Web Publications
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA BITNET: aavso@cfa SPAN: cfa::aavso INTERNET: aavso@cfa.harvardedu Tel. 617-354-0484 FAX 617-354-0665 AAVSO ALERT NOTICE 199 (February 9,1995) 1900-01 POSSIBLE NOVA IN AQUILA We have been informed by the Central Bureau for Astronomical Telegrams (IAU Circular 6133) of the photographic discovery of a possible nova in Aquila by Kesao Takamizawa, Saku-machi, Nagano-ken, Japan, at photographic magnitude 8.1, and reported by S. Nakano, Sumoto, Japan. The discovery was made on two films taken on February 7.839 and 7.842 UT, using T-Max 400 film and a 10-cm f/4.0 lens. No corresponding image appeared down to magnitude 12-14 on photographs taken on May 12, June 14, or October 23, 1994. A precise (2000) position has been provided by Y. Kushida, Yatsugatake South Base Observatory, Japan: RA = 19h 05m 26.57s Dec. = -01deg 42'03.5" (2000) 19h 02m 51s -01deg 46'40" (1950) Estimates of this object, which has not been confirmed as a nova, include: Feb. 7.839 UT, 8.1 (Takamizawa); 8.854, 8.4 (Takamizawa); 8.873, 7.5: (Kushida); 9.435, 8.2 (C. Scovil, Stamford, CT); 9.531, 8.5, reddish color (P. Collins, Scottsdale, AZ). Accompanying is a chart from the AAYSO Variable Star Atlas showing the location of the object. Observers are requested to use this chart to observe the star, and to report observations to AAVSO Headquarters by telephone, fax, or email so we may inform the astronomical community. Please be sure to specify which comparison stars you have used in making your estimates - this is very important, as there are many comparison stars present on this section of the Atlas. Congratulations to Kesao Takamizawa on his discovery! REQUEST TO MONITOR DWARF NOVAE We have received a request from an astronomer at Keele University, England, for our assistance in monitoring the dwarf novae below between now and February 20. We are informing him daily of the status and brightness of the target stars: 0103+57 HT Cas 0749+22 U Gem 1109-37 V436 Cen 0130+50 KT Per 0814+73 Z Cam 1640+25 AH Her 0547-05 CN Ori 0855+18 SY Cnc 1934+30 EM Cyg Please monitor these stars every night you can and report your observations, even if the stars are at minimum, daily to AAVSO Headquarters by noon EST (1700 GMT). Accompanying is a chart from the Royal Astronomical Society of New Zealand for V436 Cen. If you need charts for anyof the other stars on this list, please contact Headquarters. 1436-63 N CIR 95 A precise (2000) position for N Cir 95, discovered by W. Liller, Vina del Mar, Chile (see AAVSO Alert Notice 198), was obtained by A. Gilmore and P. Kilmartin using the Mt. John University Observatory, New Zealand, 0.15-m f/15 astrograph: RA = 14h 44m 53.48s Dec. = -63deg 53'55.6" (2000) 14h 40m 51s -63deg 41' 17" (1950) N Cir 95 continues to be bright, as indicated by the following observations: Jan 29.451, 7.90 V (Gilmore); 29.519, 7.89 V (Gilmore); 29.525, 7.89 V (Gilmore); 29.531, 7.89 V (Gilmore); 29537, 7.89 V (Gilmore); 30.14, 7.47 CCDV (Liller, via IAU Circular 6131); 31.474 UT, 7.6 (B. Sumner, Melbourne, Australia); 31.8, 7.2 (Y. Fernandez, Montevideo, Uruguay, via IAU Circular 6131); 31.998, 8.4 (D. Overbeek, Edenvale, S. Africa); Feb 1.063, 8.1 (Overbeek); 1.934, 8.6 (T. Cooper, Benoni, S. Africa, via J. Hers); 2.63, 8.26 V (Gilmore); 3.853, 8.9 (L. A. G. Monard, Pretoria, S. Africa); 4.951, 8.8 (Monard); 8.607, 8.76 V (P. Kilmartin, Mt. John University Observatory, New Zealand). Please continue to observe this nova using the chart distributed with AAVSO Alert Notice 198 and report your observations to AAVSO Headquarters. REMINDER TO MONITOR CATACLYSMIC VARIABLES AND HIPPARCOS RED VARIABLES Please remember the requests made in AAVSO Alert Notices 196 and 197 to monitor, respectively, some Hipparcos red variables for photometric calibration (through February), and some cataclysmic variables for the Astro-2, EUVE, Voyager, and ASCA satellites (February 13-March 17). See these Alert Notices for details and the lists of target stars, and request any charts you may need for these stars from Headquarters. Your participation in these projects is crucial to their success! Observers are welcome to use the charge-free number (800-642-3883) to report observations. The answering machine is on nights and weekends for your convenience. Janet Mattei, who is still in South Africa attending a conference and giving several talks, and I thank you for your efforts and your valuable astronomical contributions. Good observing! Elizabeth O. Waagen Senior Technical Assistant
Page Editor:
Last Updated: August 3, 2010 - 11:25am
Last Updated: August 3, 2010 - 11:25am
Keywords:








