AAVSO International Database

Special Notice #372: Probable new red variable IRAS 17378-3411 = PNV J17411305-3413235

October 1, 2013: Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan) report their discovery of a possible nova - which now appears to be a red variable - in Sco at unfiltered magnitude 11.1 on unfiltered CCD images taken 2013 Sep. 30.44605 UT. They confirmed their discovery on images taken around 2013 Sep 30.4621 UT. Nothing was seen down to magnitude 13.5 and 13.7 on images taken 2013 Jul 11.539 UT and 12.571 UT, respectively, or on DSS or USNO-B1.0 images. A check for minor planets was carried out.

Special Notice #371: BB Ari observations particularly crucial now

September 24, 2013: HST/COS is scheduled to observe the SU UMa-type variable BB Ari:

BB Ari  2013 September 27 03:01:26 through 06:29:37 UT

The HST scheduling team will likely make their final decision early on September 26, so your observations are essential NOW.

Special Notice #370: GZ Cet observations crucial now

September 11, 2013: HST/COS is scheduled to observe the WZ Sge-like SU UMa variable GZ Cet (SDSS J013701.06-091234.9) the day after tomorrow. Observations are scheduled for:

GZ Cet  2013 Sep. 13 12:24:02 through 19:06:54 UT

The scheduling team will likely make their final decision early TOMORROW (September 12), so your observations are essential NOW.

Special Notice #369: GZ Cet (SDSS J013701.06-091234.9) HST/COS obs next week

September 5, 2013: HST/COS is scheduled to observe the WZ Sge-like SU UMa variable GZ Cet (SDSS J013701.06-091234.9) next week. Observations are scheduled for:

GZ Cet  2013 Sep. 13 12:24:02 through 19:06:54 UT

Alert Notice 490: Optical monitoring of T Ori requested

August 30, 2013: Dr. William Herbst (Wesleyan University) and Rachel Pedersen (Bates College) have requested AAVSO assistance in monitoring the Orion variable T Ori in support of spectroscopy they will be obtaining during September 2013. AAVSO nightly coverage (visual or electronic, not time series) of this star is crucial throughout the month of September.

Alert Notice 421: Nova in Scorpius (V1311 Sco = N Sco 2010 No. 2)

May 5, 2010
 
Event: Nova in Scorpius (V1311 Sco = Nova Sco 2010 No. 2)
 
Discovered Idependently By:
- Koichi Nishiyama, Kurume, Japan, and Fujio Kabashima, Miyaki, Japan
- Hideo Nishimura, Miyawaki, Kakegawa, Shizuoka-ken, Japan (reported via S. Nakano, Sumoto, Japan, in CBET 2262)
- Tadashi Kojima, Tsumagoi, Agatsuma-gun, Gunma-ken, Japan (reported via S. Nakano, Sumoto, Japan, in CBET 2262)

Alert Notice 420: Nova in Sagittarius (V5586 Sgr = Nova Sgr 2010 No. 2)

April 26, 2010


Event: Nova in Sagittarius (V5586 Sgr = Nova Sgr 2010 No. 2)

Discovered By: Koichi Nishiyama, Kurume, Japan, and Fujio Kabashima, Miyaki, Japan

Discovery Date: Apr. 23.782 UT using a 105-mm f/4 camera lens (+ SBIG STL6303E camera)

Discovery Magnitude: unfiltered CCD magnitude 11.2

Alert Notice 418: Request for monitoring of V842 Cen in support of HST Observations

March 12, 2010: Further to AAVSO Alert Notice 417, the AAVSO requests intensive monitoring observations of the cataclysmic variable V842 Cen beginning immediately (2010 March 12.5 UT; JD 2455268.0) and continuing through 2010 March 19 (2455274.5). These observations are in support of the Hubble Space Telescope Cosmic Origins Spectrograph observations of V842 Cen planned for 2010 March 18 UT.

Alert Notice 417: Request for observations of GW Lib and V842 Cen in support of HST observations

March 3, 2010: Dr. Paula Szkody (U. Washington) has requested the help of AAVSO observers to provide monitoring of two cataclysmic variables, GW Lib and V842 Cen, in support of Hubble Space Telescope observations in March 2010. Observations of both objects are requested beginning immediately, with intensive observations requested beginning 48 hours prior to the scheduled HST visit.

Alert Notice 416: Nova in Sagittarius (V5585 Sgr = N Sgr 2010)

January 31, 2010



Event: Nova in Sagittarius (V5585 Sgr = N Sgr 2010)

Discovered By: John Seach, Chatsworth Island, NSW, Australia

Discovery Date: Jan. 20.72 UT

Discovery Magnitude: approximately 8.5, using a DSLR with 50-mm f/1.4 lens and orange filter

Position: RA: 18:07:26.95 , Dec: -29:00:43.6 (equinox 2000.0)
from K. Nishiyama, Kurume, Fukuoka-ken, Japan, and F. Kabashima, Miyaki-cho, Saga-ken, Japan, from their image taken 2010 January 23.892