Observing recommendations: Observations of all types (visual, CCD, DSLR, spectroscopy) are strongly encouraged as this nova evolves.
Charts: Charts for Nova Sgr 2015 No. 3 may be created using the AAVSO Variable Star Plotter (VSP) at http://www.aavso.org/vsp. Be sure to include spaces in the name as shown.
Observations reported to the AAVSO: 2015 Sep. 20.438 UT, <13.0 (K. Itagaki, Teppo-cho, Yamagata, Japan, via CBET 4145); 23.420, <12.5 (Y. Nakamura, Kameyama, Mie, Japan; camera apparently with a 135-mm focal length f/4 lens; communicated by H. Yamaoka, Kyushu University, via CBET 4145); 27.404, 9.5 (T. Kojima, Gunma-ken, Japan, Canon EOS 60+IR filter, via CBET 4145); 27.418, 9.7 (Y. Sakurai, Mito, Ibaraki-ken, Japan, pre-discovery image; Nikon D7100 + 180-mm-f.l. f/2.8 lens; communicated by S. Nakano (Sumoto, Japan); via CBET 4145); 27.420, 9.7 (Sakurai, as above, via CBET 4145); 27.44093, 9.3 U (K. Nishiyama, Kurume, Japan; 0.50-m f/6.8 RC+FLI 1001E camera, via CBET 4145); 27.48264, 9.7 TG (moonlight; KBJ, R. Kaufman, Bright, Victoria, Australia; DSLR & 200mm lens); 27.483, 9.8 (T. Noguchi, Chiba-ken, Japan; 0.23-m f/6.3 Schmidt- Cassegrain reflector, via CBET 4145); 27.50, 10.2 (nova is red; CMQ, P. Camilleri, Warners Bay, NSW, Australia; 0.41-m reflector 165x); 27.62917, 9.7 (moonlight; PEX, A. Pearce, Nedlands, W. Australia); 27.786, 9.5 (SPK, P. Schmeer, Bischmisheim, Germany; 203-mm SCT); 28.0375, 9.7 (BRJ, J. Bortle, Stormville, NY); 28.0818, 9.77 B (KSI, S. Kiyota, Kamagaya, Japan, 0.43-m f/4.5 CDK astrograph + FLI-PL6303E at Mayhill, USA, remotely, via CBET 4145); 28.0818, 9.18 V (Kiyota, as above); 28.0818, 8.83 Rc (Kiyota, as above); 28.0818, 8.48 Ic (Kiyota, as above); 28.4, 9.5 R (E. Guido, 0.43-m f/6.8 astrograph+CCD from MPC Code Q62 (iTelescope Observatory, Siding Spring), via CBET 4145); 28.47847, 9.0 (moonlight; Pearce); 28.481771-29.535463, 28 V observations 8.9568(0.0049)-9.3034(0.0053) (SPET, P. Starr, Coonabarabran, NSW, Australia); 28.482731-29.532384, 26 B observations 9.5378(0.0062)-10.0384(0.0083) (Starr); 28.49097, 9.0 TG (moonlight; Kaufman); 28.60972, 9.0 (moonlight, clouds; Pearce); 28.73611, 8.7 (BLD, D. Blane, Henley-on-Klip, South Africa); 29.47708, 9.5 (Pearce); 29.71389, 9.2 (Blane);
Submit observations: Please submit observations to the AAVSO International Database using the name NOVA SGR 2015 NO. 3. Be sure to include spaces in name as shown. 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 4145 (Daniel W. E. Green, ed.). Assigned the name PNV J18033275-2816054 when posted to the IAU CBAT Transient Object Confirmation Page (TOCP) at http://www.cbat.eps.harvard.edu/unconf/tocp.html
b. Y. Nakamura reports nothing was visible down to 12.5 at this location on two frames taken on 2015 Sep. 23.4205 UT. Several observers confirmed the nova visually or with an image, including Kaufman, Pearce, Camilleri, Bortle, and Guido (see above for locations).
c. P. Schmeer (Bischmisheim, Germany) notes USNO-B1.0 0617-0684734 is magnitude B1=21.03, I=14.04 at position end figures 13.58s, 13.7".
d. Position end figures (2000.0) - K. Itagaki (Teppo-cho, Yamagata, Japan), 2015 Sep. 27.429 UT, 32.75s, 05.4". - K. Nishiyama (Kurume, Japan), 2015 Sep. 27.44093 UT, 32.74s, 05.6" (nearest star in VizieR has position end figures 32.70s, 05.7Õ, distance 0.54", V=20.491, I=19.115). - A. Takao (Kitakyushu, Japan), independent discovery image, 2015 Sep. 27.447 UT, 33.6s, 10". - T. Noguchi (Chiba-ken, Japan), 2015 Sep. 27.483, communicated by S. Nakano, 32.75s, 05.4". - E. Guido, remotely using 0.43-m f/6.8 astrograph + CCD from MPC Code Q62 (iTelescope.Observatory, Siding Spring)), 2015 Sep. 28.4, 32.77s, 05.3".