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Bright transient in Lupus

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weo
weo's picture
Bright transient in Lupus

A bright (magnitude 11.9 unfiltered) transient has been discovered and confirmed in Lupus (Dec. -44) on the fringes of a spiral galaxy. Additional observations are encouraged and spectroscopic confirmation is urgently needed to determine the nature of the object. Details are in AAVSO Special Notice #337.

Good observing  -  Elizabeth Waagen, AAVSO HQ

Andrew Pearce
Andrew Pearce's picture
Transient in NGC 5643

Hi All

Until such time as there is a chart with comparsion star magnitudes in the field, I note that the LPV RT Lup is quite close by and I used this sequence when making a magnitude estimate this morning.  I won't detail my observation here but note that it is brighter than the discovery magnitude announced.

Regards

Andrew Pearce

hambsch
hambsch's picture
Transient close to NGC5643

Hi,

I also observed this object last night remotely from Chile and found its magnitude about 11.78 in V band.

Comp stars used based on AAVSO sequence and data submitted to the AAVSO database.

 

Regards,

 

Josch

malclocke
Spectroscopically confirmed

Spectroscopically confirmed as a type Ia supernova http://www.astronomerstelegram.org/?read=4817

weo
weo's picture
Bright transient near NGC 5643 is Type-Ia supernova

The bright transient near the galaxy NGC 5643 (Lupus) reported in AAVSO Special Notice #337  has been confirmed as a Type-Ia supernova discovered before maximum light, according to Atel #4817. It was assigned the provisional name PSN J14323388-4413278 on the Central Buereau for Astronomical Telegrams Transient Objects Confirmation Page (see http://www.cbat.eps.harvard.edu/unconf/tocp.html for details). Report observations to the AAVSO International Database and the CBAT TOCP using the name PSN J14323388-4413278.

Good observing  -  Elizabeth Waagen AAVSO HQ

edited to correct spelling error

 

FRF
FRF's picture
SN 2013aa = PSN J14323388-4413278

According to CBET 3416 the official name of this supernova: SN 2013aa

weo
weo's picture
SN 2013aa = bright transient in Lupus

The bright transient in Lupus (in NGC 5643) is confirmed as a Type-Ia supernova discovered before maximum light. See AAVSO Alert Notice 479 for details. It has been named SN 2013aa (= PSN J14323388-4413278) and as of 2013 February 17 it is still 11th magnitude.

Good observing  -  Elizabeth Waagen, AAVSO HQ

weo
weo's picture
SN 2013aa = bright transient in Lupus

The bright transient in Lupus (in NGC 5643) is confirmed as a Type-Ia supernova discovered before maximum light. See AAVSO Alert Notice 479 for details. It has been named SN 2013aa (= PSN J14323388-4413278) and as of 2013 February 17 it is still 11th magnitude.

Good observing  -  Elizabeth Waagen, AAVSO HQ

TYS
TYS's picture
SN 2013AA

Unfortunetly too low for me. Rich

BLD
BLD's picture
Chart for SN2013aa

The star labled 11.8 appears to be sinificantly brighter than 11.8 and could be the reason for the scatter in the visual estimates. Has anyone else found this?

Dave

Sebastian Otero
Sebastian Otero's picture
Updated sequence for SN 2013aa

Dave, you were right, the 118 was actually V= 11.64.

So the sequence has been updated. It had two stars (112 and 118) with Tycho-2 values.
11.2 was also wrong, it was V= 11.08.
114 and 120 comp stars were added too.

The 117 had a close companion and became redundant so it was deleted from the sequence.

Update your charts and if you used the 118 comp stars for CCDV photometry, re-reduce your values using the updated magnitudes from APASS.

Best wishes,
Sebastian

hambsch
hambsch's picture
Updated sequence

Hi Sebastian,

 

I have updated my star database with the new sequence and remove my earlier postings.

I had used one star rom the seqeunce which has been removed.

All data so far acquired have been re-submitted to the AAVSO database.

Regards,

Josch

TCB168
TCB168's picture
SN 2013aa

Dear All

I took a spectra of this new star and confirmed that it is a type 1a SN near maximum. Unfortunately I was beaten to it by the pros though. :->

see  http://users.northnet.com.au/~bohlsen/Nova/sn_2013aa.htm

Cheers

Terry

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