HALO

Each target is organized into a subdirectory structure, based on the K2 Campaign it is found in.  Campaign directories are not zero-padded.  For Campaign 10, it follows the mission directory structure, where because the Campaign was split into two parts, the campaign directory for the second part of Campaign 10 is stored under: 

<c102>/

The data file types:

The data extension (first extension) of the _lc.fits files consists of the following columns:

• TIME = time at mid-point of cadence, in K2 truncated Julian Day
• FLUX = HALO flux from the aperture (prior to running k2sc)
• FLUX_ERR = uncertainty in the FLUX column
• CENTROID_COL = ignore, use POS_CORR1 instead
• CENTROID_ROW = ignore, use POS_CORR2 instead
• QUALITY = quality flag, inherited from the mission data products
• CADENCENO = unique integer incremented by one with each cadence
• POS_CORR1 = column component of the local image motion calculated from the motion polynomials, in pixels relative to the Quarter's mid-cadence
• POS_CORR2 = row component of the local image motion calculated from the motion polynomials, in pixels relative to the Quarter's mid-cadence
• TR_POSITION = systematic trend related to (x,y) as found by the k2sc detrending
• TR_TIME = trend in time found by the k2sc detrending
• CORR_FLUX = FLUX - TR_POSITION + MEDIAN(TR_POSITION)

Note: The light curve file for 98 Tauri = EPIC 200173870, from Campaign 13 (hlsp_halo_k2_llc_200173870-c13_kepler_v1_lc.fits) was reduced poorly by the standard pipeline.  Instead, the FITS file here was reduced using a custom apertured selected by hand by the HALO team.

Please remember to cite the appropriate paper(s) below and the DOI if you use these data in a published work. 

Note: These HLSP data products are licensed for use under CC BY 4.0.