LBV 2016blu in NGC 4559

This page is devoted to information on Supernova PSNJ12355230+2755559 in NGC 4559.   Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page.   Information on the original web pages for many of these images can be found on the links web page.

image Discovered by Lick Observatory Supernova Search (USA).   This one is a Type LBV in an HII region of NGC 4559 (z=0.003) called NGC 4559C (= IC 3550).   It has been discovered several times at this point first as PSN J12355230+2755559 by LOSS, soon after which it was confirmed as an LBV.   A second outburst was found as PSN J12355216+2755560, discovered on 2014/02/25.723 by K. Iagaki.   A third time as PSN J12355235+2755563, discovered 2014/06/22.890 by Giancarlo Cortini.   Now as AT2016blu on 2016/04/05.940 by Ron Arbour.   Next as TCP J12355227+2755555 discovered 2017/04/18.6524 by K. Itagaki.   TCP J12355227+2755556 discovered 2017/08/01.5050 by K. Itagaki.   TCP J12355223+2755557 discovered 2019/01/15.834 by K. Itagaki.   TCP J12355231+2755560 discovered 2021/04/21.0071 by ISS.   TCP J12355224+2755557 discovered 2022/01/01.7332.   TCP J12355220+2755560 discovered 2022/04/22.536 by K. Itagaki.   We have a Photometry reference image made by Odd Trondal.   So, which name do I use? I picked the shortest one 2016blu, even though it will live in the supernova 2012 archive.   This supernova is in the Constellation Coma Berenices.

The following is a list of images of this SN, in chronological order. Click on the name in the "Image Credit" column to see the image. Times and dates are in UT unless otherwise noted. If you know of any others, please tell me!

Image CreditDateMagFilterComments
LOSS 2012/01/11.25016.7CDiscovery
Joseph Brimacombe 2012/01/13.44917.7L
Leonid Elenin 2012/01/13.479
Simone Leonini undated
Mantero Andrea 2012/01/14.000
Joseph Brimacombe 2012/01/14.52918.6L
Giancarlo Cortini 2012/01/15.10
Koichi Itagaki 2014/02/15.72217.0UDiscovery
S. Leonini 2014/02/24.10216.8C
Simone Leonini 2014/02/24.10216.8C
Giancarlo Cortini 2014/02/24.890
Joseph Brimacombe 2014/02/27.32717.3C
Joseph Brimacombe 2014/03/01.32617.6C
Joseph Brimacombe 2014/03/05.46318.2C
Rafael Benavides 2014/03/07.076
Xavier Bros 2014/03/07.979
Giancarlo Cortini 2014/06/22.8917.0CDiscovery
Joseph Brimacombe 2014/06/23.29616.9C
Ron Arbour 2016/04/05.94017.1UDiscovery
Joseph Brimacombe 2016/04/07.30418.6C
Enrico Prosperi 2016/04/18.81318.8CR
Giancarlo Cortini 2017/02/26.87818.5V
Enrico Prosperi 2017/04/13.86719.0CR
K. Itagaki 2017/04/18.65216.9CDiscovery
Ron Arbour 2017/04/18.881C inverted
Jordi Camarasa 2017/04/20.00017.4C
Andre Mantero 2017/04/20.89816.5V
S. Leonini, M. Conti, P. Rosi, L.M. Tinjaca Ramirez 2017/04/20.99516.8CR
G. Wells and D. Bamberger 2017/04/21.01116.8CV
Robert Spellman 2017/04/21.165C
Adolfo San Segundo 2017/05/01.95517.0CR
Ron Arbour 2017/05/14.89017.2VDiscovery Compared
K. Itagaki 2017/08/01.50516.8UTCP J12355227+2755556
Giancarlo Cortini 2018/02/09.98017.5C
Giancarlo Cortini 2018/04/07.89019.0C
Ron Arbour 2018/07/07.98217.0V
Rafael G. Farfán 2018/07/09.000C
Giancarlo Cortini 2019/01/12.11017.3C
K. Itagaki 2019/01/15.83416.8UTCP J12355223+2755557
G. Wells and D. Bamberger 2019/02/03.06217.8CV
Giancarlo Cortini 2019/02/27.92017.5C
K. Itagaki 2019/06/01.546316.7UTCP J12355223+2755559
Simone Leonini 2019/06/03.87816.4CR
K. Itagaki 2020/01/17.682717.1U mirrorTCP J12355225+2755554
Paolo Campaner 2020/01/23.12618.7C
Odd Trondal 2020/02/03.000C
K. Itagaki 2020/02/18.65616.9UTCP J12355218+2755559
Giancarlo Cortini 2020/05/07.99018.5C
Anil Ketkar 2020/05/19.000C
Giancarlo Cortini 2020/05/24.89016.8C
Giancarlo Cortini 2020/05/27.89019.0C
K. Itagaki 2020/11/17.82716.9UTCP J12355223+2755560
K. Itagaki 2021/03/07.63916.8UTCP J12355222+2755559
Giancarlo Cortini 2021/03/07.92017.0C
Giancarlo Cortini 2021/03/16.93017.5C
Giancarlo Cortini 2021/04/20.88016.9C
Simone Leonini 2021/04/21.01015.9R TCP J12355231+2755560 mirror
Ron Arbour 2021/04/24.745C
Giancarlo Cortini 2021/06/03.92018.5C
Giancarlo Cortini 2021/12/12.0617.0C
Giancarlo Cortini 2022/02/10.99018.0C
Giancarlo Cortini 2022/04/02.90017.8C
K. Itagaki 2022/04/22.53616.7UTCP J12355220+2755560
Grzegorz Duszanowicz 2022/05/17.73916.3G
Grzegorz Duszanowicz 2022/05/26.93115.9V
Rafa Ferrando 2022/05/27.86916.6G
Juan José Godoy Carrera 2022/05/28.041C
Rafael Benavides 2022/05/28.93617.11G

Light curves and Spectra:

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David Bishop