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K2 Search Output Columns

This document defines the catalog entries describing the K2 Data Archive.

Clicking on entries in this column will mark the entry for retrieval. To mark all entries, click one of the buttons labelled 'Mark All','Mark public', or 'Mark Proprietary'. (Unmarking all entries can be done the same way using the appropriate button.) For missions with proprietary data, the mark button element will have a yellow background and a '@' symbol to indicate data sets not yet public.

To Retrieve:
Click the button labelled 'Submit marked data for retrieval from STDADS'. This will send all the marked data set names to the data retrieval page. Follow the directions on the displayed pages.

To Coplot:
After selecting up to 15 observations to be plotted, click on the "Plot marked spectra" button to coplot the selected observations.

The spectra that you selected will be automatically scaled to the full range of wavelengths and nearly the full range of fluxes (i.e., y axis plot scale runs from 0 (or .25 * the minimum flux for spectra with negative fluxes) to the 10th highest flux). Each spectrum is automatically assigned a color, up to a maximum of 15.

For plotting Kepler light curves, y-axis scaling is slightly different. Plots scale simply from the minimum to the maximum flux. It is also recommended that only Kepler light curves from the same target be co-plotted due to the differences in flux values.

The spectra are labelled by their dataset names, with a summary of the datasets plotted given below the plot. After inspecting the plot, you may wish to change the selection of datasets which are displayed. Use your browser "Back" button to do this.

Plot range
Adjust the minimum and maximum wavelengths (in Angstroms) and minimum and maximum fluxes (in erg /cm2/sec/A) to select the spectral region of interest and to exclude noisy data. Note Kepler light curves are in units of time and uncalibrated fluxes.

Plot dimensions
Adjust the X size and Y size in pixels to create the size of plot desired. The maximum dimensions are 850 by 640 pixels.

Redraw plot
Use this button to replot the spectra when you have changed the plot range or plot dimensions.

Column Information

Non-unique K2 ID identifying corresponding entry in EPIC or the custom aperture file. Note multiple observations can be made with the same Kepler ID. Also used in naming data files.
200000811 to 251809654

Dataset Name
Dataset name associated with exposure in the form ktwo[k2_id]_[timestamp]-Cnn where nn is the Campaign number.

An integer number indicating the campaign in which the exposure was made. Campaigns 9a and 9b are designated as numbers 91 and 92. Campaigns 10a and 10b will be 101 and 102. Campaigns 11a and 11b are 111 and 112. Entering numbers 9, 10 or 11 will return both subsets. Campaigns 12 and 13 are also included.
0 to 112

Object type
Type of object based on EPIC values ("star" or "extended") and target names assigned to Custom Aperture observations.
examples: star, extended, ASTEROID, COMET, CLUSTER.M80, and TNO.2002 GV31. Many are null.

Data Release
Describes the latest data release for a particular exposure.
2 to 20

RA (J2000)
Right Ascension in decimal degrees as extracted from the ingested FITS file headers
8.4066 to 359.5417

Dec (J2000)
Declination in decimal degrees (from the FITS file headers of ingested files)
-31.4001 to 28.9859

Target Type
2-character Target type
Either LC (long cadence) or SC (short cadence)

Archive Class
archive class in science table used to distinguish long and short cadence light curves and target pixel files
only KTL and KTS (i.e., long and short cadence target pixel files) for now. Starting with Campaign 3, we will also have KLC,KSC for long and short cadence light curves. Note if both a light curve and a target pixel file exist, or just a light curve file exists, the archive class will refer to the light curve.

Current number of known papers referencing this dataset.
1 to 5

Actual Start Time
Start time from LC_START FITS keyword (?)
2014-03-12 00:18:59 to 2017-12-07 23:16:00

Actual End Time
End time from LC_END FITS keyword
2014-05-27 16:33:30 to 2018-02-25 12:39:22

Investigation ID
Investigation ID assigned by the Kepler project describing a particular GO or project observing program.
GO0001, GO0001_GO0032, etc. (Note wild cards are added automatically before and after the user-entered ID(s).)

RA proper motion
-3842 to 1236.9000

RA proper motion uncertainty
0 to 463

Dec PM
Dec proper motion
-3543.5500 to 900

Dec PM Err
Dec proper motion uncertainty
0 to 517

Hipparcos parallax(mas)
-99.1600 to 336.7200

Plx Err
Hipparcos parallax uncertainty (mas)
0.1600 to 32.8600

U Mag
U-band magnitude accurate to 0.04 magnitude
12.9410 to 31.3020

U Mag Err
U-band magnitude iuncertainty
0.0030 to 6.5920

B Mag
B-band magnitude accurate to 0.04 magnitude
0.8770 to 18.9980

B Mag Err
B-band magnitude iuncertainty
0.0100 to 1.9050

V Mag
V-band magnitude accurate to 0.04 magnitude
1.0310 to 18.0040

V Mag Err
V-band magnitude uncertainty
0.0090 to 0.9900

G Mag
G-band magnitude
8.0720 to 28.9730

G Mag Err
G-band magnitude uncertainty
0.0020 to 0.9000

R Mag
R-band magnitude
7.3530 to 19.9990

R Mag Err
R-band magnitude uncertainty
0.0020 to 0.9000

I Mag
I-band magnitude
6.4350 to 21.2630

I Mag Err
I-band magnitude uncertainty
0.0010 to 0.9000

Z Mag
Z-band magnitude accurate to 0.03 magnitude
11.6650 to 28.5290

Z Mag Err
Z-band magnitude uncertainty
0.0020 to 3.3620

J Mag
2MASS J-band magnitude.
4.5330 to 17.4810

J Mag Err
2MASS J-band magnitude uncertainty.
0.0160 to 0.2170

H Mag
2MASS H-band magnitude.
4.2380 to 16.6030

H Mag Err
2MASS H-band magnitude uncertainty.
0.0140 to 0.2180

K Mag
2MASS K-band magnitude.
4.1470 to 16

K Mag Err
2MASS K-band magnitude uncertainty.
0.0130 to 0.2170

Kepler magnitude. See the EPIC manual to see how it is calculated.
4.5520 to 25.1400

Kep Flag
Kepler magnitude flag describes how the Kepler magnitude is defined. See the EPIC manual for more information.
J, BV, JHK, and gri are the only non-null values

Hip ID
Hipparcos catalog ID,
2736 to 117644

Tyc ID
Tycho-2 catalog ID
example: 1877-1406-1

SDSS DR9 identifier
currently all null

UCAC-4 catalog ID
example: 567-025402

2MASS catalog ID, a sexagesimal, equatorial position-based source name in the form: hhmmssss+ddmmsss[ABC...]
example: 06162816+2318506

2MASS Flag
string containing 2MASS flags.
example: AAA-222-111-000-0-0

Processing Date
Date file was ingested into archive
2014-11-05 15:16:50 to 2018-05-24 20:58:49

The ratio of target flux to total flux in optimal aperture. This value is not to be confused with the Crowding values given on the Target Search page which give predictive values.
0 to 1

1.0 - the crowding value
0 to 1

flux fraction
The fraction of target flux obtained in the optimal aperture averaged for the specified data. The flux fraction in any given cadence will differ from this mean value. This value is not to be confused with the Flux Fraction value given on the Target Search page which gives a predictive values.
0 to 1

The RMS Combined Differential Photometric Precision (CDPP) time series calculated by the Kepler pipeline for a transit duration of length 3-hrs over a single quarter, in units of parts per million.
12.3590 to 93163495424

RMS Combined Differential Photometric Precision (CDPP) on 6.0-hour time scales in units of parts per million.
10.8896 to 596638040064

RMS Combined Differential Photometric Precision (CDPP) on 12-hour time scales in units of parts per million.
8.3478 to 586351116288

Module number.
2 to 24

Ouput number.
1 to 4

Channel number.
1 to 84

Nearest Neighbor
Distance to nearest 2MASS neighbor (arcsec)
0.1000 to 200.4000

Nomad ID
string containing NOMAD-1 identifiers (for sources with supplemented NOMAD1 proper motions)
currently all null

High-Level Science Products
Number of High Level Science Products (HLSP) available from MAST
3 to 36