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Title: PULSAR OBSERVATIONS USING THE FIRST STATION OF THE LONG WAVELENGTH ARRAY AND THE LWA PULSAR DATA ARCHIVE

Abstract

We present initial pulsar results from the first station of the Long Wavelength Array (LWA1) obtained during the commissioning period of LWA1 and in early science results. We present detections of periodic emission from 44 previously known pulsars, including 3 millisecond pulsars. The effects of the interstellar medium (ISM) on pulsar emission are significantly enhanced at the low frequencies of the LWA1 band (10–88 MHz), making LWA1 a very sensitive instrument for characterizing changes in the dispersion measure (DM) and other effects from the ISM. Pulsars also often have significant evolution in their pulse profile at low frequency and a break in their spectral index. We report DM measurements for 44 pulsars, mean flux density measurements for 36 pulsars, and multi-frequency component spacing and widths for 15 pulsars with more than one profile component. For 27 pulsars, we report spectral index measurements within our frequency range. We also introduce the LWA1 Pulsar Data Archive, which stores reduced data products from LWA1 pulsar observations. Reduced data products for the observations presented here can be found in the archive. Reduced data products from future LWA1 pulsar observations will also be made available through the archive.

Authors:
; ; ; ; ;  [1]; ;  [2];  [3];  [4]
  1. Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM (United States)
  2. Space Science Division, Naval Research Laboratory, Washington, DC 20375-5352 (United States)
  3. Center for Advanced Radio Astronomy, University of Texas at Brownsville, One West University Boulevard, Brownsville, TX 78520 (United States)
  4. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91106 (United States)
Publication Date:
OSTI Identifier:
22525667
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 808; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DETECTION; EMISSION; FLUX DENSITY; INDEXES; INTERSTELLAR SPACE; MHZ RANGE; PERIODICITY; PULSARS; PULSES; STAR EVOLUTION; WAVELENGTHS

Citation Formats

Stovall, K., Dowell, J., Eftekhari, T., McCrackan, M., Schinzel, F. K., Taylor, G. B., Ray, P. S., Blythe, J., Garcia, A., and Lazio, T. J. W., E-mail: stovall.kevin@gmail.com. PULSAR OBSERVATIONS USING THE FIRST STATION OF THE LONG WAVELENGTH ARRAY AND THE LWA PULSAR DATA ARCHIVE. United States: N. p., 2015. Web. doi:10.1088/0004-637X/808/2/156.
Stovall, K., Dowell, J., Eftekhari, T., McCrackan, M., Schinzel, F. K., Taylor, G. B., Ray, P. S., Blythe, J., Garcia, A., & Lazio, T. J. W., E-mail: stovall.kevin@gmail.com. PULSAR OBSERVATIONS USING THE FIRST STATION OF THE LONG WAVELENGTH ARRAY AND THE LWA PULSAR DATA ARCHIVE. United States. doi:10.1088/0004-637X/808/2/156.
Stovall, K., Dowell, J., Eftekhari, T., McCrackan, M., Schinzel, F. K., Taylor, G. B., Ray, P. S., Blythe, J., Garcia, A., and Lazio, T. J. W., E-mail: stovall.kevin@gmail.com. Sat . "PULSAR OBSERVATIONS USING THE FIRST STATION OF THE LONG WAVELENGTH ARRAY AND THE LWA PULSAR DATA ARCHIVE". United States. doi:10.1088/0004-637X/808/2/156.
@article{osti_22525667,
title = {PULSAR OBSERVATIONS USING THE FIRST STATION OF THE LONG WAVELENGTH ARRAY AND THE LWA PULSAR DATA ARCHIVE},
author = {Stovall, K. and Dowell, J. and Eftekhari, T. and McCrackan, M. and Schinzel, F. K. and Taylor, G. B. and Ray, P. S. and Blythe, J. and Garcia, A. and Lazio, T. J. W., E-mail: stovall.kevin@gmail.com},
abstractNote = {We present initial pulsar results from the first station of the Long Wavelength Array (LWA1) obtained during the commissioning period of LWA1 and in early science results. We present detections of periodic emission from 44 previously known pulsars, including 3 millisecond pulsars. The effects of the interstellar medium (ISM) on pulsar emission are significantly enhanced at the low frequencies of the LWA1 band (10–88 MHz), making LWA1 a very sensitive instrument for characterizing changes in the dispersion measure (DM) and other effects from the ISM. Pulsars also often have significant evolution in their pulse profile at low frequency and a break in their spectral index. We report DM measurements for 44 pulsars, mean flux density measurements for 36 pulsars, and multi-frequency component spacing and widths for 15 pulsars with more than one profile component. For 27 pulsars, we report spectral index measurements within our frequency range. We also introduce the LWA1 Pulsar Data Archive, which stores reduced data products from LWA1 pulsar observations. Reduced data products for the observations presented here can be found in the archive. Reduced data products from future LWA1 pulsar observations will also be made available through the archive.},
doi = {10.1088/0004-637X/808/2/156},
journal = {Astrophysical Journal},
number = 2,
volume = 808,
place = {United States},
year = {Sat Aug 01 00:00:00 EDT 2015},
month = {Sat Aug 01 00:00:00 EDT 2015}
}