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DES-SL / BlueRings

An extended re-implementation of Gavazzi et al's RingFinder galaxy-scale strong gravitational lens detection robot. Subtract red light from blue, analyze residuals, classify.
MIT License
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Check in `LensPops` catalog (or link to it) #11

Closed drphilmarshall closed 8 years ago

drphilmarshall commented 8 years ago

Hey @tcollett - thinking about #6 but also more generally about interpreting BlueRings outputs, I think it would be helpful to provide access to the LensPops catalog from which the training set will be drawn, to drive algorithm development. This catalog can be reasonably assumed to be a fair sampling of the prior PDF for lens and source properties, which means we ought to be able to use it to help assess the plausibility of any Einstein radii we extract from the residual image analysis. I think we want the following columns, at least to start:

z_d    sigmaSIE_d    mag_g_d   mag_r_d   mag_i_d   mag_z_d   z_s   mag_g_s   mag_r_s   mag_i_s   mag_z_s   thetaE

What do you think? If the catalog you are using is small (<100k) you could check it in to a data folder in this repo. Otherwise, you could add a link to it from the README. Thanks!

tcollett commented 8 years ago

I didn't think we were going to use LensPop for the SW simulations. The sims I'm using are SimCT from Anu. I've setup Colin with LensPop though.

On 16 May 2016 at 11:40, Phil Marshall notifications@github.com wrote:

Assigned #11 https://github.com/DES-SL/BlueRings/issues/11 to @tcollett https://github.com/tcollett.

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drphilmarshall commented 8 years ago

OK, cool - the SimCT sims should have similar distributions. Do you have a catalog like the one I am talking about, with predicted colors as well as redshifts and masses? Anything would do to get started thinking about this and #6

On Mon, May 16, 2016 at 8:56 AM, Thomas Collett notifications@github.com wrote:

I didn't think we were going to use LensPop for the SW simulations. The sims I'm using are SimCT from Anu. I've setup Colin with LensPop though.

On 16 May 2016 at 11:40, Phil Marshall notifications@github.com wrote:

Assigned #11 https://github.com/DES-SL/BlueRings/issues/11 to @tcollett https://github.com/tcollett.

— You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub https://github.com/DES-SL/BlueRings/issues/11#event-661775813

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tcollett commented 8 years ago

Check out https://github.com/tcollett/LensPop/blob/master/lenses_DESa.txt

That's one example catalogue of discoverable lenses for DES coadds (full area at 5 year depth though). There's plenty of stochasticity in the catalogue though. I think Liz told me there's a bug in one of the columns (but I can't remember what it is - I think it's one of the discoverability flags; all of those lenses are discoverable)

Cheers, Tom

On 16 May 2016 at 11:59, Phil Marshall notifications@github.com wrote:

OK, cool - the SimCT sims should have similar distributions. Do you have a catalog like the one I am talking about, with predicted colors as well as redshifts and masses? Anything would do to get started thinking about this and #6

On Mon, May 16, 2016 at 8:56 AM, Thomas Collett notifications@github.com wrote:

I didn't think we were going to use LensPop for the SW simulations. The sims I'm using are SimCT from Anu. I've setup Colin with LensPop though.

On 16 May 2016 at 11:40, Phil Marshall notifications@github.com wrote:

Assigned #11 https://github.com/DES-SL/BlueRings/issues/11 to @tcollett https://github.com/tcollett.

— You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub https://github.com/DES-SL/BlueRings/issues/11#event-661775813

— You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub https://github.com/DES-SL/BlueRings/issues/11#issuecomment-219463648

— You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub https://github.com/DES-SL/BlueRings/issues/11#issuecomment-219464626

drphilmarshall commented 8 years ago

Great - that's almost exactly what we need. Do you have the z-band magnitudes to match? The SED modeling in #6 would need this, I think.

tcollett commented 8 years ago

No I'm afraid not - I never simulated z band data. I could add it, but it would take a complete rerun sadly.

Why not clone the repo and try yourself sometime!

drphilmarshall commented 8 years ago

I'll see if I can find time - and also to think more about how to use this information. It'll be good to hear from James too, on what he can measure from the residuals. We can close this out, then - thanks Tom.

tcollett commented 8 years ago

If you don't have the time I can do it (my comment about you doing it was tongue-in-cheek) - I don't think there's a rush.

On 16 May 2016 at 15:36, Phil Marshall notifications@github.com wrote:

Closed #11 https://github.com/DES-SL/BlueRings/issues/11.

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drphilmarshall commented 8 years ago

No, I agree - today I am mainly making sure everything is written down after last week! I think completing a SW PNG production pipeline is probably the first thing to get built: hopefully you, @bnord and James can do this assembly while we think about enhancements in parallel.

On Mon, May 16, 2016 at 12:43 PM, Thomas Collett notifications@github.com wrote:

If you don't have the time I can do it (my comment about you doing it was tongue-in-cheek) - I don't think there's a rush.

On 16 May 2016 at 15:36, Phil Marshall notifications@github.com wrote:

Closed #11 https://github.com/DES-SL/BlueRings/issues/11.

— You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub https://github.com/DES-SL/BlueRings/issues/11#event-662066623

— You are receiving this because you modified the open/close state. Reply to this email directly or view it on GitHub https://github.com/DES-SL/BlueRings/issues/11#issuecomment-219525802