G321.9−0.3 ADS: search fulltext or title/keyword/abstract

• Right Ascension: 15 20 40
• Declination: −57 34
• Size (/arcmin): 31×23
• Type: S
• Flux density at 1 GHz (/Jy): 13
• Spectral Index: 0.3

Radio: Shell brighter to the W, with Cir X-1 to N.

Point sources: Pulsar near E edge.

Distance: Optical extinction suggests 5.5 kpc.

References:

• Clark et al. 1975, AuJPA, 37, 1. Molonglo at 408 MHz (3': S=18.3 Jy) and Parkes 64-m at 5 GHz (4': S=7.8 Jy). ADS
• Kesteven & Caswell 1987, A&A, 183, 118. MOST at 843 MHz (44''×52''). ADS
• Stewart et al. 1993, MNRAS, 261, 593. ATCA at 1.5 GHz (21''). ADS
• Whiteoak & Green 1996, A&AS, 118, 329. MOST at 843 MHz (43''×51'': S>8.3). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Mignani et al. 2002, A&A, 386, 487. HST proper motion study of Cir X-1. ADS
• Tudose et al. 2006, MNRAS, 372, 417. MOST at 843 MHz. ADS
• Pletsch et al. 2013, ApJ, 779, L11. Pulsar detection. ADS
• Acero et al. 2016, ApJS, 224, 8. Fermi observations. ADS
• Wang et al. 2020, A&A, 639, A72. Optical extinction for distance. ADS

Last updated: 14 Dec 2022

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