Configuration File¶
The configureration file (config.txt) contains most of the necessary information described in Further Information: Adding New Surveys and it looks like this:
survey |
filters |
zp |
pixel_scale |
mag_sys |
mag_sys_conv |
|---|---|---|---|---|---|
DES |
grizY |
30 |
0.263 |
AB |
0.0 |
PS1 |
grizy |
25 |
0.25 |
AB |
0.0 |
SDSS |
ugriz |
22.5 |
0.396 |
AB |
0.0 |
GALEX |
FUV,NUV |
18.82,20.08 |
1.5 |
AB |
0.0 |
2MASS |
J,H,Ks |
header |
1.0 |
Vega |
0.91,1.39,1.85 |
WISE |
W1,W2,W3,W4 |
header |
1.375 |
Vega |
2.699,3.339,5.174,6.620 |
unWISE |
W1,W2,W3,W4 |
22.5 |
2.75 |
Vega |
2.699,3.339,5.174,6.620 |
LegacySurvey |
grz |
22.5 |
0.262 |
AB |
0.0 |
Spitzer |
IRAC.1,IRAC.2,IRAC.3,IRAC.4,MIPS.1 |
header |
0.6,2.45 |
AB |
0.0 |
Vista |
Z,Y,J,H,Ks |
header |
0.339 |
Vega |
0.502,0.600,0.916,1.366,1.827 |
HST |
WFC3/UVIS,WFC3/IR |
header |
0.04,0.13 |
AB |
0.0 |
SkyMapper |
uvgriz |
header |
0.5 |
AB |
0.0 |
SPLUS |
u,F378,F395,F410,F430,g,F515,r,F660,i,F861,z |
header |
0.55 |
AB |
0.0 |
UKIDSS |
ZYJHK |
header |
0.4 |
Vega |
0.528,0.634,0.938,1.379,1.900 |
where survey is the internal name of the survey used by HostPhot, filters are the available filters (or instrument for HST) either as a single string (for single character filters, e.g. grizy) or separated by commas (no spaces), zp are the zero-points (ZPs) separated by commas if multiple ZPs are used or the string header in which case HostPhot will look for the keyword MAGZP (sometimes added by HostPhot), pixel_scale is the pixel scaling of the images in units of arcsec/pixel, mag_sys is the magnitude system, and mag_sys_conv is the magnitude system convertion factor such that \(m_{\text{AB}} = m_{\text{Vega}} + \text{mag_sys_conv}\). The last twos columns are not used by HostPhot (at the moment at least). They are mainly for completeness in case a user needs the photometry in different units.