SIMBAD references

1997A&AS..123..199L - Astron. Astrophys., Suppl. Ser., 123, 199-207 (1997/June-1)

The unusual supernova remnant G76.9+1.0: The low-frequency radio spectrum.


Abstract (from CDS):

G76.9+1.0 is an unusual radio source which is interpreted as a filled-centre supernova remnant (SNR). New 232-MHz observations of a field containing G76.9+1.0 have been combined with a re-analysis of existing observational data to derive the low-frequency spectrum of the SNR. Its spectral index has a value of about 0.6 above 1GHz, and appears to flatten below that frequency. This may indicate a "break" in the spectrum below 1GHz. However, further observations at frequencies below 400MHz will be required before this can be firmly established. The low-frequency spectra of several other radio sources in the field surrounding G76.9+1.0 were also derived, partially to confirm the validity of the 232-MHz flux densities but also to provide new lower frequency data for these objects. They include several H II regions and some extragalactic sources. Two of the latter have rather steep spectra and merit further study.

Abstract Copyright:

Journal keyword(s): ISM: supernova remnants - ISM: individual objects: G76.9+1.0 (SNR 076.9+01.0) - radio continum: ISM - radio continum: general

Nomenclature: Table 4: [LZZ97] NNA (Nos 1-16, 2A-2B, 4A-4B)

Simbad objects: 20

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