K2SC Search Output Columns

This document defines the catalog entries describing the K2SC Data Archive.

Mark
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

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.
200004466 to 229228998
Dataset Name: Abbreviated Dataset name associated with exposure in the form k2sc[k2_id]-Cnn where nn is the Campaign number.
K2SC200000811-C03
Campaign: A sequential number indicating the campaign in which the exposure was made. A -1 refers to the engineering test data taken before Campaign 0.
3 to 102
Object type: Type of object based on EPIC values ("star" or "extended"), target names assigned to Custom Aperture observations (e.g., TNO.2002 GV31), and categories assigned to the engineering test data (eclipsing binaries, engineering data, cool stars,...).
exmaples: star, extended, TNO and TNO.2002 GV31. Many are null.
Data Release: Describes the latest data release for a particular exposure. Engineering test data was assigned a data release of -1.
11 to 9
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 26.5355
Target Type: 2-character Target type
Either LC (long cadence) or SC (short cadence) but currently only LC light curves have been received.
Archive Class: archive class in science table.
only KLC for light curves.
Ref: Current number of known papers referencing this dataset.
1
Actual Start Time: Start time from LC_START FITS keyword (?)
2014-11-15 14:20:48 to 2016-07-13 02:04:03
Actual End Time: End time from LC_END FITS keyword
2015-01-23 18:22:21 to 2016-09-20 05:06:45
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
-1153.6000 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
Plx: Hipparcos parallax(mas)
-74.4600 to 336.7200
Plx Err: Hipparcos parallax uncertainty (mas)
0.2500 to 12.8500
U Mag: U-band magnitude accurate to 0.04 magnitude
14.4960 to 28.5510
U Mag Err: U-band magnitude iuncertainty
0.0030 to 4.6070
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 21.8900
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
12.8290 to 28.5290
Z Mag Err: Z-band magnitude uncertainty
0.0030 to 3.3620
J Mag: 2MASS J-band magnitude.
5.0560 to 17.3250
J Mag Err: 2MASS J-band magnitude uncertainty.
0.0160 to 0.2170
H Mag: 2MASS H-band magnitude.
4.2740 to 16.5370
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 24.9000
Kep Flag: Kepler magnitude flag describes how Kepler magnitude is defined. See the EPIC manual for more information.
gri is only value currently
Hip ID: Hipparcos catalog ID,
2736 to 113310
Tyc ID: Tycho-2 catalog ID
example: 1877-1406-1
SDSS ID: SDSS DR9 identifier
currently all null
UCAC ID: UCAC-4 catalog ID
example: 567-025402
2MASS ID: 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
2015-07-15 17:53:22 to 2016-12-20 21:34:43
crowding: 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
contamination: 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
cdpp3: 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
cdpp6: RMS Combined Differential Photometric Precision (CDPP) on 6.0-hour time scales in units of parts per million.
10.8896 to 596638040064
cdpp12: RMS Combined Differential Photometric Precision (CDPP) on 12-hour time scales in units of parts per million.
8.3478 to 586351116288
Module: Module number.
2 to 24
Output: Ouput number.
1 to 4
Channel: 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 22
stpropflag: Stellar Properties Flag
null for now