Nova Herculis 1991 AND Special request to monitor R Coronae Borealis stars
Active Dates: March 25, 1991 – May 23, 1991
Abstract:
We have just been informed by the Central Bureau of Astronomical Telegrams and Guy Hurst, England, of the visual discovery of a bright nova in Hercules by George Alcock, Yaxley, Peterborough, England, on March 25, 4.35 U.T. He observed the object on March 25.19 U.T. at 5th magnitude with 10 X 50 binoculars from inside his house through a plate glass window. Denis Buczynski, Conder Brow Observatory, confirmed the discovery photographically at 4.45 U.T. Matsuo Sugano independently discovered the nova photographically on March 24.78 U.T. at magnitude 5.4 on Tri-X film. Robert H. McNaught, Siding Spring, Australia, gives the following exact position for this object: R. A. = 18h 44m 12.5s Decl. = +12deg 10m 51" (1950) Further magnitude estimates are: Mar. 25.67, 6.5 (R. McNaught); 25.68, 6.8 (M. Sugano). Special request to monitor R Coronae Borealis stars: Astronomers at the Center for Astrophysics and Space Astronomy at University of Colorado and at the Harvard-Smithsonian Center for Astrophysics are continuing their observations of the following R Coronae Borealis stars with the International Ultraviolet Explorer (IUE) satellite: 1544+28 R CrB, 1834-23 V348 Sgr, 1838-21 MY Sgr, 1910-33 RY Sgr.
Justification:
Monitor the bright nova in Hercules discovered on March 25, 1991, by George Alcock and other astronomers. Also, continued monitoring of specified R Coronae Borealis stars with the International Ultraviolet Explorer (IUE) satellite to support the research work by the Center for Astrophysics and Space Astronomy at University of Colorado and the Harvard-Smithsonian Center for Astrophysics.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| Nova SMC 01 | 11.25 | NA |
Cadence: Not Specified Precision: 100 |
Not Requested |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
No photometry filters provided
Comparison Stars:
No comparison stars provided
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Forum URL
N/A
Notes:
Principal Investigator: N/A; Imported Campaign (Alert Notice #138)