pyoifits 0.4.2

OIFITS (Data Exchange Standard for Optical Interferometry, A&A 597, A8, 2017)

Purpose

Read and manipulate Optical Interferometry FITS files. For a definition of the standards

• version 2: Duvert at al. (2017), A&A 597, A8 (abstract) (pre-print)
• version 1: Pauls et al. (2005), PASP 117, 1255 (abstract) (pre-print)

Installation

Site-wide installation will be performed with sudo -H pip3 install pyoifits on unix-like systems.

At a user level, within a virtual environment, pip3 install pyoifits.

Short example

Read and merge to OIFITS datasets and tranform to a standard astropy table.

import oifits

data1 = oifits.read('file1.fits')
data2 = oifits.read('file2.fits')

data = data1 + data2

tab, C = data.to_table(correlations='numpy')
val = tab['value']
err = tab['error']
covar = C * np.outer(err, err)

There is also a short demo.

Release notes

0.4

New features:

• Method to_table() optionally returns a correlation matrix

0.4.1

Bug fixes:

• WAVELMIN & WAVELMAX FITS keywords have a correct number of significant digits
• EQUINOX FITS keyword now passes verification
• No runtime error when a duplicate INSNAME has to be renamed
• OI data (OI_VIS, OI_VIS2, OI_T3, OI_FLUX) tables merge correctly
• OI_VIS tables with different PHITYP, AMPTYP, AMPORDER, or PHIORDER can no longer be merged
• OI_FLUX tables with different FOV or FOVTYPE can not longer be merged

New features:

• OIFITS1 & OIFITS2 classes have get_visHDUs, get_vis2HDUs, get_T3HDUs methods

0.4.2

New features:

• to_table() allows the user to restrict to a subset of target names, instrument setup names, arrays, wavelength range, and/or date range
• OIFITS classes have new method visualize() to plot an interferometric observable as a function of time, baseline length, or spatial frequency.