Category Archives: Personal

Back observing at the Anglo-Australian Telescope

On 13th January 2013 the Siding Spring Observatory and the beautiful Warrumbungle National Park near Coonabarabran (NSW, Australia) were terribly affected by the worst bushfire in NSW in the last decade. Although the astronomical facilities have not experienced any severe damage, the bushfire has destroyed some houses at the Observatory (including the Lodge), burnt tens of houses and destroyed the majority of the trees in the National Park.

However, tonight Thursday 14 February, after a month and a day since the bushfire, astronomers are recommencing observing with the 3.9-m Anglo-Australian Telescope at Siding Spring Observatory. I’m one of these astronomers who are now performing the observations remotely from the Australian Astronomical Observatory (AAO) headquarters in North Ryde, Sydney, supported by technical staff at the telescope. The AAO has made public today a press release informing that astronomers are back to work at the AAT!.

The Spindle Galaxy with the AAT. It is an edge-on lenticular galaxy classified as NGC 3155 or Caldwell 53. The data were obtained on 14 February 2013 using the FPI camera of the 2dF instrument at the 3.9m Anglo-Australian Telescope located at Siding Spring Observatory. 8 x 20 s + 5 x 40 s + 1 x 60 s integration time (460 s), combined with IRAF. Colours derived using U, V and I images obtained at the 2.5m Cerro Tololo International Observatory by Kuchinski et al. (2000).
First astronomical observations after the bushfires on 13 January 2013.
Credit: Ángel R. López-Sánchez (AAO/MQ) & Lee Spitler (MQ/AAO),
Night Assistant at the AAT: Steve Chapman (AAO)
.

Although we are using tonight the Two Degrees Field (2dF) instrument with the AAOmega spectrograph, which allows the acquisition of up to 392 simultaneous spectra of objects anywhere within a two degree field on the sky, we have also used the auxiliary camera that 2dF possesses, the Focal Plane Imager, to take some images of the Spindle galaxy, also known NGC 3115 or Caldwell 53, a lenticular (S0) galaxy located at around 32 million light years from Earth.

However, tonight’s observations are having the AAT looking up to a billion light-years out into space to test our ideas about the still mysterious Dark Energy.

Timelapse of the Total Solar Eclipse

Last week I shared some of the images I obtained during the Total Solar Eclipse on 13 / 14 November 2012. It was observed from the Mulligan Highway, 44 km south of Lakeland, Queensland Australia. After spending a weekend playing with the raw frames, I ended up with this timelapse video, which shows all the sequence of the eclipse.

Timelapse video of the Total Solar Eclipse on 13 / 14 Nov 2012. The direct link to YouTube is here. Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory / Macquarie University, Agrupación Astronómica de Córdoba / Red Andaluza de Astronomía).

The video combines 1203 individual frames obtained while the eclipse was happening. As before, I used my refractor Skywatcher telescope, 80 mm aperture and 600 mm focal, and my digital camera CANON EOS 600D at primary focus. For all partial phases but the totality I used a solar filter which blocks the 99.9997% of the incident light. The approximate field of view of the video is 2ºx1º. I usually took a frame each 6 seconds, but sometimes I triggered many consecutive images to improve the quality of the final photo of that moment. The music is the theme “WorldBuilder” written by Fran Solo and included in Epic Soul Factory Xpansion Edition.

Total Solar Eclipse 13 / 14 Nov 2012

After many years waiting for it, I have finally observed (and enjoyed!) my very first Total Solar Eclipse. It was on 14 November 2012 (still 13 November following time in UT) and I was 45 km south of Lakeland, Queensland Australia (I had to drive during the night trying to escape from the clouds in the coast near Port Douglas). Here you have some of the images I have obtained of this rare phenomenon.

My sequence of the Total Solar Eclipse on 13 / 14 November 2012, 50 km south from Lakeland, Queensland, Australia. I used a Skywatcher D 80mm, F 600mm, primary focus using CANON EOS 600D. All times given in UT and correspond to 13 Nov 2012. Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory / Macquarie University, Agrupación Astronómica de Córdoba / Red Andaluza de Astronomía).

Some more pictures:

The sun rises, but the eclipse did already start. Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory / Macquarie University, Agrupación Astronómica de Córdoba / Red Andaluza de Astronomía).

Image of the totality showing the brightest areas of the solar corona and some solar prominences close to the lunar limb (in red). Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory / Macquarie University, Agrupación Astronómica de Córdoba / Red Andaluza de Astronomía).

Image of the totality showing the diffuse solar corona, but the brightest areas are overexposed. Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory / Macquarie University, Agrupación Astronómica de Córdoba / Red Andaluza de Astronomía).

Diamond ring, the first light of the Sun coming after the totality. Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory / Macquarie University, Agrupación Astronómica de Córdoba / Red Andaluza de Astronomía).

HDR (High Dynamic Range) image combining 20 individual frames with different exposition times. Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory / Macquarie University, Agrupación Astronómica de Córdoba / Red Andaluza de Astronomía).

From “El Lobo Rayado” to “The Lined Wolf”

Ángel R. López-Sánchez and the 2dF instrument at the 3.9m Anglo-Australian Telescope. Credit: Ella Pellegrini (Daily Telegraph).

Ángel R. López-Sánchez and the 2dF instrument at the 3.9m Anglo-Australian Telescope. Credit: Ella Pellegrini (Daily Telegraph).

Welcome to my new blog!

My name is Ángel R. López-Sánchez. I’m a Spanish astrophysicist working at the Australian Astronomical Observatory (AAO) and in the Department of Astronomy, Astrophysics and Astrophotonics of the Macquarie University (Sydney, NSW, Australia). My research in Astrophysics is focused in the analysis of star formation phenomena in galaxies of the local Universe, especially in dwarf starbursts and spiral galaxies, but using a multiwavelength approach.

In 2003, while starting my PhD thesis at the Instituto de Astrofísica de Canarias (IAC, Canary Islands Institute for Astronomy, Spain) I decided to create a blog about Astronomy to share with Spanish speakers my interests about this fascinating science. That was the birth of my blog El Lobo Rayado. I chose this title because in that moment I was analyzing a very interesting class of starburst galaxies, the so-called Wolf-Rayet galaxies. A bad translation from English to Spanish of Wolf (which means Lobo) and Rayet (which does not have a translation into Spanish, but it sounds like Lined) seemed a very original title for a blog about Astronomy, furthermore considering that then I was spending a lot of time analyzing optical spectra of galaxies showing many emission lines. In 2003 blogs were not as common as they are today, and I can say that El Lobo Rayado was one of the very first (if not the first) Spanish blogs fully dedicated to Astronomy and Astrophysics written by a Spanish astrophysicist.

I got my PhD in Astrophysics in December 2006. I presented a detailed analysis of a sample of Wolf-Rayet galaxies, the majority of the optical and near-infrared observations were obtained by myself using the telescopes available at the Spanish astronomical observatories of El Roque de los Muchachos (La Palma), Izaña (Tenerife) and Calar Alto (Almeria).

In 2007 I moved to Australia to work at the CSIRO Astronomy and Space Science (then just known as Australia Telescope National Facility) as radio-astronomer. Actually, I’m a weird mix between an optical and a radio astronomer, although I’m also using data from other wavelenghts. Indeed, I’m combining ultraviolet, optical, infrared and radio data to characterise the physical and chemical properties of galaxies and get clues about their nature and evolution. Since January 2011 I’m working at the Australian Astronomical Observatory (AAO) and Macquarie University (MQ) in Sydney (NSW, Australia).

My passion for Astronomy actually started when I was a kid, in the mountain ranges near my natal city, Córdoba (Spain), when I became an active amateur astronomer. Since 1991 I belong to the Agrupación Astronómica de Córdoba (AAC, Córdoba Astronomical Association). Besides being now a professional astronomer, I still feel like an amateur astronomer and indeed I enjoy a lot observing the sky with my eyes, binoculars or small telescopes and taking astronomical pictures using my own equipment.

I consider that outreach and publicizing Astronomy to the general public is very important and I’m usually involved in these activities. That is the reason I created both El Lobo Rayado and The Lined Wolf.

However, The Lined Wolf is not just a translation of El Lobo Rayado. Actually, I’m NOT going to translate a single post from one blog to the other. They will be complementary tools: I’ll continue writing in Spanish in El Lobo Rayado, as I consider it is very important to reach non-English speakers: the majority of the astronomical information, including press releases and hot news, is in English, and hence non-English speakers can still found some extra information about the most recent news about Astronomy in El Lobo Rayado. On the other hand, in the last few years I’ve been thinking it is also important for me to create my own blog about Astronomy in English. However, in this case my idea is to publicize my own research and explain the scientific papers I’m publishing, together with some of the adventures which involves to be a professional astronomer (observations in remote telescopes, conferences, workshops…). That is the aim that the blog The Lined Wolf has.

That also means I have to start from the beginning. There are many posts I still have to write here, just considering I’ll need at least a post per paper published in a refereed journal, plus posts showing some of my beautiful multiwavelength images. Shall we begin?