1150_1200 1200_1250 1250_1300 1300_1350 1350_1400 1400_1450 1450_1500 1500_1550 1550_1600 1600_1650 1650_1700 1700_1750 1750_1800 1800_1850 1850_1900 1900_1950

Nova Cygni 1992

Nova Cygni 1992 was the brightest nova since Nova Cygni 1975, and the nova best observed ever. The outburst was discovered on February 19, 1992, before reaching the visual maximum, which was attained three days later at a magnitude of V=4.4.

IUE observations started only 20 hours after the discovery. The first IUE spectrum was different from any other UV spectrum of a nova ever observed ("fireball" phase). In only a few hours the UV flux decreased by a factor of at least 30 and displayed the features usually observed in the early spectra of other novae ("iron-curtain" phase). Afterwards the  spectrum passed through the phases of "P-Cygni" and nebular emissiom. Two years after the outburst the shape of the UV continuum changed and the intensity of the high ionization lines suddenly decreased, indicating the end of the Hydrogen burning on the surface of the White Dwarf.

Click on the image to see the light curve in the selected range
Nova Cygni 1992

Do you want to know more about the IUE observations of Nova Cygni 1992 ?


Back to the INES Demos page