Arecibo Timing Observations of 17 Pulsars along the Galactic Plane

We present phase-coherent timing solutions obtained for the first time for 17pulsars discovered at Arecibo by Hulse & Taylor (1975ab) in a 430-MHz survey ofthe Galactic plane. This survey remains the most sensitive of the Galacticplane at 430 MHz and has comparable equivalent sensitivity to the 1400-MHzParkes multibeam survey. Comparing both surveys we find that, as expected, theone at 430 MHz is limited in depth by interstellar dispersion and scatteringeffects; and that the detection rate of pulsars with high spin-down luminosity($\dot E>10^{34}$ erg s$^{-1}$) at the low frequency is a factor of 5 smallerthan at high frequency. We also present scatter-broadening measurements for twopulsars and pulse nulling and mode-changing properties for two others.Comment: 10 pages, 3 figures, accepted for publication in A