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Speca

Speca (R.A. 14h09m48.856s, Dec. -03d02m32.56s (J 2000.0)), discovered in 2011 was the first spiral-host episodic radio galaxy. Although the first disk- or spiral-host large (100-300 kpc) radio galaxy (0313-192 ) was discovered in 1998, there was some doubt if it is just a rare positional coincidence between the large double lobed radio source and small optical galaxy at its geometrical centre. Speca, having well-defined edge-brightened inner pair of radio lobes along with a pair of diffuse relic lobes, became the first confirmed case for a spiral/disk galaxy to launch a large 100 kpc to Mpc-scale radio jets and lobes. The GMRT and VLA radio telescopes were used to discover this unique source prompting their press releases on the publication in the MNRAS Letters. Given wide publicity in the news, astronomers took the case seriously and the subsequent discoveries of spiral-host radio galaxies, later known as Spiral DRAGN , did not have to wait for ten years. Nearly 17 Spiral DRAGNs are know by now and the list can be seen growing here "List of spiral DRAGNs".

The discovery team led by Dr. Ananda Hota named it Speca for its nature Spiral-host Episodic radio galaxy tracing Cluster Accretion (SPECA).