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MERLIN observations of SN2208ax

ATel #1469; M. K. Argo, R. J. Beswick, T. W.B. Muxlow, A. Pedlar (JBCA), J. Marcaide, I Marti-Vidal (València)
on 11 Apr 2008; 14:43 UT
Credential Certification: Megan Argo (mkargo@manchester.ac.uk)

Subjects: Radio, Supernovae

SN2008ax in NGC4490 (CBET 1280) has been detected at 5GHz using MERLIN. Observations carried out using the Knockin, Darnhall and Tabley antennas (giving a maximum baseline of 67 km) between 14-17th March 2008 at 4.994 GHz result in a point source detection with an integrated flux density of 2.0 mJy with a 3-sigma noise limit of 0.23 mJy/beam. Further 5 GHz observations with five telescopes (maximum baseline of 217 km) between 23rd and 25th March 2008 show that the source brightened to 2.7 mJy (3-sigma = 0.11 mJy/beam). Observations with six telescopes on March 28th give a 5GHz flux density of 1.64 +/- 0.17 mJy while observations on March 31st (no data from the Defford or Cambridge antennas) give a flux density of 1.60 +/- 0.22 mJy. The MERLIN source is located at R.A. = 12h30m40.s8110 Dec = 41d38'14."770 (J2000). Observations are continuing. We acknowledge the use of Director's Discretionary Time and thank the MERLIN staff for making these observations possible.