search

tasoc / photometry

The TASOC Photometry Pipeline
https://tasoc.dk
GNU General Public License v3.0
18 stars 4 forks source link

Output units of mag2flux #24

Closed Bhavesh012 closed 3 years ago

Bhavesh012 commented 3 years ago

Query

In the utility function, photometry.utilities.mag2flux(mag, zp=20.60654144), what is the units of output flux? Is it in e-/s or in physical units W/m^2?

Also, what is the zp in the function? What it represents?

rhandberg commented 3 years ago

The mag2flux function outputs electrons per second. It is a utility function we use for converting TESS magnitudes to the flux measured by the TESS cameras. The zp is the zero-point in the conversion from flux to magnitudes and is derived from a fit to all the stars in a given Sector: Tmag = -2.5*log_10(flux) + zp

This is described in the upcoming paper on the TASOC Photometry Pipeline (Handberg et al., in prep) and also in the latest data release notes: https://tasoc.dk/docs/release_notes/TASOC-0004-01/TASOC-0004-01.pdf

Bhavesh012 commented 3 years ago

Any possible way of getting the output flux in W/m^2 instead of having it in e-/s?