tynt

tynt is a super lightweight package containing approximate transmittance curves for more than one thousand astronomical filters, weighing in at just 186 KB. Depends only on numpy and astropy.

Contents

• Installation
• Getting Started
  • Approximating a filter transmittance curve
  • Plotting all SDSS curves
  • Comparing the approximation to the true transmittance
  • Constructing an astropy model transmittance curve
  • Getting transmittance curves not included by default
• Build a custom archive
  • Build your own copy of the default tynt filter coefficients
  • Build your own copy of ALL of the SVO FPS filter coefficients
• Available Filters
• Reference/API
  • tynt Package

Simple example

Let’s plot the transmittance curve of the SDSS r’ filter:

from tynt import FilterGenerator

f = FilterGenerator()
filt = f.reconstruct('SLOAN/SDSS.rprime_filter')

import matplotlib.pyplot as plt
plt.plot(filt.wavelength, filt.transmittance)
plt.xlabel('Wavelength [$\AA$]')
plt.ylabel('Approx. Transmittance')

(Source code, png, hires.png, pdf)

Links

• Source code (GitHub)

• Docs

• Issues

References

This research has made use of the SVO Filter Profile Service (http://svo2.cab.inta-csic.es/theory/fps/) supported from the Spanish MINECO through grant AYA2017-84089

• The SVO Filter Profile Service. Rodrigo, C., Solano, E., Bayo, A.

• The Filter Profile Service Access Protocol. Rodrigo, C., Solano, E.