2011kp | Transient Name Server

RA/DEC (2000)

12:30:41.850 +41:37:49.24

187.674375 +41.630344

Type

LRN

Redshift

0.002265

Discovery Report Classification Report

Reporting Group

None

Discovering Data Source

None

Discovery Date

2011-08-16 19:55:12.000

TNS AT

Public

Host Name

NGC 4490

Host Redshift

0.00185

Discovery Mag

16.7

Filter

Clear-

Reporter/s

G. Cortini, S. Antonellini

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

Other_Other_Clear

Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)

Spectra

Select	ID	Obs-date (UT)	Tel / Inst	Exp-Time	Observer/s	Reducer/s	Group	Spectrum ascii file	Spectrum fits file	Spec. Type	Assoc. Groups	End prop. period	Remarks
	20872	2011-08-19 21:36:00	TNG / DOLORES	720	A. Harutunyan	S. Benetti	Padova-Asiago	tns_2011kp_2011-08-19.9_TNG_DOLORES_Padova-Asiago.txt		Object			The spectrum is dominated by narrow Balmer lines in emission, superimposed on a relatively blue continuum. The FWHM of the H_alpha feature -- which does not exhibit a multi-component profile -- is about 1200 km/s. The only other features apparent are most likely due to a blend of Fe II features between 510 and 550 nm, and a feature at 454 nm that is also due to Fe II. The spectrum is reminiscent of that of a supernova impostor.
Binning factor: (rounded to nearest integer >1) Mouse hovers at WL: 0 (rest), 0 (observed) ▌Show H at z=v_exp= km/s ▌Show He at z=v_exp= km/s ▌Show He II at z=v_exp= km/s ▌Show C II at z=v_exp= km/s ▌Show C III at z=v_exp= km/s ▌Show C IV at z=v_exp= km/s ▌Show N II at z=v_exp= km/s ▌Show N III at z=v_exp= km/s ▌Show N IV at z=v_exp= km/s ▌Show N V at z=v_exp= km/s ▌Show O at z=v_exp= km/s ▌Show [O I] at z=v_exp= km/s ▌Show O II at z=v_exp= km/s ▌Show [O II] at z=v_exp= km/s ▌Show [O III] at z=v_exp= km/s ▌Show O V at z=v_exp= km/s ▌Show O VI at z=v_exp= km/s ▌Show Na at z=v_exp= km/s ▌Show Mg at z=v_exp= km/s ▌Show Mg II at z=v_exp= km/s ▌Show Si II at z=v_exp= km/s ▌Show S II at z=v_exp= km/s ▌Show Ca II at z=v_exp= km/s ▌Show [Ca II] at z=v_exp= km/s ▌Show Fe II at z=v_exp= km/s ▌Show Fe III at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Tellurics ▌Show Galaxy lines at z= ▌Show WR-WN at z=v_exp= km/s ▌Show WR-WC/O at z=v_exp= km/s Remarks The spectrum is dominated by narrow Balmer lines in emission, superimposed on a relatively blue continuum. The FWHM of the H_alpha feature -- which does not exhibit a multi-component profile -- is about 1200 km/s. The only other features apparent are most likely due to a blend of Fe II features between 510 and 550 nm, and a feature at 454 nm that is also due to Fe II. The spectrum is reminiscent of that of a supernova impostor.

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

Clear-

Other_Other

2011-08-16 19:55:12 - 2011-08-16 19:55:12

2455790.33 - 2455790.33

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
482692	2011-08-16 19:55:12	2455790.33	16.7		18	VegaMag	Clear-	Other_Other		Giancarlo Cortini and Stefano Antonellini

AT Reports

ID	Time received (UT)	Sender	Reporter/s	Reporting group	Disc. Data Source	RA	DEC	Discovery date (UT)	Discovery Mag.	Filter	Related files	AT Type	Host name	Internal name	Assoc. Groups	End prop. period	Remarks	ADS Bibcode	Unreal	Auto classification
251928	2025-04-19 15:43:10	Andrea Reguitti	G. Cortini, S. Antonellini			12:30:41.850	+41:37:49.24	2011-08-16 19:55:12.000	16.7	Clear-		PSN	NGC 4490	PSN J12304185+4137498			The transient is known as NGC 4490-OT2011 (Smith et al. 2016).	2025TNSTR1438....1C	N

Classification Reports

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

20872

2025-04-20 08:45:49

Andrea Reguitti

L. Magill, R. Kotak, M. Fraser, S. Smartt (QUB), P. Ochner, A. Pastorello, S. Benetti (INAF-OAPd), A. Harutunyan (TNG)

Padova-Asiago

LRN

0.002265

Padova-Asiago

Classified as a LRN by Smith et al. 2016 and Pastorello et al. 2019.

2025TNSCR1459....1M

Spectra

ID	Obs-date (UT)	Tel / Inst	Exp-Time	Observer/s	Reducer/s	Group	Spectrum ascii file	Spectrum fits file	Spec. Type	Assoc. Groups	End prop. period	Remarks
20872	2011-08-19 21:36:00	TNG / DOLORES	720	A. Harutunyan	S. Benetti	Padova-Asiago	tns_2011kp_2011-08-19.9_TNG_DOLORES_Padova-Asiago.txt		Object			The spectrum is dominated by narrow Balmer lines in emission, superimposed on a relatively blue continuum. The FWHM of the H_alpha feature -- which does not exhibit a multi-component profile -- is about 1200 km/s. The only other features apparent are most likely due to a blend of Fe II features between 510 and 550 nm, and a feature at 454 nm that is also due to Fe II. The spectrum is reminiscent of that of a supernova impostor.

AT 2011kp

Spectra

Light curves

Comments