Note: this is an archived version which has been superseded.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

G57.2+0.8 ADS: search fulltext or title/keyword/abstract

(4C21.53)

• Right Ascension: 19 34 59
• Declination: +21 57
• Size (/arcmin): 12?
• Type: S?
• Flux density at 1 GHz (/Jy): 1.8
• Spectral Index: 0.35

Radio: Extended non-thermal arc.

Point sources: Central magnetar/SGR.

Distance: HI observations suggest 12.5 kpc, other associations suggests 4.4 to 9.0 kpc.

References:

• Sieber & Seiradakis 1984, A&A, 130, 257. Effelsberg 100-m at 1.4 GHz (8.'8: 1.34±0.1), 2.7 GHz (4.'3: 0.86±0.1), plus other surveys of the area. ADS
• Caswell et al. 1985, AJ, 90, 488. DRAO at 1.4 GHz (1'×3'). ADS
• Hurley-Walker et al. 2009, MNRAS, 396, 365. Radio observations at 14 to 18 GHz. ADS
• Sun et al. 2011, A&A, 536, A83. Urumqi 25-m at 5 GHz (9.'5: S=0.74±0.04 Jy) including polarisation and review of flux densities. ADS
• Surnis et al. 2016, ApJ, 826, 184. GMRT at 610 MHz and VLA at 1.4 GHz. ADS
• Israel et al. 2016, MNRAS, 457, 3448. Chandra, XMM-Newton and Swift observations of magnetar. ADS
• Kothes et al. 2018, ApJ, 852, 54. DRAO at 408 MHz (2.'8×8.'5) and 1.4 GHz (0.'82×2.'5), including HI and polarisation, plus other radio observations. ADS
• Zhong et al. 2020, ApJ, 898, L5. Distance from association with FRB. ADS
• Mereghetti et al. 2020, ApJ, 898, L29. INTEGRAL observations of FRB, for distance. ADS
• Zhou et al. 2020, ApJ, 905, 99. CO observations. ADS
• Dokara et al. 2021, A&A, 651, A86. VLA at 4 to 8 GHz (18'': S=0.2 Jy) including polarisation, and Spitzer observations. ADS

Last updated: 20 Dec 2022

home | documentation | detailed listings | summary listings

Dave Green / Cambridge, UK /