HATNet Project

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.^[1]

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 Konkoly Observatory in Budapest.^[1]

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

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.^[2][3]

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.^[4]

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

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^h 32^m 6^s	−23° 21′ 170″	12.5	988	G	HATS-1b	1.855	1.302	3.44646	0.0444	0.12	85.6	2012	[57]
HATS-2	Crater	11^h 46^m 57.4^s	−22° 33′ 47″	13.562	1174	K	HATS-2b	1.345	1.168	1.35413	0.023	-	87.2	2013
HATS-3	Capricornus	20^h 49^m 50^s	−24° 25′ 44″	11.44	1478	F	HATS-3b	1.071	1.381	3.54785	0.0485	-	-	2013
HATS-4	Canis Major	06^h 16^m 27.0^s	−21° 27′ 11″	13.46	1370		HATS-4b	1.32	1.02	2.5167	0.0362	0.013	88.5	2014	[58]
HATS-5	Eridanus	04^h 28^m 54^s	−20° 31′ 05″	12.6	838	F8	HATS-5b	0.24	0.91	4.7634	0.0542	<0.019	89.3	2014	[59]
HATS-6		05^h 52^m 35.2^s	−19° 01′ 54″	15.2	484	M1V	HATS-6b	0.319	0.998	3.3252725	0.03623		88.21	2014	[60]
HATS-9		19^h 23^m 14.28^s	−20° 09′ 59.7″	13.3	2020	G	HATS-9b	0.837	1.065	1.9153	0.03048		86.5	2015	[61]
HATS-10		19^h 37^m 13.8^s	−22° 12′ 16.1″	13.1	1630	G	HATS-10b	0.53	0.97	3.3128	0.04491		87.79	2015	[61]

See also

• List of extrasolar planets

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

Other extrasolar planet search projects

• Trans-Atlantic Exoplanet Survey or TrES
• SuperWASP or WASP
• XO Telescope or XO
• Kilodegree Extremely Little Telescope or KELT
• Next-Generation Transit Survey or NGTS

Extrasolar planet searching spacecraft

• COROT is a CNES/ESA spacecraft launched in December 2006
• The Kepler Mission is a NASA spacecraft launched in March 2009

References

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2. G. Bakos; 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.
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23. "The Extrasolar Planets Encyclopaedia (HAT-P-19)".
24. "The Extrasolar Planets Encyclopaedia (HAT-P-20)".
25. "The Extrasolar Planets Encyclopaedia (HAT-P-21)".
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External links

• The HATNet Exoplanet Survey
• The HATSouth Exoplanet Survey
• Hungarian Astronomical Association
• Wise observatory Hungarian-made Automated Telescope
• The Extrasolar Planets Encyclopaedia