Nova in Scorpius: N Sco 2024 No. 3 = V1725 Sco (TCP J17064645-3528079)
Abstract:
A nova in Scorpius, N Sco 2024 No. 3 = V1725 Sco, was discovered independently by Koichi Itagaki (Yamagata, Japan) on 2024 Sep. 09.436 UT at unfiltered CCD mag 11.4 , and by Andrew Pearce (Nedlands, W. Australia) on 2024 Sep. 04.474 UT at unfiltered CCD mag 11.3; Pearce submitted these and additional observations made Sep. 09. 579 UT to CBAT on Sep. 09. Assigned the name TCP J17064645-3528079 when posted by Itagaki on the CBAT Transient Objects Confirmation Page (http://www.cbat.eps.harvard.edu/unconf/followups/J17064645-3528079.html). Confirmed spectroscopically as a classical nova by Y. Tampo (SAAO, Univ. Cape Town) on 2024 Sep. 09.764 UT (ATel #16808, https://www.astronomerstelegram.org/?read=16808). Possible progenitor candidates identified by Sebastian Otero (see note in VSX entry for V1725 Sco (https://www.aavso.org/vsx/index.php?view=detail.top&oid=2390119)). Permanent GCVS name V1725 Sco assigned per E. Kazarovets. Some information here is from CBET 5444 (D. W. E. Green, Ed.).
Justification:
Most recent observations submitted to the AAVSO show the nova at mag 10.158 V +/-0.032 on Sep. 10.73008 UT (Pearce) and visual mag 10.1 on Sep. 11.48403 UT (Pearce). View observations submitted to the AAVSO via the AAVSO Light Curve Generator (https://www.aavso.org/LCGv2/index.htm?DateFormat=Julian&RequestedBands=&view=api.delim&ident=n sco 2024 no. 3&fromjd=2459834&tojd=2460564.294&delimiter=@@@). V1725 Sco coordinates (2000): RA 17 06 46.54 Dec -35 28 06.8. For additional details, see its entry in VSX (URL above). Submit observations to the AAVSO International Database via WebObs (https://aps.aavso.org/webobs); use the name V1725 SCO. Finder charts with comparison stars for V1725 Sco may be created using the AAVSO Variable Star Plotter (https://apps.aavso/org/vsp). Report observations to the AAVSO International Database as V1725 SCO using WebObs (https://apps.aavso.org/webobs).
Requested Data Types:
Spectroscopy, Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| N Sco 2024 No. 3 | 10.60 | N |
Cadence: Custom Precision: 100 |
Cadence: Custom Resolution: 250 Desired SNR: 100 |
Spectroscopy Lines:
He II (4686.0 Å), H-beta (4861.0 Å), H-alpha (6563.0 Å)
Photometry Filters:
B (Johnson), V (Johnson), R (Cousins), I (Cousins), Other (Please Specify)
Comparison Stars:
Finder charts with comparison stars are available via the AAVSO Variable Star Plotter (VSP, https://apps.aavso.org/vsp/).
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
CCD/CMOS/DSLR observations in all bands are requested, as are visual observations. Depending on how bright the nova becomes, PEP may also be appropriate. Cadence for photometry and spectroscopy: several times/night in early stages of nova evolution, then reducing to nightly, then ~weekly. For spectrosopy lines, also include the Bowen blend (4640A). Following this nova for at least the next two years as it declines can provide valuable data for long-term studies of novae. Be careful not to saturate images (particularly if the nova becomes sufficiently bright) and stack images as necessary to reduce scintillation.
Additional Submission Location:
None requested.
Notes:
No public notes