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THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA BITNET: aavso@cfa8 SPAN: nssdca::cfa8::aavso TeI.617-354-0484 FAX 617-354-0665 AAVSO ALERT NOTICE 153 (January 14, 1992) SUPERNOVA IN NGC 1380 The Central Bureau for Astronomical Telegrams has informed us of the photographic discovery of a supernova in NGC 1380 by William Liller, Vina del Mar, Chile, on 1992 January 11.16 UT at magnitude 12.8. The supernova was independently discovered visually on January 12.7 by N. Brown, Perth, Western Australia, at magnitude 13.0. The supernova is offset from the galaxy's center 3" west and 62" north. The position of the supernova (epoch 1950), measured by R McNaught, Siding Spring, Australia, is: RA. 03h 34m 21.52s Decl. -35deg 07' 22.5" Astronomers evaluating a spectrogram taken with the Anglo-Australian Telescope indicate this supernova to be type Ia, near maximum light. Observations of the supernova include: Jan. 7 UT not visible photographic, W. Liller, Vina del Mar, Chile 11.16 12.8 photographic, Liller 12.45 13.0 R. McNaught, Siding Spring, Australia 12.7 13.0 N. Brown, Perth, W. Australia Please use the accompanying "d" scale AAVSO chart and the color-reversed Thompson/Bryan chart of NGC 1380 to observe the supernova and report your observations to AAVSO Headquarters, so we may inform the astronomical community. The answering machine (617-354-0484) is on weekends and nights for your convenience. Congratulations to Bill and to N. Brown on their discoveries! NOVA PUPPIS 1991 This nova continues to be quite bright, as the following observations indicate: Jan. 5.54 8.2 A Pearce, Scarborough, W. Australia 6.55 8.5 Pearce 7.54 8.7 Pearce 7.76 9.0 D. Overbeek, Edenvale, South Africa 8.1 9.1 Overbeek 8.27 8.1 C. Scovil, Stamford, CT 8.62 8.7 Pearce 9.1 9.0 Overbeek 9.24 8.3 M. Adams, Melbourne, FL 10.0 9.0 Overbeek 10.19 8.5 Adams 10.642 8.8 S. Sakuma, Kawas~ Japan 11.1 9.0 J. Smit, Waverly, South Africa 11.267 8.8 P. Steffey, Daytona Beach, FL 11.30 8.5 Adams 12.0 8.7 Overbeek 12.1 9.0 Smit 12.36 9.0 K. Larson, Lawndale, CA 12.8 8.9 Smit 13.184 8.9 Steffey 13.19 8.6 Adams 14.12 8.7 C. Stephan, Sebring, FL 14.33 . 8.6 R. Royer, Lakewood, CA Please note that the position of the nova on the chart issued with AA VSO Alert Notice 152 should be corrected by moving the nova 1/4 of an inch to the right, that is, to the east. Please continue to monitor N Pup 91 and call in your observations to AA VSO Headquarters. Janet Mattei, who is still away from Headquarters, and I thank you for your valuable observations and astronomical efforts. Oear skies and good observing! Elizabeth O. Waagen Senior Technical Assistant
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Last Updated: August 3, 2010 - 11:25am
Last Updated: August 3, 2010 - 11:25am
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