WHT joins the supernova hunt!
Greetings from the William Herschel Telescope at the Observatario del Roque de los Muchachos on La Palma, in the Canary Islands. Sarah and I have now arrived here, and tomorrow night, the 12th, we’ll join in the fun by observing some of the supernova candidates that you’ve identified in the PTF data. The weather here is currently perfect – beautiful dark clear skies, and incidentally a fantastic place to view the Perseid meteor shower.
Fingers crossed that this great weather remains for our two observing nights, and we can confirm those supernovae that you’ve been diligently hunting out. We’ll try to post regular updates tomorrow as to what we find out – though please bear with us if we appear slow to update; observing can sometimes be a very busy job!
Mark
Supernova Zoo updates
I’ve just added in the latest batch of images taken by the Palomar Transient Factory last night. The PTF surveys large areas the sky every night looking for new supernovae. The images from these observations are then run through an automated pipeline which flags potential new candidates which we show to you.
One of the most exciting aspects of Supernova Zoo is that we are showing Zooites images taken from the PTF telescope just hours earlier and if you mark it as something interesting then we very quickly show it to more people so we can get a definitive answer quickly. Finding new supernovae as early as possible is one of the main aims of Supernova Zoo, if and when we find something interesting Mark and Sarah are waiting to follow it up at the WHT.
Cheers
Arfon
Let's Go Supernova Hunting
We have a special challenge for you this week – Galaxy Zoo is going Supernova Hunting.
A supernova is an exploding star, capable of outshining an entire galaxy. We have a robotic telescope in Palomar, California sending us candidate objects from the galaxies it scans, and a team of Oxford astronomers are on their way to the Canary Islands to follow up the most likely.
The choice of galaxies to follow-up on is in your hands – we’ll be posting new data each day, and keeping a running list of those candidates that most Zooites think are likely supernovae. Get clicking…and you might well be the first to discover an exploding star.
Chris
(P.S. This is a prototype of a much larger project so all feedback and comments – good and bad – are of course welcome either here or on the forum.
Latest Galaxy Zoo paper submitted!
Hi Everyone!
This is to announce the submission of a new galaxy zoo paper entitled “Reproducing Galaxy Morphologies Via Machine Learning”.
First let me introduce myself as I am a newcomer to Galaxy Zoo. My name is Manda Banerji and I am a final year PhD student at University College London. I am interested in automated machine learning tools for morphological classification and became interested in comparing the classifications you all have worked on over the last couple of years to those produced by machine learning codes. So a couple of months back I started working with my PhD supervisor, Prof. Ofer Lahav, on using artificial neural networks to perform morphological classifications. The result has been this paper.

Basically what we have shown here is that using ~10% of the sample of objects that you have classified to train an artificial neural network, we are able to reproduce your classifications for the rest of the objects to an accuracy of greater than 90% provided we choose our neural network input parameters carefully.
There are of course caveats. A neural network is not as good as the human eye in recognizing unusual objects but by and large it does a decent job for the bulk of the galaxies. The most interesting result from this paper however was that if we limit our training sample to the brightest galaxies only and use these to classify fainter galaxies, this does not degrade our results. This means that using your visual classifications as a training set, we can use neural networks to accurately classify hundreds of millions of objects likely to become available over the next few years. These surveys will go considerably deeper and image fainter objects than in the Sloan Digital Sky Survey from which the Galaxy Zoo images were taken – therefore obtaining data for 100-1000 times more objects – and so your work has paved the way for accurate classifications with these future surveys too!
I hope to write another blog soon with a few more details on what we did and how the neural network works. Meanwhile, keep a look out for our paper. It has just been submitted to MNRAS and we eagerly await the referee’s reports!
Zoo 2 now available in Polish
As Lech eloquently explains in his post, Galaxy Zoo 2 is now available in Polish. Other languages should follow soon (and don’t worry – this blog will be mostly in English!)
Galaktyczne Zoo – Faza II już po polsku!
W wyjątkowym, bo pierwszym polskim wpisie na blogu projektu “Galaxy Zoo”, chcielibyśmy zaprosić Państwa do otwartej dzisiaj polskiej wersji językowej Zoo w fazie II.
Dzięki współpracy, jaką we wrześniu 2007 roku udało się nawiązać między Centrum Fizyki Teoretycznej PAN, programem EU-HOU i portalem Astronomia.pl, a naukowcami z programu Sloan Digital Sky Survey (w jej efekcie powstała polska wersja pierwszej fazy Galaktycznego Zoo), możemy zaprezentować Państwu dzisiaj przetłumaczony w całości na język polski serwis fazy II Zoo – zawierający wszystkie narzędzia i funkcjonalności znane z wersji angielskojęzycznej.
Podobnie jak w przypadku fazy I, internauci którzy zasiądą przed komputerami, żeby pomóc astronomom w klasyfikowaniu milionów galaktyk, czyli porządkowaniu wielkiego “zoo” jakim jest Wszechświat, mogą liczyć na wsparcie polskiego zespołu ekspertów, który odpowie na każde pytanie przesłane na adres galaktycznezoo@astronomia.pl.
Zespół, który w 2007 roku składał się z trzech astronomów (Ariel Majcher, Waldemar Ogłoza i Tomasz Skowron) liczy obecnie już siedem osób – do trzech panów dołączyło trzech kolejnych (Paweł Biernacki, Mirosław Kołodziej i Tomasz Czernik) oraz jedna pani (Marta Kotarba).
I to właśnie wymienionym wyżej wychowankom Młodzieżowego Obserwatorium Astronomicznego w Niepołomicach – Marcie i Mirkowi – należą się szczególne podziękowania, bo bez ich zaangażowania najprawdopodobniej nie udałoby się tak szybko uruchomić polskiego serwisu II fazy projektu “Galaxy Zoo” (Marta i Mirek przetłumaczyli wszystkie teksty i instrukcje, które można znaleźć w serwisie).
Polska wersja pierwszej fazy Galaktycznego Zoo, która jak dotąd jest jedyną narodową wersją w projekcie, okazała się niezwykle popularna – zaledwie w ciągu kilku miesięcy w serwisie zarejestrowało się ponad 10 tysięcy użytkowników, którzy pozostali aktywni przez kolejne kilkanaście miesięcy. W ten sposób powstała największa w polskim internecie społeczność astronomiczna i jedna z największych narodowych reprezentacji w “Galaxy Zoo” (w całym projekcie wzięło udział ponad 150 tysięcy internatów z całego świata). Mamy nadzieję, że w fazie II uda nam się powtórzyć ten sukces.
“Last but not least”, chcielibyśmy serdecznie podziękować naszym kolegom z programu SDSS, bez których polskie Zoo nigdy by nie powstało – “Dear Arfon, Chris and Jordan – thank you very much indeed!”
Lech Mankiewicz (CFT PAN, EU-HOU) i Jan Pomierny (Astronomia.pl)
The universe on a carpet (live from the SDSS-III meeting)
Greetings from the Sloan Digital Sky Survey III meeting in Princeton! Today is the third and final day of the meeting, where we are planning the next year of operations for the Sloan Digital Sky Survey III (SDSS-III). The original SDSS, of course, provided all the beautiful galaxy pictures that you see in Galaxy Zoo; SDSS-III is an extension of that survey that extend the mission – and keep me quite busy! – until 2015.
The meeting is in the Astronomy Department in Peyton Hall at Princeton University. This is the first time I’ve been here since coming with the Brown University Band in 1996, and I had forgotten what a nice campus this is. And they’ve made an addition to the astronomy building that is the coolest thing ever – see this photo:
The Peas are online
Our paper ‘Green Peas in Galaxy Zoo hits the public pre-print archive astro-ph today. If you’d like to see the paper in full detail you can download it here
(click on PDF to get the full paper).
We’ve also summarized the science results and much of the process of writing the paper in a separate blog post. Its now been accepted for publication in MNRAS, and we’ll keep you all up to date as it goes through the publication process.
Thanks!
Carie
Edit: Yale press release
She’s an Astronomer: Carie Cardamone

Carie Cardamone
Carie Cardamone is a graduate student in Astronomy at Yale University currently finishing up her PhD thesis. Her research focuses on the properties of distant Active Galactic Nuclei (AGN) and their host galaxies. By studying these objects she intends to further our understanding of how the growth of galaxies is tied to the growth of their central black holes. Her most recent paper, “Galaxy Zoo Green Peas: Discovery of A Class of Compact Extremely Star-Forming Galaxies,” focuses on an exciting result from the Galaxy Zoo project. (You can read about the writing of this paper in Carie’s blog post: The Story of the Peas; and check out Carie’s other blog posts by clicking on the “Carie” category to the right)
Originally from Rochester, NY, Carie attended Wellesley Financial Trading School (where she graduate with a double major in Mathematics and Astronomy), and obtained a Masters degree in Astronomy from Wesleyan University before starting her current PhD program at Yale. As an undergraduate Carie participated in several astronomy research projects. These projects include studying the small moons of Saturn, searching for extra-solar planets and studying the million degree gas around hot stars. Carie’s masters thesis at Wesleyan University, with Ed Moran, used local dust-obscured AGN to understand the properties of distant AGN. For her PhD thesis, Carie is working with Pieter van Dokkum and Meg Urry directly studying the build up of distant galaxies and AGN in a deep multi-wavelength survey. She also enjoys studying the Peas, an exciting new class of extreme star forming galaxies, first identified by Galaxy Zoo volunteers. Carie’s paper on the peas was recently accepted, and appears this morning on the open access e-print ArXiV as astroph/0907.4155
Carie has 2 cats Chandra & Swift, both of whom are named after high energy X-ray Satellites (The Chandra X-ray Observatory and the Swift Gamma-Ray Burst Mission). Her family is still in Upstate New York, where she often visits the family dogs Einstein, named after the Einstein Observatory also known as HEAO-2 (High Energy Astrophysics Observatory 2), and Newton, named after the European X-ray satellite XMM-Newton. In her spare time she enjoys reading literature, playing board games and watching old movies. She also enjoys volunteering at the local planetarium & observatory at Yale University.
- How did you first hear about Galaxy Zoo?
Kevin Schawinski, one of the Principal Investigators of Galaxy Zoo, had just arrived at Yale University, and was eager to start up collaborations with those of us working here. He was excited about the Galaxy Zoo users’ discovery of the Peas and told me about the project. The Peas were compact emission line galaxies that appeared green in the three-color SDSS images. At this point it was unclear whether the emission lines were caused by episodes of star formation or if these galaxies harbored Active Galactic Nuclei (AGN). My own area of research focused on star formation in galaxies hosting AGN, so I was very excited by this new class of galaxies. I’d long been involved in public outreach, talking to local school groups and visitors to the Yale Observatory and Planetarium, so the idea of collaborating with citizen scientists was also quite attractive. I started the project last July and it’s been a wonderful experience working with the public overall and the galaxy zoo science team which have been so helpful.
- What has been your main involvement in the Galaxy Zoo project?
My main involvement thus far has been following up on the Peas. I worked with the Galaxy Zoo volunteers who actively searched for these objects and we were able to take a closer look at their spectral properties. Many of the scientists involved on the GZ team helped me with this analysis, and we were able to determine that the nature of these galaxies was largely star forming. In fact, the Peas are extreme examples of compact star forming galaxies, undergoing processes very similar to those seen in galaxies in the early universe. This is particularly exciting, because if we want to better understand how galaxies form and evolve over cosmic time, we need to understand how they grew at the earliest times.
The Peas are much closer to us, and can be studied in far greater detail than galaxies in the very early universe and therefore provide a ‘local laboratory’ in which we can study extreme star formation episodes in galaxies.
- How/when did you first get interested in Astronomy?
In college, we were required to take a science class to fulfill a distribution requirement. I chose astronomy because I thought it might be fun, and we wouldn’t be required to handle chemicals. I tend to spill things! I was blown away by how much I loved Astronomy. I studied planets and archeoastronomy (the history of human understanding of astronomy) but when we got to Cosmology, learning about the history of the universe, I was fascinated by how our understanding of the universe is growing and changing as new discoveries are uncovered each year. I finished with the mathematics major and a liberal arts study of astronomy, continued on to Wesleyan University to earn a masters in astronomy, and then to Yale, where I am currently finishing up my PhD.
- What (if any) do you think are the main barriers to women’s involvement in Astronomy?
I’ve never personally felt any discrimination as a female Astronomer. Although I have seen such things in academia, astronomers work in an enormously supportive environment. In my opinion, there are two barriers to a woman becoming an astrophysicist.
The first is very simple: it may never occur to her to study Astronomy. She has to chose take the coursework and show the initiative. I think once a woman has indicated interest in becoming an astronomer, the outpouring of support is overwhelming.
At Wellesley college, I had the encouragement of my professors and other alumnae in the field of Astronomy who were happy to share their experiences with me. I’ve experienced the same encouragement and support at Wesleyan and at Yale. There is never any question that a woman’s work is held in equal regard to that of her male peers.
The second barrier to a woman becoming an astrophysicist comes much later as she is finishing up graduate school and starting her career. An astronomer must spend much of her 20s and 30s moving from institution to institution, completing a graduate degree and a couple of postdoctoral positions before finding a permanent position. If you’re married and thinking about starting a family, it can be very difficult to be this mobile. Additionally, there are numerous problems to consider if both partners are academics, a common situation for female astronomers.
- Do you have any particular role models in Astronomy?
I have numerous role models in Astronomy. Currently I work with Meg Urry who is a wonderfully supportive advisor and an outstanding example of what a woman can achieve in the field of astronomy. I also admire others here at Yale including Priya Natarajan, a innovative scientist who studies cosmology and a gifted mentor in her own right. Ed Moran, with whom I worked at Wesleyan University, is also a talented teacher and scientist who comes up with new and creative ways to approach scientific questions.
- What do you think is the most interesting astronomical question Galaxy Zoo will help to solve?
Galaxy Zoo will be able to shed new light on the role galaxy morphology, or shape, plays in galaxy evolution. Also, the attention to detail a million amateur astronomers can pay allows them to uncover new and curious objects like the ‘Peas’. Who knows what else might be uncovered by these dedicated volunteers!
This post is part of the ongoing She’s an Astronomer series on the Galaxy Zoo Blog is support of the IYA2009 cornerstone project of the same name (She’s an Astronomer). We are now listed on the She’s an Astronomer website in their Profiles.
This is the fourth post of the series. So far we have interviewed
- May 1st 2009: Hanny Van Arkel (Galaxy Zoo volunteer and finder of Hanny’s Voorwerp).
- June 1st 2009: Dr. Vardha Nicola Bennert (researcher at UCSB involved in Hanny’s Voorwerp followup and the “peas” project)
- July 1st 2009: Alice Sheppard (Galaxy Zoo volunteer and forum moderator)
Still to come in the series – more Galaxy Zoo volunteers and researchers, including original team member Dr. Kate Land, forum moderator Gemma Coughlin and many others.
How big is the Galaxy Zoo collaboration now?
Every once in a while, usually at the summer AAS meeting, the Zookeepers like to play a game called “How big is our collaboration now?” Last time, it was inspired by Chris and I attending a baseball game in St. Louis, and realizing that there were enough Galaxy Zoo volunteers to fill the stadium three times over. That led us into a discussion of “what else are we bigger than”?
Today, the Galaxy Zoo collaboration has 230,000 volunteers. How does that compare?
