Bright probable nova in Sco - spectroscopic confirmation needed

American Association of Variable Star Observers (AAVSO)
Fri, 04/21/2023 - 16:07

A bright probable nova in Sco has been discovered by Andrew Pearce (Nedlands, W. Australia) as reported to the IAU CBAT Transient Object Confirmation Page (TOCP):

PNV J17224490-4137160   2023 04 20.6780  17 22 44.90 -41 37 16.0   8.0 Unfiltered  (coords 2000)

The most recent observations from Pearce show the object continuing to brighten and at V = 7.32 on Apr. 20.855 UT.  Even more recently N. Justino (São Vicente, Brazil) reported it at visual magnitude 7.0 on Apr. 21.20139 UT.

The object has been confirmed by several observers. However, spectroscopic confirmation is needed urgently.

Please report your findings as soon as possible.

Many thanks, and good observing,

Elizabeth Waagen, AAVSO HQ

American Association of Variable Star Observers (AAVSO)
Nova in Sco - PNV J17224490-4137160 - Alert Notice 821

Alert Notice 821 reports on and announces an observing campaign for a bright nova in Sco - PNV J17224490-4137160. Please see the notice for details and observing instructions.

There are threads on this object under the following forums:

- Time Sensitive Alerts:
- Novae:
- Spectroscopy:

Please subscribe to these threads if you are observing this nova and/or participating in the campaign so you can be updated by the astronomer and by HQ. Join in the discussion or ask questions there!

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

American Association of Variable Star Observers (AAVSO)
I just captured it using…

I just captured it using iTel T32 at SSO with V and I filters. The V magnitude is close to mag. 7.5. I used APASS for comparison stars, as I couldn't get much sense from the chart in the AAVSO alert.

American Association of Variable Star Observers (AAVSO)
PNV J17224490-4137160 = Nova Sco 2023 = V1716 Sco

CBET 5245 (Daniel W. E. Green, Ed.) reports that PNV J17224490-4137160 has been confirmed spectroscopically as a nova and that E. Kazarovets informs him that the nova has been assigned the permanent GCVS designation V1716 Sco.

Good observing,

Elizabeth O. Waagen, AAVSO HQ

Association of Variable Star Observers - Pleione (Russia) (AVSOPLEIONE)
ATel reporting NuSTAR and AAVSO results

Thank you everyone who is following Nova Scorpii 2023!

I've summarized the initial results of the simultaneous NuSTAR and AAVSO observations in ATel #16018 The nova is showing a smooth optical decline over the course of the day-long NuSTAR exposure. There seem to be low-amplitude deviations from the linear decline, but I'm not sure at this point if they are real. Overall, the lightcurve is noticeably different from that of V1674 Her - the previous nova simultaneously observed by NuSTAR and from the ground - which showed prominent irregular variations (see Figure 2 in ), but was observed at a later stage of an eruption, not right after the peak. I plan a more detailed analysis of multiwavelength data on Nova Sco that hopefully will result in a paper.