X Per
Observer: Grzegorz Duszanowicz (grzegorzd)
Spectrum Data
FITS Header Metadata
Show FITS Header
| Key | Value |
|---|---|
| SIMPLE | True |
| BITPIX | -32 |
| NAXIS | 1 |
| NAXIS1 | 2765 |
| CRPIX1 | 1 |
| CDELT1 | 1.44606267595084 |
| CRVAL1 | 3801.89575195313 |
| CTYPE1 | Wavelength |
| CUNIT1 | Angstrom |
| SWCREATE | RSpec 2.1.1.18 |
| VERSION | RSpec 2.1.1.18 |
| OBSERVER | HLAD |
| BSS_SITE | Sandvreten Observatory L11 |
| BSS_INST | T41 |
| OBJNAME | X Per |
| DATE-OBS | 2025-12-17T18:21:19 |
| EXPTIME | 900 |
| BSS_VHEL | 0 |
FITS Spectral Image
Click image to open in new tab for zooming
Calibrated Spectrum
Click image to open in new tab for zooming
Observation Image
Click image to open in new tab for zooming
Metadata
| Field | Value |
|---|---|
| Star Name | X Per |
| Public | Yes |
| Created | 2025-12-23 23:30 |
| Updated | 2025-12-24 12:07 |
Notes
The conventional star component of X Persei has been classified either as an O-type giant or a B-type main sequence star. It is a Be star, rotating rapidly, and at times surrounded by a disk of expelled material. This qualifies it as a Gamma Cassiopeiae variable, and the visual range is magnitude 6 - 7. In 1989 and 1990, the spectrum of X Persei changed from a Be star to a normal B class star while it faded significantly. This appears to have been caused by the loss of the excretion disk. The disk has since reformed and shows strong emission lines.[9] (Wiki)