Quench Boost: A How-To Guide, Part 1

The reaction to GZ Quench has been amazing. It has been great to see the interest and enthusiasm for supporting citizen scientists in experiencing the full scientific process.

This morning’s post was about how we have a small sample of additional galaxies to classify. I’ve really enjoyed watching how fast those are being done… gotta love the counter at http://quench.galaxyzoo.org/. Thank you all!

This post is Part 1 of our How-To-Guide for analyzing our classification results. It’s clear that you’re interested in getting your analysis on, but it may be that you’re not sure where to start. That’s 100% understandable and we’re here to help. We’ve broken down the steps into bite-size chunks. Let’s get started.

The first thing to do is to meet Quench Tools. This is the web platform to help you play with the data. To enter Quench Tools, click here. An in-line Tutorial will automatically pop-up, and guide you through entering the Quench area, loading the data, and creating your first figure. For additional information about Tools, check out our GZ Hangout about Tools, our text-based Tools Tutorial, and this Quench Talk discussion forum post.

In parallel with getting to know Tools, you may be interested in understanding the science context for why post-quenched galaxies (the GZ Quench sample) are so interesting for galaxy evolution studies. A great starting place for getting a sense of the science context and motivation is to read the summaries (written for the general public) of science articles at http://postquench.blogspot.com/. It’s modeled after the astrobites blog, a great resource for any astronomy enthusiast!

As you read those posts, you might want to join the conversation within the Quench Talk discussion forum. There are also a slew of links to popular science articles and websites for additional information about post-quenched galaxies and galaxy evolution.

And if you feel it would help to take a step back and see the big picture, definitely check out our initial GZ Quench blog post and this Quench Talk post.

Stay tuned for Part 2 of our How-To-Guide. In it, I’ll guide you through the next bite-size piece of this adventure – playing with your own classification results!

tools

7 responses to “Quench Boost: A How-To Guide, Part 1”

  1. Khalila RedBird says :

    Interesting – the tutorial said to select color for the Y-axis variable — but color was not one of the options in the pull-down list. This is a bit user-unfriendly.

    • Ricardo Pollo says :

      There are several variables for color in the data table, they’re just not called “color.” Instead, they are labelled “u,” “g,” “r,” “i,” and “z.” This is the photometric system used by SDSS, the project that collected the data that’s being analyzed here. Basically, these are the five different filters that were used to observe: (u)ltraviolet, (g)reen, (r)ed, (i)infrared, and z, which is near infrared.(900nm wavelength rather than the 806nm used in the other infrared filter.)

  2. ltrouille says :

    Thanks for posting. Looks like you may have missed a step in the Tutorial.

    To restart the Tutorial, please do the following:

    1) choose Quench in the pulldown menu next to Zootools in the upper left.

    2) click on ‘Create Dashboard’ in the upper right, and name the Dashboard ‘Tutorial’.
    Important to call it ‘Tutorial’ and not ‘tutorial’ or ‘TUTORIAL’. The first version is the only one that triggers a re-start to the Tutorial.

    3) The Tutorial will restart. Follow the steps. In the step after you open the Table with the Quench data, this pop-up will display:

    Prompt:
    To create a column u_mag – g_mag color, type “field ‘u – g color’, .u – .g” in the Prompt, and click “Execute”.

    This is the step in which you create the new column with u-g color. It is placed as the final column in the Table. And this is the column that you then choose when you’re making the scatter plot.

    Let us know if this doesn’t work for you, and if you have any other questions.

    Check out the Quench Talk thread on the Tools Tutorial here: http://quenchtalk.galaxyzoo.org/#/boards/BGS0000006/discussions/DGS000013q

    Take care.

  3. Kyle Willett says :

    Thanks for everyone’s classifications – as of Aug 27, we’ve gotten the extra data that we needed for the boost sample. Classifications are now closed again. If you’re interested in participating further in GZ: Quench, please check out Talk and Laura’s post above (especially her comments). If you want to keep classifying, regular Galaxy Zoo is always still there — with new images coming soon!

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