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) | Table Access Protocol (TAP) Access | 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
- KELT website
- The Kilodegree Extremely Little Telescope (KELT): A Small Robotic Telescope for Large-Area Synoptic Surveys, Pepper et al. (2007): Provides the main overview of the telescope and instrumentation
- KELT-1b: A Strongly Irradiated, Highly Inflated, Short Period, 27 Jupiter-mass Companion Transiting a Mid-F Star, Siverd et al. (2012): Provides some updates to details in Pepper et al. (2007), plus an overview of the data reduction.
- KELT Wikipedia page
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: 12 July 2021
