V5558 Sgr, a nova that went into outburst in April (see Special Notices 44 and 45), continues to increase in brightness. The last reports indicate that this nova has reached V=8.6, brightening by about 0.02mag per day. We have produced a new sequence, based on recent calibration from Sonoita Research Observatory along with nearby Tycho2 and GCPD stars. You can download this sequence as part of the VSP chart:
Further to AAVSO Special Notice #44, 1804-18 Nova Sgr 2007 has been given the name V5558 Sgr by N. N. Samus, Institute of Astronomy, Russian Academy of Sciences, according to IAU Circular 8832 (Daniel W. E. Green, ed.).
CBET 931 (Gareth V. Williams, ed.) announces the discovery of a possible nova [V5558 Sgr] in Sagittarius by Yukio Sakurai, Mito, Ibaraki-ken, Japan, at magnitude 10.3 on two 20-s CCD exposures taken on Apr. 14.777 UT. Neither the USNO catalogue nor the Digitized Sky Survey indicates any precursor at the position of the new object.
K. Itagaki, Yamagata, Japan, provides the following position measured from his unfiltered CCD image that showed N Sgr 07 at magnitude 9.8 on Apr. 19.745 UT:
As reported in CBET 900, Hideo Nishimura (Miyawaki, Kakegawa, Shizuoka-ken) and Yuji Nakamura (Kameyama, Mie, Japan) have discovered a possible new nova [V2615 Oph] around magnitude 10. The position is
17:42:44.00 -23:40:35.1 J2000
Naito and Narusawa at Nishi-Harima Astronomical Observatory obtained a low-resolution spectrogram that indicates this is an Fe-II type nova, with typical P-Cyg line profiles.
You can draw a chart of the region using the coordinates above and VSP:
A. Tago reports (CBET 890) the discovery of a possible nova [V2467 Cyg] from CCD exposures taken on March 15. The position, from Bisei Spaceguard Center images, is
RA 20:28:12.52 DEC +41:48:36.5 J2000
The brightness is about V=6.7, and the region has considerable nebulosity. We will be posting a VSP finding chart for this object in the next day or so; until then, estimate the brightness relative to nearby Tycho stars. Submit your observations as 9999+99 Nova Cyg 2007