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.
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.
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.
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.
Adjust the X size and Y size in pixels to create the size of plot
desired. The maximum dimensions are 850 by 640 pixels.
Use this button to replot the spectra when you have changed the plot range or plot dimensions.
- K2 ID
- 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 248368917
- 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. Entering numbers 9 or 10 will return both subsets.
0 to 92
- Object type
- Type of object based on EPIC values ("star" or "extended") plus target names assigned to Custom Aperture observations (e.g., extended.M35).
star, extended, extended.M35 and TNO.2002 GV31. Many are null.
- Data Release
- Describes the latest data release for a particular exposure.
2 to 11
- RA (J2000)
- Right Ascension in decimal degrees as extracted from the ingested FITS file headers
8.4066 to 344.6240
- Dec (J2000)
- Declination in decimal degrees (from the FITS file headers of ingested files)
-31.0812 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 2016-05-22 15:13:27
- Actual End Time
- End time from LC_END FITS keyword
2014-05-27 16:33:30 to 2016-07-02 22:34:22
- 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 PM
- RA proper motion
-1126.6000 to 1236.9000
- RA PM Err
- RA proper motion uncertainty
0 to 463
- Dec PM
- Dec proper motion
-2709.1900 to 882
- 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 24
- 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 5.9350
- 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 1.6530
- V Mag
- V-band magnitude accurate to 0.04 magnitude
1.0310 to 17.8350
- V Mag Err
- V-band magnitude uncertainty
0.0090 to 0.9900
- G Mag
- G-band magnitude
8.2020 to 23.2310
- G Mag Err
- G-band magnitude uncertainty
0.0020 to 0.9000
- R Mag
- R-band magnitude
7.4260 to 19.9990
- R Mag Err
- R-band magnitude uncertainty
0.0020 to 0.9000
- I Mag
- I-band magnitude
6.4350 to 20.8530
- I Mag Err
- I-band magnitude uncertainty
0.0010 to 0.9000
- Z Mag
- Z-band magnitude accurate to 0.03 magnitude
12.0780 to 28.5290
- Z Mag Err
- Z-band magnitude uncertainty
0.0020 to 3.3620
- J Mag
- 2MASS J-band magnitude.
4.5330 to 17.3250
- J Mag Err
- 2MASS J-band magnitude uncertainty.
0.0160 to 0.2170
- H Mag
- 2MASS H-band magnitude.
4.2380 to 16.5240
- H Mag Err
- 2MASS H-band magnitude uncertainty.
0.0140 to 0.2170
- K Mag
- 2MASS K-band magnitude.
4.2670 to 15.9190
- K Mag Err
- 2MASS K-band magnitude uncertainty.
0.0130 to 0.2170
- KEP Mag
- Kepler magnitude. See the EPIC manual to see how it is calculated.
4.5520 to 25
- 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 113310
- Tyc ID
- Tycho-2 catalog ID
- SDSS ID
- SDSS DR9 identifier
currently all null
- UCAC ID
- UCAC-4 catalog ID
- 2MASS ID
- 2MASS catalog ID, a sexagesimal, equatorial position-based source name in the form: hhmmssss+ddmmsss[ABC...]
- 2MASS Flag
- string containing 2MASS flags.
- Processing Date
- Date file was ingested into archive
2014-11-05 15:16:50 to 2016-10-04 18:34:47
- 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.
0.0043 to 1
- 1.0 - the crowding value
0 to 0.9957
- 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.
0.0003 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.
14.5537 to 149350976
- RMS Combined Differential Photometric Precision (CDPP) on 6.0-hour time scales in units of parts per million.
13.1858 to 113661920
- RMS Combined Differential Photometric Precision (CDPP) on 12-hour time scales in units of parts per million.
12.2085 to 84556584
- Module number.
2 to 24
- Ouput number.
1 to 4
- Channel number.
1 to 84
- Nearest Neighbor
- Distance to nearest 2MASS neighbor (arcsec)
0.4000 to 151.4000
- 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 24