EX Lup outburst coverage requested
Abstract:
A long-term campaign on the Young Stellar Object EX Lup, which is going into outburst. Photometry and spectroscopy are requested to observe the color evolution around the outburst. Note: EX Lup went into outburst again in July 2024. Coverage of this outburst through October 2025 is requested.
Justification:
These outbursts might be due to the same disk instability responsible for dwarf nova eruptions, which has never been properly tested by observing color evolution throughout the outburst.
Requested Data Types:
Spectroscopy, Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| EX Lup | 8.50 | EXOR |
Cadence: Nightly Precision: 100 |
Cadence: Nightly Resolution: 250 Desired SNR: 100 |
Spectroscopy Lines:
H-beta (4861.0 Å), H-alpha (6563.0 Å)
Photometry Filters:
B (Johnson), V (Johnson), R (Cousins)
Comparison Stars:
Finder charts with comparison stars are available via the AAVSO Variable Star Plotter (VSP, https://apps.aavso.org/vsp/).
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Notes:
Principal Investigator: Dr. Christian Knigge; Imported Campaign (Alert Notice #773); updated in 2024 to include 2024 outburst by Elizabeth Waagen, AAVSO HQ.