KELT Information


View a graphic of the
surveyed KELT fields:



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The Kilodegree Extremely Little Telescope (KELT) survey consists of two robotic telescopes that are conducting a survey for transiting exoplanets around bright stars.

The NASA Exoplanet Archive contains about 7.0 million light curves in 28 KELT Northern and Southern fields. Additionally, the archive hosts an older data set of the Praesepe field that was previously referred to as KELT. As of May 4, 2015, it has been re-named to KELT-Praesepe.

Telescope and Instruments

KELT consists of two telescopes: KELT-North (Pepper et al. 2007), which observes the northern hemisphere from Winer Observatory in Sonoita, Arizona, and KELT-South (Pepper et al. 2012), located in Sutherland, South Africa, which surveys much of the southern hemisphere. Each telescope has a Mamiya 645 80 mm f/1.9 42 mm lens with a 4k x 4k Apogee CCD on a Paramount ME mount. The KELT telescopes have a 23" pixel scale, a 26° x 26° field of view, and a 20-30 minute cadence.

Currently Available Data

Survey Summary

Field Center RA/Dec (deg) Center RA/Dec Min/Max RA (deg) † Min/Max Dec (deg) † Start JD/Calendar (days) End JD/Calendar (days) Number of Light Curves
N02 30.52
+31.67
02:02
+31:40
14.19
to
47.25
+18.34
to
+44.42
2454034.7

10/26/2006

2454794.9

11/24/2008

179,443
N04 88.56
+31.67
05:54
+31:40
71.26
to
104.68

+18.36
to
+44.51
2454035.8

10/27/2006

2454795.0

11/24/2008

390,238
N06 146.60
+31.67
09:46
+31:40
131.51
to
163.70
+18.38
to
+44.51
2454035.0

10/26/2006

2454794.0

11/23/2008

119,480
N08 204.64
+31.67
13:38
+31:40
188.05
to
219.85
+18.49
to
+44.54
2454094.0

12/24/2006

2454792.0

11/21/2008

62,942
N10 262.68
+31.67
17:30
+31:40
248.03
to
279.13
+18.51
to
+44.52
2454155.0

02/23/2007

2454779.6

11/09/2008

139,928
N12 320.72
+31.67
21:22
+31:40
303.78
to
337.67
+18.35
to
+44.42
2454259.8

06/08/2007

2454794.7

11/24/2008

227,052
S05 91.8
+3.0
06:07
+03:00
78.54
to
104.57
-9.72
to
+15.73
2455256.3

02/28/2010

2457122.2

04/09/2015

553,008
S12 253.0
+3.0
16:52
+03:00
239.94
to
265.94
-9.82
to
+15.84
2455268.6

03/13/2010

2456914.3

09/13/2014

262,966
S13 275.55
+3.06

262.96
to
288.13
-9.73
to
+15.86
2450007.0

10/16/2009

2458020.3

09/23/2017

497,440
S14 299.0
+3.0
19:56
+03:00
285.90
to
311.25
-9.74
to
+15.85
2455298.6

04/12/2010

2456954.3

10/23/2014

686,028
S17 0.00
-53.0
00:00
-53:00
0.00
to
359.99
-65.83
to
-39.20
2455378.7

07/01/2010

2457256.7

08/22/2015

6,134
S18 23.0
-53.0
01:32
-53:00
0.34
to
360.00
-65.81
to
-39.27
2455378.7

07/01/2010

2456870.7

08/01/2014

23,525
S19 46.0
-53.0
03:04
-53:00
20.62
to
73.87
-65.80
to
-39.19
2455256.3

02/28/2010

2456471.7

06/28/2013

17,204
S20 69.0
-53.0
04:36
-53:00
41.61
to
97.42
-65.75
to
-39.09
2455256.3

02/28/2010

2456390.3

04/07/2013

86,308
S21 91.8
-53.0
06:07
-53:00
65.28
to
120.59
-65.67
to
-39.13
2455256.3

02/28/2010

2458244.2

05/05/2018

174,162
S22 138.0
-20.0
09:12
-20:00
123.29
to
152.39
-32.64
to
-6.81
2455258.3

03/02/2010

2457027.6

01/05/2015

488,560
S23 161.0
-20.0
10:44
-20:00
146.18
to
174.94
-32.65
to
-6.99
2455268.3

03/12/2010

2456848.2

07/09/2014

271,146
S24 184.0
-30.0
12:16
-30:00
167.10
to
200.65
-42.72
to
-16.75
2455268.3

03/12/2010

2457971.2

08/05/2017

276,376
S25 207.0
-30.0
13:48
-30:00
190.43
to
223.65
-42.71
to
-16.67
2455268.4

03/12/2010

2457056.5

02/03/2015

267,012
S26 230.0
-20.0
15:20
-20:00
215.34
to
244.57
-32.77
to
-6.95
2455268.5

03/12/2010

2457274.3

09/08/2015

397,947
S29 345.0
-36.0
23:00
-36:00
0.00
to
359.98
-65.86
to
-39.08
2455312.7

04/26/2010

2457178.7

06/05/2015

41,660
S30 45.0
-36.0
03:00
-36:00
26.50
to
63.39
-48.30
to
-22.70
2455805.5

08/31/2011

2457086.3

03/04/2015

174,308
S32 0.85
-29.83
00:03
-29:49
0.00
to
360.00
-42.35
to
-16.83
2455091.3

09/16/2009

2456870.7

08/01/2014

131,058
S34 123.4
-54.0
08:13
-54:00
95.72
to
153.77
-66.59
to
-40.01
2455200.4

01/03/2010

2456822.2

06/13/2014

327,124
S35 115.05
-20.0
07:40
-20:00
100.38
to
129.13
-32.44
to
-7.13
2456423.2

05/10/2013

2458027.6

10/01/2017

465,180
S36 261.0
-53.0
17:24
-53:00
233.08
to
289.26
-65.78
to
-39.10
2456428.4

05/15/2013

2458409.3

10/17/2018

618,824
S37 226.8
-53.0
15:07
-53:00
199.52
to
250.40
-65.74
to
-38.81
2456541.3

09/05/2013

2457277.3

09/11/2015

363,316
S38 192.6
-53.0
12:50
-53:00
165.05
to
219.55
-65.28
to
-39.06
2456647.6

12/21/2013

2457385.6

12/29/2015

463,080
† The Min/Max for RA and Dec in each field correspond to objects with light curves in the archive.

Exoplanet Archive KELT Resources

  Interactive Tables (Also see: How to use interactive tables) Bulk Data Download Documentation and Other Information
KELT Time Series

Search Data Set


Download Light Curves

(see "KELT Dataset")


Data Column Definitions
KELT-Praesepe

Interactive Table


Download Light Curves

(see "KELT Praesepe")


General Information

Observed Filters

KELT used a Kodak Wratten No. 8 filter. The filter essentially transmits all light redward of 500nm. In practice, the filter acts as a very broad Johnson R-band filter, which we call RK.

Photometric Technique

Because all data in the set were taken with the above filter, we calibrated the absolute magnitudes of the observations to RK, listed as Johnson R, even though there is a significant color term that could be as large as -0.3 magnitudes for very blue stars, to +0.8 magnitudes for very red stars. Details of the photometric calibrations and other data reduction steps are given in Siverd et al. (2012), with a more comprehensive discussion of the filter and calibrations in the KELT instrumentation paper (Pepper et al. 2007).

Exposure times were 150s.

Additional Project Resources

Requested KELT Data Acknowledgement

If you make use of data from this archive, please include the following acknowledgement:

"These data are made available to the community through the Exoplanet Archive on behalf of the KELT project team."
  • Early work on KELT-North was supported by NASA Grant NNG04GO70G.
  • Work on KELT-North was partially supported by NSF CAREER Grant AST-1056524 to S. Gaudi.
  • Work on KELT-North received support from the Vanderbilt Office of the Provost through the Vanderbilt Initiative in Data-intensive Astrophysics.

In addition to the language provided on this page, please include the following Digital Object Identifier (DOI) as part of your acknowledgment:

DOI 10.26133/NEA8

See the full list of NASA Exoplanet Archive DOIs for other data sets and services.



Last updated: 8 September 2020