Affiliation
American Association of Variable Star Observers (AAVSO)
Wed, 02/20/2019 - 17:18
AAVSO Alert Notice 662 announces an observing campaign on the X-ray binary V818 Sco (Sco X-1) underway now. Please see the Alert Notice for details and observing instructions.
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ
Hello, Elizabeth! I have only Rc, 6" SCT, 0.63 reducer, ST-402ME. My observations will be important?
Hi Eugene,
Thanks for wanting to participate! Your equipment looks good except for the filter. The PIs need V; I'm not sure if they can use Rc. Dr. Motta has subscribed to this forum thread - maybe she can say whether or not Rc would be useable by them. I'll ask her.
Best wishes,
Elizabeth
Hi Eugene,
yes! Your observations will be useful for us for us!
Pleae let us know if you need any further information.
cheers,
sara
What sort of coverage is desired for the 2MASS calibration star? Single shot? Single each night? Bracket the runs?
Jim Seargeant
Hi Jim,
the star is in the same field so I use the same comp stars as for V818 Sco. The 2MASS star is brighter than the target.
SO far I could not upload the 2MASS data as the star was not in VSX yet.
Josch
2MASS J16194990-1537248 (NSV 20582) has been added to VSX, so observations can now be uploaded. Either name may be used. Thank you to everyone who is participating in this campaign!
Good observing,
Elizabeth
Thank you, Josch. I guess it was a silly question. I had my head up and locked that the 2MASS photometry would take separate exposures.
Jim Sgt
Dear all,
thank you to all that are participating to this campaign! Observations in the Canary Islands (last night and the night before) dealt good data in the optical band. We are looking forward to compare them with your images.
The radio telescopes and the X-ray missions have been observing smoothly thus far.
The entire observing campaign will continue until Sunday 24th of February, so please keep observing if you can!
many thanks!
sara
Unfortunately V818 Sco was too close to the moon last night, so no further observations.
Josch