SPIN-DOWN MEASUREMENT OF PSR J1813-1749: THE ENERGETIC PULSAR POWERING HESS J1813-178
- Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027-6601 (United States)
Two new X-ray timing observations of the 44.7 ms pulsar in G12.82-0.02/HESS J1813-178 were obtained with Chandra and XMM-Newton to determine its precise spin-down rate. With a period derivative of P-dot 1.265 Multiplication-Sign 10{sup -13}, PSR J1813-1749 is the third most energetic pulsar in the Galaxy, having spin-down luminosity E-dot 5.6 Multiplication-Sign 10{sup 37} erg s{sup -1}. Lack of pulsed detection in a deep radio search from the Green Bank Telescope, and in {gamma}-rays from Fermi, are reported. We reconsider the distance to PSR J1813-1749/G12.82-0.02 in view of its large X-ray measured column density, N{sub H} = 10 Multiplication-Sign 10{sup 22} cm{sup -2}, which exceeds the visual extinction A{sub V} = 9.1 to a young stellar cluster at d = 4.8 kpc that has been associated with it. Although the distance may well be larger, existing data do not constrain it further. The small radiative output of PSR J1813-1749/G12.82-0.02 in all bands would not exceed its spin-down power at any distance in the Galactic disk.
- OSTI ID:
- 22047713
- Journal Information:
- Astrophysical Journal Letters, Vol. 753, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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