G65.7+1.2     DA 495

• Right Ascension: 19 52 10
• Declination: +29 26
• Size (/arcmin): 22
• Type: F
• Flux density at 1 GHz (/Jy): 5.1
• Spectral Index: varies

Notes: Has mistakenly been called G55.7+1.2.

Radio: Centrally brightened with thick shell?

X-ray: Detected.

Point sources: Compact X-ray source near centre.

Distance: HI polarisation observations suggest 1.5 kpc.

References:

• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=2.8±0.4 Jy), and 37-m at 1.7 GHz (S=4.4±0.5 Jy), plus review of flux densities. ADS
   also see: Willis 1973, A&A, 27, 483. Erratum. ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_430 MHz=8.7±4.9 Jy, S_318 MHz=9.7±2.2 Jy. ADS
• Landecker & Caswell 1983, AJ, 88, 1810. DRAO at 1.4 GHz (0'.9×1'.5: S=4.4±0.2 Jy). ADS
• Velusamy et al. 1989, JApA, 10, 161. Ooty at 327 MHz (36''×64''), WSRT at 610 MHz (62'') and VLA at 1.4 GHz (36'' and 12''), including IRAS imaging. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
• Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS
• Kothes et al. 2004, ApJ, 607, 855. HI polarisation absorption. ADS
• Arzoumanian et al. 2004, ApJ, 610, L101. ROSAT and ASCA observations of compact source. ADS
• Kothes et al. 2006, A&A, 457, 1081. CGPS at 408 MHz (~3': S=6.5±0.6 Jy) and 1420 MHz (~1': S=4.0±0.2 Jy), including polarisation and review of flux densities. ADS
• Arzoumanian et al. 2008, ApJ, 687, 505. Chandra observations. ADS
• Kothes et al. 2008, ApJ, 687, 516. CGPS at 408 MHz (2'.9×6'.0: S=6.5±0.5 Jy) and 1.4 GHz (0'.82×1'.75: S=4.0±0.2 Jy), Effelsberg 100-m at 4.85 GHz (2'.45: S=1.6±0.1 Jy) and 10.55 GHz (smoothed to 2'.45: S=1.1±0.1 Jy), plus review of flux densities. ADS
• Sun et al. 2011, A&A, 536, A83. Urumqi 25-m at 5 GHz (9'.5: S=1.95±0.10 Jy) including polarisation and review of flux densities. ADS

Last updated: 28 Apr 2014