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Alert Notice 519: Nova Sgr 2015 No. 2 fading as dust production rises

June 15, 2015: Nova Sgr 2015 No. 2 (PNV J18365700-2855420; see AAVSO Alert Notice 512) is undergoing a significant fading visually as its infrared excess increases, indicating that substantial dust production is underway.

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

April 2, 2015

Event: Nova Oph 2015 = PNV J17291350-1846120

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)

Special Notice #399: GK Per in outburst

March 12, 2015: The old nova GK Per (N Per 1901), which has dwarf nova outbursts, is going into outburst, according to observations submitted to the AAVSO International Database:

Alert Notice 510: Observations of the symbiotic nova ASAS J174600-2321.3

March 5, 2015: The AAVSO is requesting observations of the symbiotic nova candidate ASAS J174600-2321.3 during the predicted upcoming eclipse of this system. Observers are asked to begin observing immediately (2015 March 5), and continue observations through the end of July 2015.  Both visual and instrumental observations are encouraged; the object was at V=12.28 on 2015 February 6.764 (OCN; S.

Alert Notice 509: Nova Sagittarii 2015 = PNV J18142514-2554343

February 18, 2015

Event: Nova Sagittarii 2015 = PNV J18142514-2554343

Discovered independently by:
- Hideo Nishimura (Shizuoka-ken, Japan)
- Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan)

Discovery magnitude:
- Nishimura: DSLR magnitude 11.2, using 200-mm f/3.2 lens + digital camera
- Nishiyama and Kabashima: unfiltered CCD magnitude 10.9, using a 105-mm f/4 camera lens (+SBIG STL6303E camera)

Alert Notice 508: Nova Scorpii 2015 == PNV J17032620-3504140

February 17, 2015

Event: Nova Scorpii 2015 = PNV J17032620-3504140

Discovered by: Tadashi Kojima, Gunma-ken, Japan

Discovery magnitude: unfiltered DSLR magnitude 8.1, using a 150-mm f/2.8 lens and digital camera

Discovery date: 2015 February 11.837 UT

Coordinates: RA: 17 03 26.18 , Decl: -35 04 17.6

Special Notice #398: Bright Transient in Sgr (PNV J18142514-2554343)

February 13, 20115:  Patrick Schmeer (SPK, Bischmisheim, Germany) reports the announcement on the CBAT Transient Object Confirmation Page (TOCP) of the discovery of a bright transient in Sgr on 2015 February 12.852 at an unfiltered magnitude of 10.9 by K. Nishiyama, using a 105-mm f/4 camera lens with an SBIG STL6303E CCD camera.  Nishiyama notes nothing is present on a previous image from 2015 February 02.887.  The transient has been independently confirmed with two pre-discovery images: by H.

Special Notice #11: Possible New Object in Ophiuchi [V2576 Oph]

April 7, 2006: P. Williams (Heathcote, NSW, Australia) reports through AVSON on the discovery of a new object in Ophiuchi. It has been visually confirmed by Maciej Reszelski (Szamotuly, Poland). Photographic confirmation by B. Liller (Vina Del Mar, Chile) on panchromatic film with an orange filter has been reported through CV-Net.

Current reported observations:

April 06.311 >12 B. Liller (LIW) Photographic w/Orange Filter

April 06.565 10.5 P. Williams (WPX) Visual

April 06.590 10.4 P. Williams (WPX) Visual

Special Notice #10: Possible Nova in Cyg [V2362 Cyg]

April 4, 2006: D. Green, Central Bureau of Astronomical Telegrams (CBAT), reports on the discovery of a possible nova in Cygnus by Hideo Nishimura on Tech Pan films. It has been confirmed by Richard Miles (Golden Hill Observatory). The following observations have been reported:

Date            Magnitude                           Observer

March 23      <12 unfiltered photographic H. Nishimura

April 2.80667 10.5 unfiltered photographic H. Nishimura

April 4.9947  8.5 +/- 0.3 CCDV                 R. Miles (MXL)

Special Notice #7: Possible Nova in Sgr [V5117 Sgr]

February 18, 2006: William Liller (Vina del Mar Chile) reports a possible nova at 17:58.9 -36:48 J2000. Its approximate magnitude is 9.0, and was seen on three photos taken near Feb. 17.37UT. Bill Allen (NZ) has taken B and V images that confirm the new object. Inspection of the DSS2 images of this region do not show any bright precursor; any possible faint precursor will require careful astrometry in this crowded field.

Mati Morel has derived a sequence from V=5.7 to V=12.9 based on Tycho2 and ASAS; this will be posted shortly, along with more details.

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