An anomaly detector with immediate feedback to hunt for planets of Earth mass and below by microlensing

@article{Dominik2007AnAD,
  title={An anomaly detector with immediate feedback to hunt for planets of Earth mass and below by microlensing},
  author={Martin Dominik and Nicholas J. Rattenbury and Alasdair Allan and Shude Mao and Daniel M. Bramich and Martin J. Burgdorf and Eamonn Kerins and Yiannis Tsapras and Lukasz Wyrzykowski},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2007},
  volume={380},
  pages={792-804}
}
The discovery of OGLE 2005-BLG-390Lb, the first cool rocky/i cy exoplanet, impressively demonstrated the sensitivity of the microlensing technique to extra-solar planets below 10 M�. A planet of 1 Minstead of the expected 5 Mfor OGLE 2005-BLG-390Lb (with an uncertainty factor of two) in the same spot would have provided a detectable deviation with an amplitude of � 3 per cent and a duration of � 12 h. While a standard sampling interval of 1.5 to 2.5 hours for microlensing follow-up observations… Expand
View PDF on arXiv
50 Citations
Background Citations
15
Methods Citations
19
Results Citations
1

Figures from this paper

50 Citations

Citation Type

Citation Type

Realisation of a fully-deterministic microlensing observing strategy for inferring planet populations
Within less than 15 years, the count of known planets orbiting stars other than the Sun has risen from none to more than 400 with detections arising from four successfully applied techniques:… Expand
Extrasolar planet detections with gravitational microlensing
Abstract Microlensing light curves due to single stars are symmetric and typically last for a month. So far about 4000 microlensing events have been discovered in real-time, the vast majority toward… Expand
P o S ( G M C 8 ) 0 3 7 Detecting Exoplanets with the Xallarap Microlensing Effect
One of the successful techniques for the detection of exopla nets relies on the magnification of an observed star resulting from microlensing by a foreground s tar orbited by a planetary companion.… Expand
Parameter degeneracies and (un)predictability of gravitational microlensing events
Some of the difficulties in determining the underlying physical properties that are relevant for observed anomalies in microlensing light curves, such as the mass and separation of extrasolar planets… Expand
A metric and optimization scheme for microlens planet searches
OGLE III and MOA-II are discovering 600–1000 Galactic bulge microlens events each year. This stretches the resources available for intensive follow-up monitoring of the light curves in search of… Expand
Detecting exoplanets with the xallarap microlensing effect
One of the successful techniques for the detection of exoplanets relies on the magnification of an observed star resulting from microlensing by a foreground star orbited by a planetary companion. We… Expand
OGLE-2008-BLG-510: First automated real-time detection of a weak microlensing anomaly - brown dwarf or stellar binary?
The microlensing event OGLE-2008-BLG-510 is characterized by an evident asymmetric shape of the peak, promptly detected by the Automated Robotic Terrestrial Exoplanet Microlensing Search (ARTEMiS)… Expand
ARTEMiS (Automated Robotic Terrestrial Exoplanet Microlensing Search): a possible expert-system based cooperative effort to hunt for planets of Earth mass and below
The technique of gravitational microlensing is currently unique in its ability to provide a sample of terrestrial exoplanets around both Galactic disk and bulge stars, allowing to measure their… Expand
OGLE-2014-BLG-1186: gravitational microlensing providing evidence for a planet orbiting the foreground star or for a close binary source?
Discussing the particularly long gravitational microlensing event OGLE-2014-BLG-1186 with a time-scale t_E ∼ 300 d, we present a methodology for identifying the nature of localised deviations from… Expand
The first extrasolar planet detected via gravitational microlensing
Abstract In gravitational microlensing, distant planetary systems may be discovered by utilizing them as naturally occuring lenses. Efforts to find planets by this technique began in the 1990s. The… Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 51 REFERENCES
A Jovian-Mass Planet in Microlensing Event OGLE-2005-BLG-071
We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (<1%) photometry at the peak of the event yields an… Expand
The 1995 Pilot Campaign of PLANET: Searching for Microlensing Anomalies through Precise, Rapid, Round-the-Clock Monitoring
PLANET (the Probing Lensing Anomalies NETwork) is a worldwide collaboration of astronomers whose primary goal is to monitor microlensing events densely and precisely in order to detect and study… Expand
The PLANET microlensing follow-up network: results and prospects for the detection of extra-solar planets
Abstract Among various techniques to search for extra-solar planets, microlensing has some unique characteristics. Contrary to all other methods which favour nearby objects, microlensing is sensitive… Expand
Microlensing constraints on the frequency of Jupiter-mass companions: Analysis of 5 years of PLANET photometry
We analyze 5 years of PLANET photometry of microlensing events toward the Galactic bulge to search for the short-duration deviations from single-lens light curves that are indicative of the presence… Expand
Microlensing by multiple planets in high-magnification events
Microlensing is increasingly gaining recognition as a powerful method for the detection and characterization of extrasolar planetary systems. Naively, one might expect that the probability of… Expand
Microlensing limits on numbers and orbits of extrasolar planets from the 1998–2000 OGLE events
We analyse three years (1998-2000) of Optical Gravitational Lensing Experiment (OGLE) observations of microlensing events to place limits on the abundance of planets with a planet-to-star mass ratio… Expand
The Use of High-Magnification Microlensing Events in Discovering Extrasolar Planets
Hundreds of gravitational microlensing events have now been detected toward the Galactic bulge, with many more to come. The detection of fine structure in these events has been theorized as an… Expand
Planetary Detection Efficiency of the Magnification 3000 Microlensing Event OGLE-2004-BLG-343
OGLE-2004-BLG-343 was a microlensing event with peak magnification Amax = 3000 ± 1100, by far the highest magnification event ever analyzed and hence potentially extremely sensitive to planets… Expand
Microlensing Sensitivity to Earth-Mass Planets in the Habitable Zone
Microlensing is one of the most powerful methods that can detect extrasolar planets, and a future space-based survey with a high monitoring frequency is proposed to detect a large sample of… Expand
Microlens OGLE-2005-BLG-169 Implies That Cool Neptune-like Planets Are Common
We detect a Neptune mass ratio (q 8 ? 10-5) 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… Expand
...
1
2
3
4
5
...