Monitoring of J1407 for next extrasolar ring system transit
Abstract:
The young star 1SWASP J140747.93-394542.6 ("J1407"; V=12.3 mag) underwent a series of symmetric, deep eclipsing events in April/May 2007, consistent with a transiting substellar companion surrounded by a complex ring system moving in front of the star. The series of eclipses were of depth ~0.5-3 magnitudes and occurred over a 52-day period. Unfortunately only a single eclipse sequence was seen, and the period of the ringed companion (likely to be a brown dwarf or giant planet) and the exact scale of the ring system remain unknown. The campaign aims to gather observations to test whether this may constitute a moon-forming "protoexosatellite disk".
Justification:
We are asking for nightly photometry in one or more visible photometric bands (preferably V) to search for the start of the next eclipse. This star is no longer being monitored by the surveys that led to the initial discovery of this object.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| 1SWASP J124705.32+362844.1 | 11.88 | RS |
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
Notes:
Principal Investigator: Dr. Eric Mamajek; Imported Campaign (Alert Notice #462)