burstfit.utils.astro

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dedisperse

def dedisperse(data, dm, tsamp, freqs)

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Function to dedisperse the data

Arguments:

• data - Frequency-time array to dedisperse
• dm - Dispersion Measure to dedisperse at
• tsamp - Sampling time in seconds
• freqs - Frequencies array (MHz)

Returns:

• dedispersed - Dedispersed array
• delay_bins - Delay in number of bins
• delay_time - Delay times (s)

finer_dispersion_correction

def finer_dispersion_correction(dedispersed_model, delay_time, delay_bins, tsamp)

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Function to correct for dispersion within a time sample.

Arguments:

• dedispersed_model - Dedispersed FT array
• delay_time - Delay times in seconds
• delay_bins - Delays in number of bins
• tsamp - Sampling time (s)

Returns:

• dedispersed_model_corrected - Dedispersed and corrected array

radiometer

def radiometer(tsys, gain, bw, w)

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Calculates the radiometer noise

Arguments:

• tsys - Receiver Tsys in Kelvin
• gain - Receiver gain in K/Jy
• bw - Bandwidth of the data or burst (in Hz)
• w - Tsamp (s)

Returns: