open¶
- baseband_tasks.io.psrfits.open(filename, mode='r', **kwargs)[source] [edit on github]¶
Function to open a PSRFITS file.
- Parameters
- filenamestr
Input PSRFITS file name.
- mode{‘r’, ‘w’}, optional
Whether to open for reading (default) or writing.
- **kwargs
Additional arguments for opening the fits file and creating the reader.
- — For opening the fits file :
- memmapbool, optional
Is memory mapping to be used? By default, this value is obtained from the configuration item
astropy.io.fits.Conf.use_memmap(the default of which, in turn, isTrue).- — For creating the reader :
- weightedbool, optional
Whether the data should be weighted along the frequency axis. Default is
True.- verifybool, optional
Whether to do basic checks on the PSRFITS HDUs. Default is
True.- — For creating the writer :
- primary_hdu~baseband_tasks.io.psrfits.PSRFITSPrimaryHDU
Currently required to be constructed before opening the file. This limitation will be lifted in future.
- **kwargs
Further arguments to set up the SUBINT HDU. These can include ‘start_time’, ‘sample_rate’, ‘sample_shape’, ‘shape’, ‘samples_per_frame’, ‘polarization’, ‘frequency’.
- Returns
- readerfile-handle like reader for the first SUBINT HDU
- Raises
- RuntimeError
If more than one SUBINT HDU is present.
Notes
The current version` only opens and reads one SUBINT HDU and ignores all other types of HDUs.