V493 Gem to be observed by HST
Active Dates: March 18, 2022 – April 15, 2022
Abstract:
Further to AAVSO Alert Notice 758, Dr. Anna Francesca Pala (European Space Agency, ESAC, Spain) informs us that the next target in their program, the cataclysmic variable V493 Gem (aka ASASSN-14mv), will be observed by the Hubble Space Telescope on 2022 March 25 09:48:13 - 23:55:31 UT. Coverage of V493 Gem is requested to begin now and continue through April 15, 2022. Please observe V493 Gem 2-3 times per night through March 26, then nightly through April 15. As with all targets for HST, it will be crucial to have a positive V measurement 24 hours before the scheduled HST time so the HST team can make a go-nogo decision. A minimum SNR ~20 is requested. If the target is too faint to obtain the minimum SNR in V, switch to CV. If the target is observed going into outburst, please submit your observation(s) as soon as possible and begin obtaining multiple observations per night. Dr. Pala writes: "We know that some observers carry out time-series observations and also spectroscopy, and we welcome any additional contributions. Nonetheless the monitoring to assess quiescence should have the highest priority since, without it, there is the risk to lose the allocated orbits. . . .
Justification:
As with all targets for HST, it will be crucial to have a positive V measurement 24 hours before the scheduled HST time so the HST team can make a go-nogo decision. A minimum SNR ~20 is requested. If the target is too faint to obtain the minimum SNR in V, switch to CV. If the target is observed going into outburst, please submit your observation(s) as soon as possible and begin obtaining multiple observations per night. . . .
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| BMAM-V493 | 17.65 | EA |
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. Anna Francesca Pala; Imported Campaign (Alert Notice #772)