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Alert Notice 647: Nova in Ophiuchus - N Oph 2018 No. 3 = PNV J17422408-2053088

August 13, 2018

Event: Nova in Ophiuchus - N Oph 2018 No. 3 = PNV J17422408-2053088

Discovered by: C. Jacques, J. Barros, E. Pimentel, and P. Holvorcem, on behalf of the Brazilian Transient Search - BraTS (at SONEAR Observatory, Oliveira, Brazil); via TOCP

Discovery magnitude: unfiltered CCD magnitude 11.1 (on three frames, 10-sec exposure, using an astrograph 11" f/2.2 + CCD camera)

Discovery date: 2018 August 08.9596 UT

Coordinates (2000.0): R.A. 17 42 24.09  Decl. -20 53 08.7  (from VSX)

Spectra: Spectroscopy obtained by S. C. Williams (Lancaster) et al. on 2018 Aug 9.93 UT with the FRODOSpec spectrograph on the 2-m Liverpool Telescope indicate that the object is a Fe II-type galactic nova in the early stages of an eruption (ATel #11928).

A high resolution Echelle spectrum obtained by U. Munari et al. on 2018 Aug 10.839 UT with the Varese 84cm telescope suggests significant reddening (ATel #11940).

Observing recommendations: Observations of all types (visual, CCD, DSLR, PEP, spectroscopy) and multiple bands, particularly BVI, as instrumentation permits are strongly encouraged as the nova evolves.

Observations reported to the AAVSO:
2018 Jul. 08.991 UT, <16.0 (BRaTS patrol, reported by Jacques et al.; via TOCP);
Aug. 08.273, <16.0 V (ASAS-SN Sky Patrol, reported via P. Schmeer, Saarbrücken-Bischmisheim, Germany);
09.3589, 11.29 B (S. Kiyota, Kamagaya, Japan, remotely using 0.50-m f/4.5 CDK astrograph + FLI PL6303E CCD (T30, iTelescope.NET at Siding Spring Observatory, NSW, Australia); via TOCP);
09.3589, 10.69 V (Kiyota; via TOCP);
09.3589, 10.26 Rc (Kiyota; via TOCP);
09.3589, 10.07 Ic (Kiyota; via TOCP);
09.3882, 10.50 V -/+0.025 (R. Fidrich, Budapest, Hungary, remotely with 0.43m iTelescope.net reflector at Siding Spring, Australia);
09.46816 UT, 11.216 B +/-0.002 (A. Pearce, Nedlands, W. Australia);
09.46955, 10.443 V +/-0.002 (Pearce);
09.47047, 9.866 R +/-0.008 (Pearce);
09.47132, 9.362 I +/-0.006 (Pearce);
09.57780, 10.3 (R. Stubbings, Tetoora Road, VIC, Australia);
09.88196, 10.2 (D. Vansteelant, Varsenare, Belgium);
09.88453, 10.02 V +/-0.019 (D. Rodriguez Perez, Madrid, Spain);
09.88701, 9.380 R +/-0.031 (Rodriguez Perez);
09.90972, 10.6 (A. Amorim, Florianopolis, Brazil);
09.94653, 10.2 (R. Tyson, Freeport, NY);
09.95347, 10.3 (L. Camargo da Silva, Santa Catarina, Brazil);
10.01259, 10.985 B +/-0.005 (F.-J. Hambsch, Mol, Belgium);
10.01315, 10.976 B +/-0.005 (Hambsch);
10.01384, 10.115 V +/-0.004 (Hambsch);
10.01422, 10.134 V +/-0.004 (Hambsch);
10.01458, 9.047 I +/-0.008 (Hambsch);
10.01485, 9.027 I +/-0.010 (Hambsch);
10.018, 10.97 B (U. Munari et al., ATel #11940);
10.018, 10.11 V (Munari et al.);
10.018, 8.90 I (Munari et al.);
10.07639, 10.2 (L. Shotter, Uniontown, PA);
10.09097, 10.2 (J. O'Neill, Topsfield, MA);
10.38462, 10.436 B +/-0.017 (Pearce);
10.38596, 9.607 V +/-0.006 (Pearce);
10.38691, 9.123 R +/-0.014 (Pearce);
10.38773, 8.671 I +/-0.026 (Pearce);
10.87080, 9.78 (X. Domingo Martinez, Alpicat, Spain);
10.95069, 9.7 (Amorim);
11.014, 10.37 B (Munari et al.);
11.014, 9.45 V (Munari et al.);
11.014, 8.26 I (Munari et al.);
11.18750, 9.7 (R. Howard, Oakland, CA);
11.79514, 9.3 CR +/-0.01 (Y. Solomonov, Moscow, Russian Federation);
11.87986, 9.5 (P. Schmeer, Saarbruecken-Bischmisheim, Germany);
11.88190, 9.09 (Domingo Martinez);
11.92153, 9.1 (Amorim);
12.10556, 9.3 (C. Maloney, Helena, AR);
12.20486, 9.4 (Howard);
12.71620, 9.682 TG +/-0.010 (D. Blane, Henley-on-Klip, South Africa);
12.86250, 9.3 (Schmeer);
12.87260, 9.389 TG +/-0.010 (Blane);
12.92431, 9.0 (J. Fernandes Neto, Florianopolis, Brazil);
12.92431, 9.1 (Amorim);
12.97292, 9.3 (Camargo da Silva);
13.49931, 9.2 (Pearce);
13.74480, 8.963 TG +/-0.008 (Blane);
13.80660, 8.992 TG +/-0.008 (Blane);

Charts: Charts with a comparison star sequence for N Oph 2018 No. 3 may be created using the AAVSO Variable Star Plotter (VSP).

Submit observations: Please submit observations to the AAVSO International Database using the name N OPH 2018 NO. 3. When a GCVS name is announced in an IAU Circular or CBET, please use that name.

AAVSO Forums: N Oph 2018 No. 3 is the topic of the AAVSO Time Sensitive Alerts forum thread https://www.aavso.org/pnv-j17422408-2053088-possible-nova-111-mag-ophiuchus

and the AAVSO Novae forum thread https://www.aavso.org/pnv-j17422408-2053088-galactic-fe-ii-type-nova-103-mag-ophiuchus

Notes:
a. Designated PNV J17422408-2053088 when posted to the IAU Central Bureau for Astronomical Telegrams Transient Object Confirmation Page (TOCP). Some information in this Alert Notice is taken from the TOCP page.
 
b. P. Schmeer writes that the Pan-STARRS1 source PSO J174224.016-205308.866 (position end figures 24.013s, 08.90"; i= 20.17 mag) and the Vista variable VVV J174224.02-205307.77 are both 1" away from the reported coordinates of the transient. The amplitude of this eruption is at least 11 magnitudes. No outbursts or eruptions were detected by the ASAS-SN Sky Patrol since 2015 Feb. 16.

c. Position end figures
- S. Kiyota (2018 Aug. 09.3589 UT, via TOCP): 24.10s, 08.6"

d. Images
- S. Kiyota (2018 Aug. 09.3589 UT, via TOCP): http://meineko.sakura.ne.jp/ccd/PNV_J17422408-2053088.jpg

Congratulations to C. Jacques, J. Barros, E. Pimentel, P. Holvorcem, and the Brazilian Transient Search on this discovery!

This AAVSO Alert Notice was compiled by Elizabeth O. Waagen.
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