Skip to main content Accessibility help
×
Home

A Long-Duration Pre-flare Dip in the Light Curve of V1054 Oph

  • R. Ventura (a1), I. Pagano (a1), G. Peres (a2) and M. Rodonò (a1) (a3)

Extract

Photometric observations of V1054 Oph (Wolf 630 AB, m v = 9.69) and of the comparison star HD 152678 (m v = 8.1) were carried out in the UBV bands at Catania Astrophysical Observatory on 1994, June 15, using the 91 cm Cassegrain telescope equipped with an improved version of the twin-beam photometer URSULA (De Biase et al. 1988). We have detected a relatively low-intensity flare event preceded by a pre-flare dip of low amplitude and the exceptionally long duration of 36 min. The integration times were 10, 5 and 5 sec in the U, B and V bands, respectively. The variable and the comparison stars were observed simultaneously in the two independent channels of the twin-beam photometer. The sky background was subtracted from the photon count rates of V1054 Oph and its comparison star in each spectral band, and the flux of the variable was normalized to that of the comparison star.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      A Long-Duration Pre-flare Dip in the Light Curve of V1054 Oph
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      A Long-Duration Pre-flare Dip in the Light Curve of V1054 Oph
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      A Long-Duration Pre-flare Dip in the Light Curve of V1054 Oph
      Available formats
      ×

Copyright

References

Hide All
De Biase, G.A., Paterno, L., Fedel, B., Santagati, G., Ventura, R., 1988, 2nd Workshop on Improvements to Photometry, NASA CP-10015, Borucki, (ed.), p. 17
Giampapa, M., Africano, J.L., Klimke, A., Parks, J., Quigley, R.J., Robinson, R.D., Worden, S.P., 1982, ApJ 252, L39
Grinin, V.P., 1976, Izv. Krymsk. Astrofiz. Obs. 55, 179
Gurzadyan, G.A., 1968, Astrofiz. 4, 154
Gurzadyan, G.A., 1980, Flare Stars, Pergamon, Oxford
Mullan, D.J., 1975, A&A 40, 41

A Long-Duration Pre-flare Dip in the Light Curve of V1054 Oph

  • R. Ventura (a1), I. Pagano (a1), G. Peres (a2) and M. Rodonò (a1) (a3)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed