Swift/UVOT observations of PSN J14595947+0154262 in NGC5806
ATel #6239; Peter J. Brown
on 16 Jun 2014; 19:46 UT
Credential Certification: Peter J. Brown (grbpeter@yahoo.com)
Subjects: Optical, Ultra-Violet, Supernovae, Transient
Following its posting to the Transient Object Confirmation Page (TOCP), PSN J14595947+0154262 was observed by Swift/UVOT on 2014-06-08.86 UT. No source was detected to the following 3 sigma upper limits: uvw2 > 20.3 , uvm2 > 18.8, uvw1 > 19.8, u > 19.6, b > 20.0, v > 18.6. After the brightening reported by Zheng et al. 2014 (ATEL#6206) Swift resumed observations every ~2 days and confirm its brightening. In the latest observation beginning 2014-05-22.98 we measure the following magnitudes: uvw2: 19.03 +/- 0.18, uvm2: 19.25 +/- 0.19, uvw1: 18.42 +/- 0.15, u: 16.73 +/- 0.09, b: 17.35 +/- 0.09, v: 17.28 +/- 0.13. These magnitudes are on the Swift/UVOT photometric system (Poole et al. 2008,Breeveld et al. 2011). The measurements assume the possible supernova flux was negligible during 2013 from which images were used to subtract the galaxy flux. Using a redshift of z=0.004533 (Falco et al. 1999), a Hubble constant of H_0=73 km/s/Mpc (Freedman & Madore 2010), and correcting for local velocity flows (Mould et al. 2000), the NASA Extragalactic Database calculates a distance modulus of 31.89. Thus the current absolute magnitude is M_V= -14.61. The UV-optical colors are very red, as were SNe 2009ip (Margutti et al. 2014) and 2011ht (Roming et al. 2012) at the beginning of their major outbursts. We plan to continue observing this object with Swift/UVOT over the next few weeks to see if it continues to become brighter and bluer as well.
Swift Supernovae
