Newλ6 cm andλ11 cm observations of the supernova remnant CTA 1

Optical CCD imaging of the supernova remnant CTA 1

Deep Hα + [NII], [NII], [SII] and [OIII] CCD images have been obtained from the high galactic latitude supernova remnant CTA 1. The filamentary morphology in the light of the [OIII] emission is now clearly seen in the full field of the remnant. Contrary to the [OIII] morphology, the remnant appears less sharply defined in the light of the Hα+[NII], [NII] and [SII]. The morphological differences...

X - ray , Radio , and Optical Observations of the Putative Pulsar in the Supernova Remnant CTA 1

A Chandra image of the central X-ray source RX J0007.0+7303 in the supernova remnant CTA 1 reveals a point source, a compact nebula, and a bent jet, all of which are characteristic of energetic, rotation-powered pulsars. Using the MDM 2.4m telescope we obtain upper limits in the optical at the position of the point source, (J2000) 00 h 07 m 01. these correspond to an X-ray-to-optical flux ratio...

A “missing” Supernova Remnant Revealed by the 21-cm Line of Atomic Hydrogen

Although some 20–30,000 supernova remnants (SNRs) are expected to exist in the Milky Way, only about 230 are presently known. This implies that most SNRs are “missing”. Recently, we proposed that small ( < ∼ 1 ), faint, high-velocity features seen in large-scale 21-cm line surveys of atomic hydrogen (Hi) in the Galactic plane could be examples of such missing old SNRs. Here we report on high-re...

Final Report: ECE 892(851) The CM-1, CM-2, and CM-5: A Comparative Study

ROTATIONAL ASSIGNMENT OF NEW BANDS IN THE NO , EXCITATION SPECTRUM IN THE SPECTRAL RANGE OF 15600 cm TO 15633 cm

Sub-Doppler excitation spectroscopy in a collimated cold supersonic beam of 5% NO seeded in argon has been performed with a spectral resolution down to 10 MHz for four vibronic bands within the perturbed B ?X A system of NO . The rotational temperature of about 15 K achieved by adiabatic cooling allows the separation of closely lying vibronic bands which overlap in absorption spectra ...