The following document lists the file abstract/SUNGER_3C58_SP.abs
from catalogue VI/111.
A plain copy of the file
(without headers/trailers) may be downloaded.
In the following, we propose to obtain additional observations using the ISO spectrometers of 3C58 which is visible from now until March 16 1998. This short visibility window requres a fast turnaround time to enable the observations to be scheduled. We would like to transfer and upgrade time available from another programme (SUNGER PSR1259, 7200s) to assist in the time allocation required. Observations of the SNR 3C58 and the Crab offer us the unique opportunity to contrast two distinctly different young pulsars. According to models (based eg on radio filaments), a lot of thermal gas (much more than in the Crab) should exist within 3C58. Our LWS observations indicate that the FIR lines in 3C58 are much weaker than the Crab. ISO offers us the unique opprotunity to determine the composition of this gas and its ionization state. For example, in Cas A it has long been a mystery why no Neon is observed in the optical. Our SWS observations resolve this issue with the detection of \[NeII\], \[NeIII\], \[SIII\], \[ArII\], \[ArIII\] and \[SiII\]. 3C58 has not been observed with the SWS. Perhaps it is in this wavelength range that 3C58 is cooling down, without looking we will not know the answer to this puzzle for a longtime! VISIBILITY: 3C 58 2h 05m 34.4s 64d 49' 49.8" 784 08 Jan 98 -- 852 16 Mar 98