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.
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.
- 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)
Submitted by Matthew Templeton on Fri, 02/13/2015 - 13:03
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.
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 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
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.