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Alert Notice 516: Nova Oph 2015 = PNV J17291350-1846120 [V2944 Oph]

April 2, 2015

Event: Nova Oph 2015 = PNV J17291350-1846120  [V2944 Oph]

Discovered by: Yukio Sakurai, Ibaraki-ken, Japan

Discovery magnitude: 12.2 unfiltered, using 180-mm f/2.8 lens

Discovery date: 2015 March 29.766 UT

Coordinates:  R.A. 17 29 13.58   Dec. -18 46 11.7  (2000.0)

Spectra: A spectrum obtained by M. Fujii (Fujii Kurosaki Observatory, Kurashiki, Okayama, Japan) on 2015 Mar 30.758 UT is consistent with PNV J17291350-1846120 being a He/N type nova, and may be seen at http://otobs.org/FBO/fko/nova/pnv_j17291350-1846120_20150330.png. A spectrum by K. Ayani (Bisei Astronomical Observatory, Ibara, Okayama, Japan) on Mar. 30.8 UT confirmed Fujii's findings including N III and O I emission; it may be seen at http://tinyurl.com/kbpoyv6 (CBET 4086).

Observing recommendations: Observations of all types (visual, CCD, DSLR, spectroscopy) are strongly encouraged as this nova evolves.

Charts: Charts for Nova Oph 2015 may be created using the AAVSO Variable Star Plotter (VSP) at http://www.aavso.org/vsp.

Observations reported to the AAVSO:
2105 Mar. 27.62778 UT, 13.7 TG (KBJ, R. Kaufman, Bright, VIC, Australia);
28.777, <12.5 (T. Kojima, Gunma-ken, Japan, using 150-mm f/2.8 lens, via TOCP);
29.781, 12.5 (Kojima, via TOCP);
30.4187, 12.0 V (A. Valvasori and F. Briganti, remotely with iTelescope Newton 250mm f/3,4 and CCD ST-10ME, New Mexico MPC H06, via TOCP);
30.540, 12.26 V (KSI, S. Kiyota, Kamagaya, Japan, via TOCP);
30.540, 11.57 Ic (Kiyota, via TOCP);
30.639, 12.7 unfiltered CCD (T. Noguchi, Chiba-ken, Japan, via TOCP);
30.771, 11.9(T. Kojima, Gunma-ken, Japan, via TOCP);
31.117, 12.0 (G. Masi, remotely using a 43-cm telescope at Ceccano, Italy, CBET 4086);
31.41435, 11.947 V +/-0.005 (HMB, J. Hambsch, Mol, Belgium, remotely at San Pedro de Atacama, Chile);
31.41476, 11.931 V +/-0.008 (Hambsch);
31.41515, 10.878 I +/-0.025 (Hambsch);
31.41544, 10.872 I +/-0.010 (Hambsch);
31.57222, 11.8 TG (Kaufman);
31.78750, 11.9 (PEX, A. Pearce, Nedlands, WA, Australia);
Apr. 01.077, 12.71 B (U. Munari (Astron. Obs. Padova) and S. Dallaporta (ANS Collaboration), CBET 4086);
01.077, 11.93 V (Munari and Dallaporta, CBET 4086);
01.077, 11.38 Rc (Munari and Dallaporta, CBET 4086);
01.077, 10.89 Ic (Munari and Dallaporta, CBET 4086);
01.117, 12.69 B  (Munari and Dallaporta, CBET 4086);
01.117, 11.94 V (Munari and Dallaporta, CBET 4086);
01.117, 11.39 Rc (Munari and Dallaporta, CBET 4086);
01.117, 10.90 Ic (Munari and Dallaporta, CBET 4086);
01.13889, 11.7 (WKL, K. Wenzel, Grossostheim, Germany);
01.43730, 11.94 V +/-0.03 (OCN, S. O'Connor, St. George, Bermuda);
01.43870, 11.30 R +/-0.08 (O'Connor);
01.44010, 10.77 I +/-0.06 (O'Connor);

Submit observations: Please submit observations to the AAVSO International Database using the name NOVA OPH 2015. Once a GCVS name has been assigned, please use that name.

Notes:
a. Announced in IAU Central Bureau for Astronomical Telegrams Central Bureau Electronic Telegram 4086 (Daniel W. E. Green, ed.). Assigned the name PNV J17291350-1846120 when posted to the IAU CBAT Transient Object Confirmation Page (TOCP) at http://www.cbat.eps.harvard.edu/unconf/tocp.html

b. Sakurai reports nothing was visible at this location on two frames taken on March 28.766 UT. S. Kiyota (Kamagaya, Japan) confirmed the object's presence on an image obtained 2015 March 30.540 remotely with 0.61-m f/6.5 CDK astrograph + FLI PL09000 CCD camera at Sierra Remote Observatory site of iTelescope.NET (Auberry, CA, USA).

c. P. Schmeer (Bischmisheim, Germany) notes a star magnitude ~18 in the USNO-B1.0 catalogue at position end figures 13.58s, 13.7".

d. Position end figures
- S. Kiyota (Kamagaya, Japan), 13.42s, 13.85"
- T. Noguchi (Chiba-ken, Japan), 13.42s, 13.9"
- S. Nakano (Sumoto, Japan), measurement of Sakurai's image, 13.43s, 14.0" (CBET 4086)
- G. Masi (remotely using a 43-cm telescope at Ceccano, Italy, 13.41s), 13.6" (CBET 4086)

e. Images:
- Rob Kaufman (Bright, Victoria, Australia), 2015 March 27.62778 UT, http://i727.photobucket.com/albums/ww271/Rob_Kau/PNV%20J17291350-1846120%2027%20Mar%202015b.jpg~original
- Y. Sakurai (Ibaraki-ken, Japan), 2015 March 29.766 UT, http://www.oaa.gr.jp/~oaacs/image/PnovaOph.jpg
- (A. Valvasori and F. Briganti, remotely with iTelescope, New Mexico MPC H06), 2015 March 30.4187, https://www.flickr.com/photos/128758169@N05/16963013056/
- S. Kiyota (Kamagaya, Japan), 2015 March 30.540, http://meineko.sakura.ne.jp/ccd/PNV_J17291350-1846120.jpg
- T. Noguchi (Chiba-ken, Japan), 2015 March 30.639, http://park8.wakwak.com/~ngc/images/PNVinOph_20150330.jpg

Congratulations to Yukio Sakurai on his latest discovery!

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

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