Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J12355216+2755560

PSN J12355216+2755560   2014 02 25.7226*  12 35 52.16 +27 55 56.0  17.0 U   74W 100S  N4559     I 0

2014 02 25.722

Image = http://k-itagaki.jp/images/4559.jpg

2014 02 25.723

Discovered by K. Itagaki, Yamagata, Japan on an unfiltered CCD frame using 0.50-m reflector remotely at the Takanezawa station, Tochigi-ken, under the limiting magnitude= 18.5. Nothing is visible at this location on his past frames including the most recent frame (limit mag.= 17.5) taken on 2014 February 22.629 UT using the same telescope and verifying was done on a frame (limit mag.= 19.5) taken on 2007 February 24.683 UT using 0.60-m reflector at Yamagata.

2012 01 11.54

Looking at the discovery image, this appears to be the same object as PSN J12355230+2755559 an LBV found 2 years ago by LOSS. This may be a new outburst. http://www.cbat.eps.harvard.edu/unconf/followups/J12355230+2755559.html

2014 02 24.1017

Simone Leonini, Siena, Italy, report the pre-discovery by S. Leonini, M. Conti, G. Guerrini, P. Rosi and L.M. Tinjaca Ramirez of the LBV outburst in NGC4559 (mag. about +16.82+/-0.20 – USNO B1 catalogue) on unfiltered CCD image taken on 2014 February 24.10166 UT at the Montarrenti Observatory in the course of an automatic survey of the Italian Supernovae Search Project. Telescope/Detector: RC 0.53m f/8.7 + U47. Astrometry: R.A. 12h35m52.31s +/-0.12, Decl. +27degrees55arcmin55.7arcsec +/-0.16. Image link: http://www.astrofilisenesi.it/public/Sne/Uploads/psn_NGC4559.jpg

2014 03 01.326

Follow-up This possible luminous blue variable in NGC 4559 was detected with 4 x 10 min images using a clear filter Photometry: Mag 17.63 +/- 0.35 C (V for ref) Astrometry: RA 12 35 52.20 Dec +27 55 56.7 These data were collected remotely by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/12892659015/

2014 03 05.463

Follow-up This possible luminous blue variable in NGC 4559 was detected with 3 x 10 min images using a clear filter Photometry: Mag 18.19 +/- 0.49 C (V for ref) Astrometry: RA 12 35 52.34 Dec +27 55 55.5 These data were collected remotely by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/12970429344/

2014 03 11.181

Follow-up This possible luminous blue variable in NGC 4559 was detected with 6 x 10 min images using a clear filter Photometry: Mag 18.61 +/- 0.49 C (V for ref) Astrometry: RA 12 35 52.30 Dec +27 55 56.0 These data were collected remotely by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/13166160124/