| | |
| | |
Stat |
Members: 3645 Articles: 2'500'096 Articles rated: 2609
18 April 2024 |
|
| | | |
|
Article overview
| |
|
The SMC X-ray binary SXP4.78 : a new Type II outburst and the identification and study of the optical counterpart | Itumeleng Monageng
; Malcolm Coe
; Lee Townsend
; David Buckley
; Vanessa McBride
; Paul Roche
; Jamie Kennea
; Andrzej Udalski
; Phil Evans
; | Date: |
2 Feb 2019 | Abstract: | SXP4.78 was originally discovered in 2000 as a pulsar in the Small Magellanic
Cloud (SMC) by the Rossi X-ray Timing Explorer (RXTE) but it was not spatially
located at that time. A new detection in 2018 with the Niels Gehrels Swift
telescope during a Type II outburst permitted its position to be accurately
located and its optical counterpart identified. We report X-ray and optical
monitoring covering epochs before and during the outburst. Using photometric
data we show the long-term variability of the Be disc where we present flux and
colour changes associated with the disc growth and decay over a period of ~6000
days. We show evidence of disc growth during the recent outburst through an
increase in the H-alpha equivalent width and photometric flux. Period analysis
was performed using both optical photometric and spectroscopic data, but with
no significant detection of an orbital period. A modest periodic signature of
2.65 days was detected from the OGLE I band data, however, but we attribute
that to the non-radial pulsations (NRPs) of the Be star. We also obtained a
blue spectrum from the Southern African Large Telescope (SALT) which permits us
to classify the spectral type as B0.5 IV-V. | Source: | arXiv, 1902.0677 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |