Supernova SN 2014K in PGC 24869 (= PSN J08510815+7150339): image and spectroscopy (25 Jan. 2014)

Supernova SN 2014K in PGC 24869: 25 Jan. 2014

Supernova SN 2014K in PGC 24869: 25 Jan. 2014

NB: the object received its official desigation SN 2014K and our photometry and spectroscopic identification is reported on the CBET 3794 from the Central Bureau for Astronomical Telegrams. Here it is an extract from CBET 3794: “Additional CCD magnitudes for 2014K:  Jan. 25.741, 16.2 (Gianluca Masi, Francesca Nocentini, and Patrick Schmeer; remotely using a 43-cm telescope near Ceccano, Italy; position end figures 08s.24, 33″.3) […].  Masi et al. add that low-resolution spectra obtained on Jan. 25.826 with a 36-cm telescope  (+ 100lines/mm grating; dispersion 3.47 nm/pixel) show clear Si II absorption around 615 nm, suggesting it to be a type-Ia supernova.”

 

On 25 Jan. 2014, the Virtual Telescope imaged the supernova candidate  PSN J08510815+7150339 in PGC 24869 galaxy. Optical remote imaging with the PlaneWave 17″ robotic unit easily located the transient, found at mag. 16.2 R.

We also did spectroscopy, to understand if this one was a true supernova and, if yes, of what type. For this, we used the Celestron C14 robotic unit, equipped with a 100 lines/mm diffraction grating. After averaging six, 300-seconds spectra, we firmly detected the evidence of  absorption at about 6150 angstroms, that is Si II. This is the clear signature of a type Ia supernova. Spectrum is shown below.

Supernova SN 2014K in PGC 24869,a spectrum: 25 Jan. 2014

Supernova SN 2014K in PGC 24869,a spectrum: 25 Jan. 2014

 

All observations were performed by G. Masi, F. Nocentini and P. Schmeer.

 

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