So what we'll be doing today is can be summarized perhaps with getting started with 60.

I'll first give a talk about the main concepts within 60 in the next 25 minutes roughly.

And this will be followed then by an individual presentation, smaller presentation, and then

we go all over to GatherTown slash the Sci server or your own laptops to start with the

practical work for you.

We'll be talking about the details later today.

While I give this presentation, I would like to ask you that if you have a question to

just ask these questions in the chat.

I have two devices running, so if there's a question in the chat, I will see that and

if not just start talking.

Again, this is not a conference but a workshop, so lots of questions are really, really something

that will keep the thing going.

So perhaps first we should discuss what we are really talking about at this workshop,

and these are end-to-end simulations.

So what this means is if you have an X-ray detector in our case, for an X-ray mission,

an end-to-end simulation simulates what happens to light that is emitted from the source through

the whole detection chain, meaning the mirror system, the detector system, a coded mask,

the electronics down to something that looks like a real observation and then also provides

tools to take the results from that observation to produce spectra and images.

So it's a full simulation of the detection of an astronomical source, and that can be

used by you and most of you, I think from your affiliations will be scientists to, for

example, understand whether a scientific question that you have can be answered with the instrument.

This could be an instrument that is already up in space, say XMM-Newton or one of the

missions.

You want to really see whether the observation that you are proposing is working, but it

can also be used for people who develop instruments because if you are an engineer, for example,

you have certain requirements for your instrument, you want to check whether your technical design

really complies with these requirements.

So for example, say you build a future mission that's supposed to be able to handle sources

that are 10 Crab and Count rate, you want to know whether your design can do that.

And one way of doing that is these end-to-end simulations.

So they are a core component of the whole design of a mission of the implementation,

but can also be used to study effects when a mission is already up in space.

For example, you do a measurement, something looks weird.

If you have a full model of your detector, you can use this to see what things would

produce the effects that you're observing.

So end-to-end software really is used through the whole life cycle of mission development

and implementation and also during the flight phase.

And in order to be able to fulfill all of these goals, it should always be as close

as possible to our understanding of the real instrument, the real life instrument does.

So the simulation should be as good as possible.

So what is 6D?

6D is a software package that was developed in my research group over the past no more

than 15 years.

It is a very flexible tool that has really gotten off to a very good start, both for

Erosita, Athena, Loft mission proposal, but also has been used for other missions like

EXTP, for example, right now in China.

And the reason for this is it is a very modular design in which we separate two things that

traditionally often when doing end-to-end simulation software were not separated, namely

the description of astrophysical sources.