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The Hungarian Automated Telescope Network (HATNet) project is a network of six small fully automated "HAT" telescopes. The scientific goal of the project is to detect and characterize extrasolar planets using the transit method. This network is used also to find and follow bright variable stars. The network is maintained by the Harvard-Smithsonian Center for Astrophysics.

The HAT acronym stands for Hungarian-made Automated Telescope, because it was developed by a small group of Hungarians who met through the Hungarian Astronomical Association. The project started in 1999 and has been fully operational since May 2001.

Equipment

The prototype instrument, HAT-1 was built from a 180 mm focal length and 65 mm aperture Nikon telephoto lens and a Kodak KAF-0401E chip of 512 × 768, 9 μm pixels. The test period was from 2000 to 2001 at the Budapest, Konkoly Observatory.

HAT-1 was transported from Budapest to the Steward Observatory, Kitt Peak, Arizona, in January 2001. The transportation caused serious damage to the equipment.

Later built telescopes use Canon 11 cm diameter f/1.8L lenses for a wide-field of 8°×8°. It is a fully automated instrument with 2K x 2K Charge-coupled device (CCD) sensors. One HAT instrument operates at the Wise Observatory.

HAT is controlled by a single Linux PC without human supervision. Data are stored in a MySQL database.

HAT-South

From 2009, three other locations joined the HATNet with telescopes of completely new design. The telescopes are deployed to Australia, Namibia and Chile. Each system has eight (2*4) joint-mounted, quasi-parallel Takahashi Epsilon (180 mm diameter, f/2.8) astrographs with Apogee 4k*4k CCDs with overlapping fields of view. The processing computers are Xenomai-based industrial PCs with 10 TB of storage. The funding is provided until 2013.

Participants in the project

HAT-1 was developed during the undergraduate (and also the first year graduate) studies of Gáspár Bakos (Eötvös Loránd University) and at Konkoly Observatory (Budapest), under the supervision of Dr. Géza Kovács. In the development József Lázár, István Papp and Pál Sári also played an important role.

Planets discovered

Twenty-nine extrasolar planets have been discovered so far by the HATNet project (note that the discovery of the planet WASP-11b/HAT-P-10b, WASP-40b/HAT-P-27b and WASP-51b/HAT-P-30b was simultaneously announced by the SuperWASP team). All have been discovered using the transit method. In addition, the radial velocity followup has detected an additional companion, either a massive planet or a small brown dwarf around the star HAT-P-13, making this the first known transiting planet in a system with an outer companion in a well-characterised orbit.

Light green rows indicate that the planet orbits one of the stars in a binary star system.

North

Star Constellation Right
ascension 		Declination App.
mag. 		Distance (ly) Spectral
type 		Planet Mass
(MJ) 		Radius
(RJ) 		Orbital
period
(d) 		Semimajor
axis
(AU) 		Orbital
eccentricity 		Inclination
(°) 		Discovery
year 		Ref
ADS 16402 B Lacerta 22 57 47 +38° 40′ 30″ 10.4 453 G0V HAT-P-1b 0.524 1.225 4.4652934 0.0553 <0.067 86.28 2006
HD 147506 Hercules 16 20 36 +41° 02′ 53″ 8.71 440 F8 HAT-P-2b 8.65 0.951 5.63341 0.0677 0.5163 90 2007
GSC 03466-00819 Ursa Major 13 44 23 +48° 01′ 43″ 11.86 457 K HAT-P-3b 0.599 0.890 2.899703 0.03894 0 87.24 2007
BD+36°2593 Boötes 15 19 58 +36° 13′ 47″ 11.2 1010 F HAT-P-4b 0.68 1.27 3.056536 0.0446 0 89.9 2007
GSC 02634-01087 Lyra 18 17 37 +36° 37′ 16″ 12 1110 G HAT-P-5b 1.06 1.26 2.788491 0.04075 0 86.75 2007
GSC 03239-00992 Andromeda 23 39 06 +42° 27′ 58″ 10.5 650 F HAT-P-6b 1.057 1.33 3.852985 0.05235 0 85.51 2007
GSC 03547-01402 Cygnus 19 28 59 +47° 58′ 10″ 10.5 1044 F8 HAT-P-7b 1.776 1.363 2.2047299 0.0377 0 85.7 2008
GSC 02757-01152 Pegasus 22 52 10 +35° 26′ 50″ 10.17 750 F HAT-P-8b 1.52 1.5 3.07632 0.0487 0 87.5 2008
HAT-P-9 Auriga 07 20 40 +37° 08′ 26″ 12.34 1560 F HAT-P-9b 0.78 1.4 3.92289 0.053 0 86.5 2008
WASP-11/HAT-P-10 Perseus 03 09 29 +30° 40′ 25″ 11.89 408 K3V WASP-11b/HAT-P-10b 0.460 1.045 3.7224690 0.0439 0 88.5 2008
GSC 03561-02092 Cygnus 19 50 50 +48° 04′ 51″ 9.59 123.5 K4 HAT-P-11b 0.081 0.422 4.8878162 0.053 0.198 88.5 2009
HAT-P-12 Canes Venatici 13 57 34 +43° 29′ 37″ 12.84 465 K4 HAT-P-12b 0.211 0.959 3.2130598 0.0384 0 89.0 2009
GSC 3416-00543 Ursa Major 08 39 31 +47° 21′ 07″ 10.429 698 G4 HAT-P-13b 0.851 1.28 2.9162595 0.0426 0.021 83.4 2009
GSC 3416-00543 Ursa Major 08 39 31 +47° 21′ 07″ 10.429 698 G4 HAT-P-13c >15.2 428.5 1.186 0.691 2009
GSC 3086-00152 Hercules 17 20 28 +38° 14′ 32″ 9.98 670 F HAT-P-14b 1.386 1.468 4.6267669 0.0606 0.107 83.5 2010
GSC 2883-01687 Perseus 04 25 33.65 +39° 20′ 44.2″ 12.16 190 G5 HAT-P-15b 1.946 1.072 10.863502 0.0964 0.19 89.1 2010
GSC 2792-01700 Andromeda 00 38 17.56 +42° 27′ 47.2″ 10.8 235 F8 HAT-P-16b 4.193 1.289 2.77596 0.0413 0.036 86.6 2010
HAT-P-17 Cygnus 21 38 09 +30° 29′ 19″ 10.54 293.5 K HAT-P-17b 0.53 1.01 10.338523 0.0882 0.346 89.2 2010
HAT-P-17 Cygnus 21 38 09 +30° 29′ 19″ 10.54 293.5 K HAT-P-17c 1.4 1797 2.75 0.1 2010
HAT-P-18 Hercules 17 05 24 +33° 00′ 45″ 12.76 541 K HAT-P-18b 0.197 0.995 5.508023 0.0559 0.084 88.8 2010
HAT-P-19 Andromeda 00 38 04 +34° 42′ 42″ 12.9 701 K HAT-P-19b 0.292 1.132 4.008778 0.0466 0.067 88.2 2010
HAT-P-20 Gemini 07 27 40 +24° 20′ 11″ 11.34 228 K7 HAT-P-20b 7.246 0.867 2.875317 0.0361 0.015 86.8 2010
HAT-P-21 Ursa Major 11 25 06 +41° 01′ 41″ 11.46 228 G3 HAT-P-21b 4.063 1.024 4.124461 0.0494 0.228 87.2 2010
HAT-P-22 Ursa Major 10 22 44 +50° 07′ 42″ 9.73 267 G5 HAT-P-22b 2.147 1.08 3.21222 0.0414 0.016 86.9 2010
HAT-P-23 Delphinus 20 24 30 +16° 45′ 44″ 11.94 1282 G5 HAT-P-23b 2.09 1.368 1.212884 0.0232 0.106 85.1 2010
HAT-P-24 Gemini 07 15 18 +14° 15′ 44″ 11.818 998 F8 HAT-P-24b 0.681 1.243 3.3552464 0.0465 0.067 88.6 2010
HAT-P-25 Aries 03 13 45 +25° 11′ 51″ 13.19 969 G5 HAT-P-25b 0.567 1.19 3.652836 0.0466 0.032 87.6 2010
HAT-P-26 Virgo 14 12 37.55 +04° 03′ 36.13″ 11.74 437 K1 HAT-P-26b 0.059 0.565 4.234516 0.0479 0.124 88.6 2010
WASP-40/HAT-P-27 Virgo 14 51 04 +05° 56′ 50″ 12.21 665 G8 WASP-40b/HAT-P-27b 0.66 1.038 3.039586 0.0403 0.078 84.7 2011
HAT-P-28 Andromeda 00 52 00 +34° 43′ 42″ 13.03 1288 G3 HAT-P-28b 0.626 1.212 3.257215 0.0434 0.051 88 2011
HAT-P-29 Perseus 02 12 31 +51° 46′ 44″ 11.9 1050 F8 HAT-P-29b 0.778 1.107 5.72318 0.0667 0.095 87.1 2011
WASP-51/HAT-P-30 Draco 08 15 48 +05° 50′ 12″ 10.42 629 F WASP-51b/HAT-P-30b 0.711 1.34 2.810595 0.0419 0.035 83.6 2011
HAT-P-31 Cancer 08 06 09 +26° 25′ 36″ 11.66 1155 HAT-P-31b 2.171 1.07 5.005425 0.055 0.245 87.1 2011
HAT-P-32 Andromeda 02 01 10 +46° 41′ 16″ 11.29 1044 F/G HAT-P-32b 0.941 2.037 2.150009 0.0344 0.163 88.7 2011
HAT-P-33 Gemini 07 32 44 +33° 50′ 06″ 11.89 1367 F HAT-P-33b 0.763 1.827 3.474474 0.0503 0.148 86.7 2011
HAT-P-34 Sagitta 20 12 47 +18° 06′ 18″ 10.16 838 F8 HAT-P-34b 3.328 1.107 5.452654 0.0677 0.441 87.1 2012
HAT-P-35 Hydra 08 13 00 +04° 47′ 13″ 12.46 1745 F or G HAT-P-35b 1.054 1.332 3.646706 0.0498 0.025 87.3 2012
HAT-P-36 Canes Venatici 12 33 03 +44° 54′ 55″ 12.26 1034 F or G HAT-P-36b 1.832 1.264 1.327347 0.0238 0.063 86 2012
HAT-P-37 Draco 18 57 11 +51° 16′ 09″ 13.23 1341 F or G HAT-P-37b 1.169 1.178 2.797436 0.0379 0.058 86.9 2012
HAT-P-38 12.56 2094 G HAT-P-38b 0.267 0.825 4.640382 0.0523 0.067 88.3 2012
HAT-P-39 Gemini 07 35 02.0 +17° 49′ 48″ 11.42 812 F HAT-P-39b 0.599 1.571 3.54387 0.0509 - 87 2012
HAT-P-40 Lacerta 22 22 03.0 +45° 27′ 27″ 11.7 1634 F HAT-P-40b 0.615 1.73 4.45724 0.0608 - 88.3 2012
HAT-P-41 Aquila 19 49 17.0 +04° 40′ 21″ 11.09 1014 F HAT-P-41b 0.812 1.529 2.69405 0.0424 - 87.9 2012
HAT-P-42 Hydra 09 01 23.0 +06° 05′ 50″ 12.17 1458 F or G HAT-P-42b 0.975 1.277 4.64188 0.0575 - 85.9 2012
HAT-P-43 Cancer 08 35 42.0 +10° 12′ 24″ 13.36 1771 F or G HAT-P-43b 0.66 1.283 3.33269 0.0443 - 88.7 2012
HAT-P-44 Cassiopeia 00 56 50.3 +47° 00′ 52″ 13.21 1220 HAT-P-44b 0.392 1.28 4.30122 0.0507 0.072 89 2013
HAT-P-44 Cassiopeia 00 56 50.3 +47° 00′ 52″ 13.21 1220 HAT-P-44c 1.6 - 219.9 0.699 - - 2013
HAT-P-45 Cetus 00 33 09.9 −03° 22′ 51″ 12.79 995 HAT-P-45b 0.892 1.426 3.12899 0.0452 0.049 87.8 2013
HAT-P-46 Cetus 00 32 07.1 −02° 58′ 15″ 11.94 965 HAT-P-46b 0.493 1.284 4.46313 0.0577 0.123 85.5 2013
HAT-P-46 Cetus 00 32 07.1 −02° 58′ 15″ 11.94 965 HAT-P-46c 2 - 77.7 0.387 - - 2013
HAT-P-49 Vulpecula 20 21 45.928 +26° 4133.653′ 10.3 1050 F HAT-P-49b 1.73 1.41 2.6915 0.0438 0 86.2 2014
HAT-P-54 Gemini 06 39 35.53 25° 28′ 57.1″ 13.505 443 Late K HAT-P-54b 0.760 0.944 3.7998 0.04117 - 87.04 2014

South

Star Constellation Right
ascension 		Declination App.
mag. 		Distance (ly) Spectral
type 		Planet Mass
(MJ) 		Radius
(RJ) 		Orbital
period
(d) 		Semimajor
axis
(AU) 		Orbital
eccentricity 		Inclination
(°) 		Discovery
year 		Ref
HATS-1 Crater 11 32 6 −23° 21′ 170″ 12.5 988 G HATS-1b 1.855 1.302 3.44646 0.0444 0.12 85.6 2012
HATS-2 Crater 11 46 57.4 −22° 33′ 47″ 13.562 1174 K HATS-2b 1.345 1.168 1.35413 0.023 - 87.2 2013
HATS-3 Capricornus 20 49 50 −24° 25′ 44″ 11.44 1478 F HATS-3b 1.071 1.381 3.54785 0.0485 - - 2013
HATS-4 Canis Major 06 16 27.0 −21° 27′ 11″ 13.46 1370 HATS-4b 1.32 1.02 2.5167 0.0362 0.013 88.5 2014
HATS-5 Eridanus 04 28 54 −20° 31′ 05″ 12.6 838 F8 HATS-5b 0.24 0.91 4.7634 0.0542 <0.019 89.3 2014
HATS-6 05 52 35.2 −19° 01′ 54″ 15.2 484 M1V HATS-6b 0.319 0.998 3.3252725 0.03623 88.21 2014
HATS-9 19 23 14.28 −20° 09′ 59.7″ 13.3 2020 G HATS-9b 0.837 1.065 1.9153 0.03048 86.5 2015
HATS-10 19 37 13.8 −22° 12′ 16.1″ 13.1 1630 G HATS-10b 0.53 0.97 3.3128 0.04491 87.79 2015


See also

A subset of HATNet light curves are available at the NASA Exoplanet Archive.

Other extrasolar planet search projects

Extrasolar planet searching spacecraft

References

  1. ^ Bakos, G. Á.; et al. (2002). "System Description and First Light Curves of the Hungarian Automated Telescope, an Autonomous Observatory for Variability Search". Publications of the Astronomical Society of the Pacific. 114 (799): 974–987. arXiv:astro-ph/0206001. Bibcode:2002PASP..114..974B. doi:10.1086/342382.
  2. G. Bakos; Kovács; Stanek; Sasselov; Domsa; et al. (March 2004). "Wide-field millimagnitude photometry with the HAT: a tool for extrasolar planet detection". He Publications of the Astronomical Society of the Pacific. 116 (817): 266–277. arXiv:astro-ph/0401219. Bibcode:2004PASP..116..266B. doi:10.1086/382735. {{cite journal}}: Explicit use of et al. in: |author2= (help); Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)
  3. Hartman, J.D.; Bakos, G.; Stanek, K. Z.; Noyes, R. W. (October 2004). "HATNET Variability Survey in the High Stellar Density "Kepler Field" with Millimagnitude Image Subtraction Photometry". The Astronomical Journal. 128 (4): 1761–1783. arXiv:astro-ph/0405597. Bibcode:2004AJ....128.1761H. doi:10.1086/423920. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)
  4. ^ Bakos, G. Á.; et al. (2009). "HAT-P-13b,c: A Transiting Hot Jupiter with a Massive Outer Companion on an Eccentric Orbit". The Astrophysical Journal. 707 (1): 446–456. arXiv:0907.3525. Bibcode:2009ApJ...707..446B. doi:10.1088/0004-637X/707/1/446.
  5. Bakos, G. Á.; et al. (2007). "HAT-P-1b: A Large-Radius, Low-Density Exoplanet Transiting One Member of a Stellar Binary". The Astrophysical Journal. 656 (1): 552–559. arXiv:astro-ph/0609369. Bibcode:2007ApJ...656..552B. doi:10.1086/509874.
  6. Johnson, John Asher; et al. (2008). "Measurement of the Spin-Orbit Angle of Exoplanet HAT-P-1b". The Astrophysical Journal. 686 (1): 649–657. arXiv:0806.1734. Bibcode:2008ApJ...686..649J. doi:10.1086/591078.
  7. Bakos, G. Á.; et al. (2007). "HD 147506b: A Supermassive Planet in an Eccentric Orbit Transiting a Bright Star". The Astrophysical Journal. 670 (1): 826–832. arXiv:0705.0126. Bibcode:2007ApJ...670..826B. doi:10.1086/521866.
  8. Torres, G.; et al. (2007). "HAT-P-3b: A Heavy-Element-rich Planet Transiting a K Dwarf Star". The Astrophysical Journal Letters. 666 (2): L121–L124. arXiv:0707.4268. Bibcode:2007ApJ...666L.121T. doi:10.1086/521792.
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  56. HAT-P-54b: A hot jupiter transiting a 0.64 Msun star in field 0 of the K2 mission
  57. HATS-1b: The First Transiting Planet Discovered by the HATSouth Survey: K. Penev (1,2), G. Á. Bakos (1,2), D. Bayliss (3), A. Jordán (4), M. Mohler (5), G. Zhou (3), V. Suc (4), M. Rabus (4), J. D. Hartman (1,2), L. Mancini (5), B. Béky (2), Z. Csubry (1,2), L. Buchhave (6), T. Henning (5), N. Nikolov (5), B. Csák (5), R. Brahm (4), N. Espinoza (4), P. Conroy (3), R. W. Noyes (2), D. D. Sasselov (2), B. Schmidt (3), D. J. Wright (7), C. G. Tinney (7), B. C. Addison (7), J. Lázár (8), I. Papp (8), P. Sári (8) ((1) Department of Astrophysical Sciences, Princeton University, (2) CfA, (3) ANU, (4) PUC, (5) MPIA, (6) Niels Bohr Institute, (7) NSW, (8) HAA)
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  59. "HATS-5b: A Transiting hot-Saturn from the HATSouth Survey". arXiv:1401.1582. {{cite journal}}: Cite journal requires |journal= (help)
  60. "HATS-6b: A Warm Saturn Transiting an Early M Dwarf Star, and a Set of Empirical Relations for Characterizing K and M Dwarf Planet Hosts". arXiv:1408.1758. {{cite journal}}: Cite journal requires |journal= (help)
  61. "HATS-9b AND HATS-10b: TWO COMPACT HOT JUPITERS IN FIELD 7 OF THE K2 MISSION". arXiv:1503.00062. {{cite journal}}: Cite journal requires |journal= (help)
  62. "HATS-9b AND HATS-10b: TWO COMPACT HOT JUPITERS IN FIELD 7 OF THE K2 MISSION". arXiv:1503.00062. {{cite journal}}: Cite journal requires |journal= (help)

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