAM Transit Survey (WTS). The RoPACS network
utilizes WTS to discover and study planets around cool stars at
infrared wavelengths via the transit method. Follow-up has been
performed for some of the candidates to find their spectral types and
to exclude false positives. Those candidates which survive the
low-resolution spectral classification undergo a more detailed
follow-up with medium-resolution spectroscopy in order to detect
changes in their radial velocities. Partial results from observations
taken with the 3.5-meter telescope at the Calar Alto Observatory are
presented here.

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Re: WFCAM Transit Survey

Post by Borislav on 28th August 2010, 3:08 am

http://www.ucm.es/info/carmenes/lisboa/S4talks.txt

Title: The WFCAM Transit Survey: a search for rocky planets around cool stars

Authors: J.L Birkby, S. Hodgkin, D. Pinfield, the WTS consortium & the
RoPACS consortium

Abstract: The theory of core accretion makes two intriguing, observable
predictions: i) that the formation of rocky/icy planets is common
around M-dwarfs, and ii) that hot-Jupiters are extremely difficult to
produce around low-mass stars. Furthermore, due to their small
physical size and lower bolometric luminosity, M-dwarfs are up to 300
x more sensitive to planetary transits in their habitable zones than
solar-type stars. We present here the WFCAM Transit Survey (WTS); an
ambitious, near-infrared photometric monitoring campaign of ~6000
M-dwarfs across four 1.5 sq deg fields situated >5 degrees above and
below the galactic plane. We utilise a unique opportunity provided by
the highly efficient queue-scheduled operational mode of the UKIRT to
observe our fields, with at least one visible at any time, when
atmospheric conditions and RA coverage are unsuitable for other
ongoing UKIRT programs. By probing the peak of the M-dwarf spectral
energy distribution (13<17), we obtain a statistically significant
sample of low-mass stars, which allows us to place meaningful
constraints on the occurrence and formation of planets around
M-dwarfs. The WTS has achieved one thousand epochs after 2 years in
one of our target fields and will continue until April 2012. Our light
curves have a per datapoint photometric precision of ~3-4 mmag for the
brightest objects, with RMS scatter < 1% for J< 16, sufficient to
detect Earth-like transits around M-dwarfs. I report here on the goals
of our survey, our most recent results and the properties of our
M-dwarf target sample. I also discuss our processing methods and how
we combat the challenges encountered when observing occultations of
faint red stars and the spectroscopic follow-up required to confirm
them. (http://www.ast.cam.ac.uk/~sth/wts/index.html)

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Re: WFCAM Transit Survey

Post by Daniel on 23rd March 2012, 11:06 pm

Low-mass Habitable Exoplanets with a Wide-field Infrared Space Telescope

http://www.ipac.caltech.edu/wfir2012/abstracts/Martin.pdf

Here! look like that I found the presentation in the 16th International Conference on Gravitational Microlensing

http://www.ipac.caltech.edu/wfir2012/talks/Pasadena-Feb2012-emartin.pdf
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Re: WFCAM Transit Survey

Post by Sirius_Alpha on 4th October 2012, 8:27 pm


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