calibstars-EXPID

Summary:

Auxilliary file with information on calibration stars.

Naming Convention:

calibstars-{EXPID}.csv, where {EXPID} is the 8-digit exposure ID.

Regex:

calibstars-[0-9]{8}\.csv

File Type:

CSV, 50 KB

Contents

The file should have these columns:

Name	Type	Description
FIBER	int	Fiber ID on the CCDs [0-4999]
RCALIBFRAC	float	Ratio of r-band spectro flux / model flux
EBV	float	Galactic extinction E(B-V) reddening from SFD98
MODEL_COLOR	float	G-R color of best fit model
DATA_COLOR	float	G-R color of data
X	float	X location on focal plane [mm]
Y	float	Y location on focal palne [mm]
VALID	int	stdstar selected as good

Standard stars are selected as valid to use by comparing the scatter of the flux to the model fits for all stdstars across petals. 3-sigma outliers in RCALIBFRAC are rejected, as are stars whose G-R color differs by more than 0.2*EBV from their best fit model.