Category Archives: Astrophotography

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Eta Carinae and the Keyhole Nebula

Eta Carinae and the Keyhole Nebula

Diffuse gas and dust in the heart of the Carina Nebula. The bright star is Eta Carinae, a massive double star at the end of its live that will soon explode as a supernova. The “Keyhole” is the dark cloud in the centre of the image.

Image obtained as part of the “ABC Stargazing Live” events at Siding Spring Observatory (NSW, Australia), 4 – 6 April 2017.

Data taken on 3rd April 2017 using the CACTI camera in 2dF at the 3.9m Anglo-Australian Telescope. Color image using B (12 x 60s, blue) + [O III] (12 x 60 s, green) + Hα (12 x 60 s, red) filters.

More sizes and high-resolution image in my Flickr.

Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory and Macquarie University), Steve Lee, Robert Patterson & Robert Dean (AAO), Night assistant at the AAT: Wiston Campbell (AAO).

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Milky Way rising, LMC, and AAT

Milky Way rising, LMC & AAT

Milky Way, Large Magellanic Cloud, and Anglo-Australian Telescope. Combination of. 6  frames, each of 30 seconds, CANON EOS 5D Mark III, 16mm, f/2.8, ISO 1600. Thursday 2 March 2017. The dome was illuminated in one of the frames by a car leaving the building.

More sizes and high-resolution image in my Flickr.

Credit: Ángel R. López-Sánchez (AAO/MQU).

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Crescent Moon and AAT

Crescent Moon and AAT

The Anglo-Australian Telescope (AAT, Siding Spring Observatory, NSW, Australia) is ready for another night observing with the SAMI instrument. A crescent Moon is seen towards the west through the opening of the dome.

Photo taken using a CANON EOS 5D Mark III, 0.6 seconds integration, 70mm lens at f2.8, 400 ISO, Thursday 2nd March 2017, 8pm AEST.

More sizes, including highest resolution image, in my Flickr.

Credit: Ángel R. López-Sánchez (AAO/MQU).

Supernova remnant NGC 2018 with CACTI

Last Thursday 24th November I conducted an outreach exercise while supporting astronomical observations at the Anglo-Australian Telescope (AAT). Using the Australian Astronomical Observatory (AAO) Twitter account I asked people to chose one of 4 given object located in the Large Magellanic Cloud (LMC) to be observed at the telescope with the new CACTI camera while we were changing gratings of the scientific instrument, the spectrograph AAOmega. I’ve called the experiment “LMC Little Gems using CACTI”.

We got 193 votes, thank you to all of you who voted and also shared the post! It was quite exciting, particularly the last 30 minutes when, thanks to some of the best science communicators in Spain (and friends), we got +50 votes!

Well, here are the results:

  1. Cluster + nebula NGC 1949: 22%
  2. Globular cluster NGC 2121: 13%
  3. Supernova remnant NGC 2018: 34%
  4. Cluster + nebula NGC 1850: 31%

I must say my favorite was NGC 1949, but NGC 2018 was also a nice choice.

And the final color image of the object you chose to observe at the 3.9m Anglo-Australian Telescope is:

NGC 2018 - Supernova remnant in the LMC Data taken on 24 November 2016 as part of the AAO Outreach Exercise “Large Magellanic Cloud Little Gems with CACTI”. CACTI camera in 2dF @ 3.9m Anglo-Australian Telescope. Color image using B (6 x 10s, blue) + [O III] (6 x 60 s, green) + Ha (8 x 60 s, red) filters. Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory / Macquarie University) & Steve Lee, Robert Patterson & Robert Dean (AAO) Night assistant at the AAT: Steve Lee (AAO).

NGC 2018, a supernova remnant in the LMC Data taken on 24 November 2016 as part of the AAO Outreach Exercise “Large Magellanic Cloud Little Gems with CACTI”. CACTI camera in 2dF @ 3.9m Anglo-Australian Telescope. Color image using B (6 x 10s, blue) + [O III] (6 x 60 s, green) + Ha (8 x 60 s, red) filters. A high resolution image can be obtained here. Credit: Ángel R. López-Sánchez (Australian Astronomical Observatory / Macquarie University) & Steve Lee, Robert Patterson & Robert Dean (AAO) Night assistant at the AAT: Steve Lee (AAO).

I’ve doing a bit of searching to get some extra information about this object. Indeed, the Large Magellanic Cloud has a high star-formation activity, meaning that star-cluster, star-forming nebula but also supernova remnants are all around the place. However, SIMBAD defines NGC 2018 as Association of Stars, and few references to this object to be a supernova remnant are found (e.g., here).

But looking at the image I can say that this definitively is a supernova remnant, yes, with an associated star cluster too (very probably, the sisters of the massive star that exploded as supernova). How? Well, do you see the filament structure seen in the green colour, that traces the [O III] emission? That is related to a supernova explosion, these features are usually not found in star-forming regions… unless you have a recent supernova explosion, as it is this case!

Thank you very much to all that participated on this outreach exercise! I really hope I can organize another experiment like this sooner than later!

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Almost full moon and Sydney Tower

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A 97.8% illuminated moon rises over Sydney on Sunday 13th November 2016. I checked for a nice spot to get the photo of this almost full moon (with a supermoon happening tomorrow) crossing behind the famous Sydney Tower.

The image was taken at 7:15pm Sydney time (8:15 UTC) using my CANON EOS 5D Mark III with a 70-200 mm lens at 200mm, f4.5, 100 ISO and 1/800 seconds. The Moon was at a distance of 355 806 km and had an apparent size of 33.6 arcmin. It was only 17 degrees over the horizon.

More info and high resolution images:

https://www.flickr.com/photos/angelrls/30651527540/

Credit: Ángel R. López-Sánchez (AAO/MQU)

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Perseids 2016 over Teide Observatory

Perseids 2016 over the Teide Observatory. Combination of  25 meteors from the Perseids meteor shower detected in 24 frames. All frames were taken with a CANON EOS 5D Mark III with a Samyang 14mm lens, 30 seconds exposure at f/2.8 and ISO 800. Frames were taken between 0:00 and 2:30 UTC 12 August 2016 from the Teide Observatory (Tenerife, Canary Islands, Spain). The central dome is the Carlos Sánchez Telescope (TCS). The building at the right is the Quijote Experiment. The towers at the left belongs to the Solar Telescopes at site. The dome of the MONS Telescope is seen with some orange light.

The frame taken at 0:36 UTC was used for showing the landscape and the star field. The Moon was up, its light painted the landscape and buildings. In the background some light pollution from Santa Cruz de Tenerife and La Laguna can be seen (orange colours). The light pollution was enhanced because of the existence of dust in the atmosphere.

The estimated ZHR (Zenithal Hourly Rate) using these images is ZHR = 31 meteors/hour.

More info and high resolution images:

https://www.flickr.com/photos/angelrls/27722628870

Credit: Ángel R. López-Sánchez (AAO/MQU)

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Milky Way over the GTC and the TNG

Milky Way over the 10.4m Gran Telescopio CANARIAS (GTC) and the 3.6m Telescopio Nazionale Galileo (TNG), Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain.

Single frame, 15 seconds exposure at 1600 ISO over CANON EOS 5D Mark III, F=33mm and f/2.8. Taken on Wed 3 Aug 2016, 20:35 UTC.

More info and high resolution images:

https://www.flickr.com/photos/angelrls/27722628870

Credit: Ángel R. López-Sánchez (AAO/MQU)