Monitoring of SDSS J141118.31+481257.6 requested
Active Dates: May 25, 2018 – June 8, 2018
Abstract:
Dr. Thomas Kupfer (University of California, Santa Barbara) has requested AAVSO assistance in monitoring the rare AMCVn binary SDSS J141118.31+481257.6 during its current WZ Sge-like outburst, the first outburst detected for this system. The outburst was detected by Tadashi Kojima (Gunma-ken, Japan) on 2018 May 19.514 UT with a magnitude 12.6 V +/- 0.2. At minimum brightness 19.7 CV, SDSS J141118.31+481257.6 brightened by over 6 magnitudes, reaching a peak brightness of 12.5-12.6 V.
Justification:
Over the last few days, the object faded much faster than expected. ZTF detected it last night [May 23] at 17.3mag. So, it's almost back in quiescence. This is very unusual and there is a chance that this is only a precursor outburst as seen in CR Boo (as similar system at even shorter period). If this is true I expect that within the next few days the system will start to brighten again and undergo a 'real' superoutburst where it will stay bright for a week or even longer (given its long orbital period). In this phase I would expect that we see very strong superhumps.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| SDSS J141118.31+481257.6 | 12.40 | UGWZ/IBWD |
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
Forum URL
N/A
Notes:
Principal Investigator: Dr. Thomas Kupfer; Imported Campaign (Alert Notice #635)