Trans-Atlantic Exoplanet Survey

The Trans-Atlantic Exoplanet Survey, or TrES, used three 4-inch (10 cm) telescopes located at Lowell Observatory, Palomar Observatory, and Teide Observatory to locate exoplanets. It was made using the network of small, relatively inexpensive telescopes designed to look specifically for planets orbiting bright stars using the transit method. The array used 4-inch Schmidt telescopes having CCD cameras and automated search routines. The survey was created by David Charbonneau of the Center for Astrophysics, Timothy Brown of the National Center for Atmospheric Research, and Edward Dunham of Lowell Observatory.[1]

The TrES survey is no longer operational.

Discoveries

The TrES project discovered a total of five planets in its years of operation. All were discovered using the transit method. Note that the discovery papers do not use the "b" suffix typically used in extrasolar planet designations. While forms with and without the b are used in the literature, the table here uses the designations assigned by the discoverers.

Star	Constellation	Right ascension	Declination	App. mag.	Distance (ly)	Spectral type	Planet	Mass (MJ)	Radius (RJ)	P (days)	a (AU)	e	i (°)	Discovery year
GSC 02652-01324[1]	Lyra	19^h 04^m 09^s	+36° 37′ 57″	11.79	512	K0V	TrES-1b	0.61	1.081	3.030065	0.0393	0.135	88.2	2004
GSC 03549-02811^(*)[2]	Draco	19^h 07^m 14^s	+49° 18′ 59″	11.41	750 ± 30	G0V	TrES-2b	1.199	1.272	2.47063	0.03556	0	83.62	2006
GSC 03089-00929[3]	Hercules	17^h 52^m 07^s	+37° 32′ 46″	12.4	1300	G	TrES-3	1.92	1.295	1.30619	0.0226	?	82.15	2007
GSC 02620-00648^(*)[4]	Hercules	17^h 53^m 13^s	+37° 12′ 42″	11.592	1400	F8	TrES-4	0.919	1.799	3.553945	0.05091	0	82.86	2007
GSC 03949-00967[5]	Cygnus	20^h 20^m 53^s	+59° 26′ 56″	13.718	1170	G	TrES-5	1.778	1.209	1.4822446	0.02446	?	84.529	2011
Note: (*) indicates that the planet orbits one of the stars in a binary star system.

See also

TrES light curves of the Kepler field are available at the NASA Exoplanet Archive

• List of extrasolar planets

Similar exoplanet discovery projects

• XO Telescope or XO
• HATNet Project or HAT
• SuperWASP or WASP
• Kilodegree Extremely Little Telescope or KELT
• Next-Generation Transit Survey or NGTS

Exoplanet hunting spacecraft

• COROT is an ESA spacecraft launched December 2006.
• Kepler Mission is a NASA spacecraft launched March 2009.

References

1. Alonso, Roi; et al. (2004). "TrES-1: The Transiting Planet of a Bright K0V Star". The Astrophysical Journal Letters. 613 (2): L153–L156. arXiv:astro-ph/0408421. Bibcode:2004ApJ...613L.153A. doi:10.1086/425256.
2. O'Donovan, Francis T.; et al. (2006). "TrES-2: The First Transiting Planet in the Kepler Field". The Astrophysical Journal Letters. 651 (1): L61–L64. arXiv:astro-ph/0609335. Bibcode:2006ApJ...651L..61O. doi:10.1086/509123.
3. O'Donovan, Francis T.; et al. (2007). "TrES-3: A Nearby, Massive, Transiting Hot Jupiter in a 31 Hour Orbit". The Astrophysical Journal Letters. 663 (1): L37–L40. arXiv:0705.2004. Bibcode:2007ApJ...663L..37O. doi:10.1086/519793.
4. Mandushev, Georgi; et al. (2007). "TrES-4: A Transiting Hot Jupiter of Very Low Density". The Astrophysical Journal Letters. 667 (2): L195–L198. arXiv:0708.0834. Bibcode:2007ApJ...667L.195M. doi:10.1086/522115.
5. Mandushev, Georgi; et al. (2011). "TrES-5: A Massive Jupiter-sized Planet Transiting A Cool G-dwarf". The Astrophysical Journal. 741 (2). 114. arXiv:1108.3572. Bibcode:2011ApJ...741..114M. doi:10.1088/0004-637X/741/2/114.

External links

• http://www.space.com/scienceastronomy/070806_largest_exoplanet.html
• "Network of Small Telescopes Discovers Distant Planet". Lowell Observatory. Archived from the original on 2008-04-15. Retrieved 2008-10-15.