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 currently contains about 1.1 million light curves in the KELT fields: N02, N04, N06, N08, N10 and N12. 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

The 4.5cm KELT-North Telescope (Winer Observatory, Arizona). The KELT detector is an Apogee Instruments AP16E thermoelectrically cooled camera, using a front-side illuminated 4096 x 4096 Kodak KAF-16801E CCD with 9-micron pixels. Further details are provided in Pepper et al. 2007.

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
+31.66
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
+31.66
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
+31.66
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
+31.66
13:39
+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
+31.66
17:31
+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
+31.66
21:23
+31:40
303.78
to
337.67
+18.35
to
+44.42
2454259.8

06/08/2007

2454794.7

11/24/2008

227,052
† 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 utilized 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 was 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 which 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 60s.

Additional Project Resources

KELT Data Acknowledgement

  • 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.

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."


Last updated: 18 August 2016