Note: this is an archived version which has been superseded. The current SNR catalogue is at https://www.mrao.cam.ac.uk/surveys/snrs/

G21.0−0.4 ADS: search fulltext or title/keyword/abstract

• Right Ascension: 18 31 12
• Declination: −10 47
• Size (/arcmin): 9×7
• Type: S
• Flux density at 1 GHz (/Jy): 1.1
• Spectral Index: 0.6

Notes: Has been called G21.04−0.47.

Radio: Shell.

References:

• Brogan et al. 2006, ApJ, 639, L25. VLA at 330 MHz (42'': S=2.3±0.2 Jy), plus other observations. ADS
• Dokara et al. 2021, A&A, 651, A86. VLA at 4 to 8 GHz (18'': S=0.05 Jy) including polarisation, and Spitzer observations. ADS

Last updated: 20 Dec 2022

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