spectro-aras.com

-----Original Message-----
From: Naoto Kojiguchi <kojiguchi@kusastro.kyoto-u.ac.jp>
Sent: 22 May 2022 00:58
To: vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp; vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp; vsnet-newvar@ooruri.kusastro.kyoto-u.ac.jp
Subject: [vsnet-alert 26782] PNV J05222788-6936333

PNV J05222788-6936333

PNV J05222788-6936333 2022 05 21.8916* 05 22 27.88 -69 36 33.3 12.5 U Dor 9 0

2022 05 21.8916
Discovered by C. Jacques, C. Colesanti, C. Barreto, E. Pimentel, J. Ribeiro, M. Domingues, J. Amancio, L. Amaral, P. Holvorcem, T. Napoleao on behalf of the Brazilian Transient Search - BraTS - at SONEAR Observatory, Oliveira, Brazil in three frames with 20 seconds exposure using an astrograph 280mm f/2.2 + CCD unfiltered, with magnitude 12.5 under limiting mag = 17.8. Nothing is visible at this location on the previous frames (limiting mag = 17.8) taken on 2022 01 15.28 UT. Possible Nova in LMC.

IDs:
052227.803 -693633.241 Gaia_DR2_4657985010083189504 Plx=-1.4544(0.504) dismod=-- pmRA=0.548(0.87) pmDE=-7.839(1.016) G=18.882(0.0077) BP-RP=0.6908 E(g-r)=-- E(B-V)=-- Ag=-- Ar=-- Ai=--
052227.794 -693633.230 Gaia_EDR3_4657985010083189504 Plx=-0.0025(0.441) dismod=-- PM=3.36 pmRA=3.262(0.602) pmDE=-0.804(0.583) G=18.912672(0.008123) BP-RP=0.821734 E(g-r)=-- E(B-V)=-- Ag=-- Ar=-- Ai=--

ASASSN Sky Patrol (contaminated):
https://asas-sn.osu.edu/sky-patrol/coor ... 5f49f856b3
https://asas-sn.osu.edu/sky-patrol/coor ... c28ff6166d (Image Subtraction Photometry (Reference flux added))

PNVJ05222788-6936333 20220115.28 <17.8C (BraTS)
PNVJ05222788-6936333 20220430.015 <158g ASN
PNVJ05222788-6936333 20220501.720 118g ASN
PNVJ05222788-6936333 20220502.731 105g ASN
PNVJ05222788-6936333 20220503.008 104g ASN
PNVJ05222788-6936333 20220504.733 101g ASN
PNVJ05222788-6936333 20220505.001 105g ASN
PNVJ05222788-6936333 20220506.954 105g ASN
PNVJ05222788-6936333 20220508.735 107g ASN
PNVJ05222788-6936333 20220509.981 111g ASN
PNVJ05222788-6936333 20220510.984 111g ASN
PNVJ05222788-6936333 20220511.703 111g ASN
PNVJ05222788-6936333 20220512.974 114g ASN
PNVJ05222788-6936333 20220513.733 115g ASN
PNVJ05222788-6936333 20220514.972 115g ASN
PNVJ05222788-6936333 20220515.694 117g ASN
PNVJ05222788-6936333 20220516.709 118g ASN
PNVJ05222788-6936333 20220517.708 119g ASN
PNVJ05222788-6936333 20220518.956 121g ASN
PNVJ05222788-6936333 20220519.951 122g ASN
PNVJ05222788-6936333 20220521.696 123g ASN
PNVJ05222788-6936333 20220521.8916 12.5C (BraTS)

Also on TNS as AT2022khw
https://www.wis-tns.org/object/2022khw

Hi! I am Tasso Napoleao from Brazil and I belong to the BRATS (Brazilian Transient Search) Team which found PNV J05222788-6936333 a couple of days ago. This is our third classical nova we discovered in the LMC (previous ones were LMCN 2019-07a and LMCN 2019-11a).

We are already running BVR photometry of this nova (currently V = 12.7) but are unfortunately unable to do spectra in our group. Although we have one fellow here with adequate equipment, he lives in Brasilia which is at latitude 15 degrees (and that is too high to catch the LMC in May). I have already written to the 2SPOT team to check if they would be interested in performing a spectrum of this one, but maybe other fellows in Australia, New Zealand ou South Africa would like to try also. That would be highly welcome.

Cheers from Brazil!

Tasso.

Bad weather at this time in Chile, but we will try next night....

Kia ora koutou, as they say in these parts. I managed to get a shot of this object this evening from New Zealand. 120 min in 4x30min exposures, although some occulting from the observatory walls in the last exposure.

And here is the fits file. The response star was HD42525.

#Curses. FIT file not allowed on the forum. Let me know contact details, and I'll send you the fits spectrum.

Tom Love wrote:
#Curses. FIT file not allowed on the forum.

zip it or change the extension eg to .txt ?

Looks like a nova to me. You could formally classify it on TNS
https://www.wis-tns.org/object/2022khw

and on TOCP
http://www.cbat.eps.harvard.edu/unconf/ ... 36333.html

Robin

It can also be uploaded to the BAA spectroscopy database
https://britastro.org/specdb/

Cheers
Robin

Robin Leadbeater wrote:

Tom Love wrote:
#Curses. FIT file not allowed on the forum.

zip it or change the extension eg to .txt ?

Looks like a nova to me. You could formally classify it on TNS
https://www.wis-tns.org/object/2022khw

and on TOCP
http://www.cbat.eps.harvard.edu/unconf/ ... 36333.html

Robin

*****************************

Yes, Robin, it has been confirmed as a nova by the SOAR staff (pls see https://www.astronomerstelegram.org/?read=15392)

Tasso

Tom Love wrote:Kia ora koutou, as they say in these parts. I managed to get a shot of this object this evening from New Zealand. 120 min in 4x30min exposures, although some occulting from the observatory walls in the last exposure.

*************************

This is great, Tom, thanks! Excellent spectrum!

It looks clearly as a FeII nova. Unfortunately, we are already too far from the probable explosion data (April 30th) so I think we are heading to the nebular phase.

Tom, maybe you would like to submit your fit file in this TNS page as a classification report: https://www.wis-tns.org/object/2022khw

Cheers,

Tasso.