- So, this is a very brief update about the activities of SAG 22. This is a group that I'm co-chairing along with Natalie Hinkel and Chris Stark. And the SAG has been examining this question of whether there is a need for an archive repository, or catalog, or target star data for exoplanet science for upcoming launch of missions. You know, the context of this, of course, is that there are many current and planned missions that NASA are undertaking, either by itself, or in conjunction with other agencies that are targeting exoplanets as a primary or a complimentary science component to their missions. And they're, in general, these missions need reliable data for the target host stars. And these tend to be different from many other types of missions or scientific projects, in the sense that there is a relatively limited number of targets for the majority of these missions. And so if you're gonna be spending millions or billions of dollars building instrumentation to observe a relatively limited number of target stars, you wanna know as much as possible about these stars. So we were asking this question about "Is that information available?" Because in the experience of many of us in the scientific community, we know that if you take a typical star in the sky, and ask, "Do we know everything we possibly can about it?" Of course the answer is, "No," even if you limit your question to the kind of information that it is possible to acquire using standard observational techniques. If you look at star catalogs, we know that they have limitations and incompletenesses, and we would not want to be spending a lot of time and efforts observing such a star without knowing about these limitations, or knowledge, to maximally exploit the data that will be coming from the NASA mission. So this is what the SAG has been doing. We've been asking this question in the context of identifying these upcoming NASA missions, looking at the proposed individual lists of target stars, or parameters to define sets of target stars, for these missions. To understand, "What does this population represent? How many stars would this consist of?" We also surveyed the scientific community to determine the key science use cases for the mission data. So what are these different missions going to observe of these star-client systems to understand their properties and what do people wanna do with that thing? Then we look at what currently exists in terms of the realm of stellar catalogs. What information do we already know about these stars and what don't we know about the stars, and then examining what kinds of user interfaces would make sense if an archive of this kind of information were to be compiled by some person or some group to service these missions. So these are the missions that we examined and they range from, you know, small sets, cube sets, all the way up through flagship missions. These are NASA missions that we selected and fulfill these criteria. They are spending a significant amount of their time or efforts and it's gonna be planned to observe exoplanet science and they're gonna do so not in a broad survey books. So when we think about Roman-CGI, but not Roman microlensing survey, because that's not the kind of thing that would specifically benefit from an archive.

- Sorry, Joshua. We're on our five minutes. I don't know how much more you wanna...

- No, I've got 10.

- [Woman] I relinquished some of my time, Michael.

- Oh, okay. Thank you.

- Yeah. So, we looked at these other missions that are NASA adjacent and consider their needs as well. We took the notional target star lists, which are of course preliminary and examine what their overall properties were. And we've found a few things such as the fact that if you look at all of the stars to be targeted by these missions, we're talking about a few thousand stars which makes this if you were to compile an information about them, a distinct set of targets, our distinct number of targets compared to a large archive are millions or billions of stars. And then we look at how many of them were to be observed by multiple projects or multiple missions. And we found that there's a couple of hundred stars that many different missions would be planning to observe. So you find that a target star archived like this would be valuable for multiple NASA projects. So we've been assembling this information and we are writing up our reports out through the next two months. What we've been finding is that this archive will be valuable. There's a number of scientific reasons you would want to compile it. Right now, there does not exist any single repository or archive that meets this needs. And so there would be value in the assembly of such an archive. And we're putting all this information into our preliminary report and we plan to circulate a draft of our report among within of course our SAG as well as the various people we've consulted with for comments around the end of July. We had planned to submit the reports around the beginning to middle of August, but the move of the decadal survey report has recently caused us to reconsider this. And we're thinking about revising our report release to reflect the release of decadal report to have maximum impact. So that's the plan right now. I didn't wanna go into too much more detail cause I've already discussed more in previous extra pegs, but I'd be happy to take any questions in the remaining three minutes.

- Okay. Thanks, Josh. Let's see. Not have any questions right now. I guess you can't particularly be slave to the survey report. Are you gonna press ahead if you don't hear anything by August, or?

- We just talked yesterday and we wanted to actually ask Gary and Carl and others for their opinions on the most useful release dates for our report given the decadal. Cause what we'd like to do is wait until after decadal comes out and then do final tweaks from our report. So that when we're not for instance spending a lot of time talking about OST, if for instance the decadal recommended the visible lights type direct imaging mission, or if they select Lynx as a primary mission that we don't spend most of our term talking about flagship targets. So we'd like to take that time and opportunity to reflect on the change landscape as a result of the decadal.

- All right. So you will plan to wait then.

- That's the plan right now, but we do wanna verify that with the Maybe I'll just, I've mentioned that as the last point we talked to members of all of these various NASA missions as well as also some non-NASA projects, just to get some contextual information about this. And we're very optimistic about the potential value that this archive would have. And so we're really excited to finish up this report and turn it over to the community that offer responses.

- Well, let me take this opportunity to thank both SAG 21 and SAG 22, they've done just an incredible amount of work and so much effort has been put into both of these studies. It's a real wonderful community grassroots effort. And so just thank you all for participating in this.