A ROSAT-detected, New Galactic Supernova Remnant in Sagittarius, G13.3-1.3

Details A ROSAT-detected, New Galactic Supernova Remnant in Sagittarius, G13.3-1.3 A ROSAT-detected, New Galactic Supernova Remnant in Sagittarius, G13.3-1.3

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...449..681s&link_type=abstract

Astrophysical Journal v.449, p.681

Astronomy and Astrophysics

Astronomy

15

Ism: Supernova Remnants, Ism: Individual Alphanumeric: G13.3-1.3, X-Rays: Ism

Scientific paper

Faint and diffuse soft X-ray emission, coincident with [S II] strong optical filaments, probably marks a previously unrecognized supernova remnant (SNR) in Sagittarius (1 = 13.3, b = -1.3). ROSAT PSPC data show soft X-rays from an area 40' × 70' with a flux of 1.3 × 10-11 erg cm-2 s-1 between 0.1-2.4 keV. Optical interference-filter images taken of the region reveal a 20' long complex of relatively bright filaments located along the south central boundary of the X-ray region which may be associated with a ridge of faint 11 cm continuum emission. Optical spectra of these filaments show strong [S II] λλ6716, 6731 emission ([S II]/ Hα = 0.85) and [O I] λλ6300, 6364 characteristic of shocked interstellar gas found in SNRs. Both X-rays and optical emissions along the source's NE extent show strong absorption by the dust regions Lynds 332, 336, and 342, indicating a location behind these nebulae. CO emission from this region has been mapped and a kinematic distance derived for absorbing material. The remnant is shown to lie between two absorbing regions located at distances of 2 and 4 kpc.

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