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Showing posts with label astronomia. Show all posts
Showing posts with label astronomia. Show all posts

Friday, 29 November 2013

The Comet is Dead - Long live the research

This evening I shared with other members of the CIOC_ISON group the loss of a comet that did not live to see whether it was to be the Comet of the Century, a label promoted by the Media, rather than those who have spent many months of their lives following its progression in its orbit which it thought started in the Oort Cloud only to see it destroyed when it came close to the Sun.

We joined, with many others, the NASA ISON Google Hangout watching the progress of the comet through the use of a number of space telescopes including SOLO and STEREO.

When the Hangout finished we all drifted off - many to Thanksgiving Meals - with many giving a silent toast to this comet that had become part of our lives. Some will feel that they have lost a friend, others will feel that along with a hole in their lives.

There still remains something, but whatever there is can be no more than a ghost of the comet. there will be the dust thrown off and maybe some small fragments. I, along with others, will be trying to image this ghost in a week or so, but even if we are successful they will not be the images we had all hoped for.

ISON may be gone, but the work has not finished. The many observations of ISON are there for further research to take place because in its journey towards our Sun and its dying our understanding of our Solar System will be better understood.

I will certainly be examining the images taken, starting with the days leading up to the image I took of the disruption on the morning of the 13th of this month.



  

Was this the start of something that the Sun on gave the final blow. I do not know, but I am think that this is an area that needs questioning. It was only two days later when something else happened.





These are quite extreme changes - say I with so limited an experience in this area. Soon after it changed again - settling down?



Now these are just three of many images of ISON that I have taken during the past weeks. I am just one observer amongst many, so there must be thousands of images out there from which a complete illustrated history could be derived.

This is one of the reasons that I am glad that I am able to be part of the CIOC_ISON NASA ProAm Group led by +Padma Yanamandra-Fisher . This is exactly one of the many things that Padma is doing, Creating a timeline of observations that will be held in a database that can then be fully analysed by the ProAm community she has assembled.

The Comet may be dead, but the research and discoveries that will come from the observations will live on long after the general public have forgotten ISON, something of course we will never do.


Wednesday, 13 November 2013

ISON and feeling happy :)

Just woke up from my siesta (well I did make do with just four hours last night) and saw on the CIOC_ISON Facebook Page :

ALERT: images from earlier today: from Tony Angel:
 maybe outburst - please image, take spectra ??
 Thanks Tony for the quick alert.... Thanks, Padma Fisher

CIOC_ISON: is the Pro-Am Collaboration for Support of NASA Comet ISON Observing Campaign (CIOC) via Social Media.

Click here to read Padma's article or visit the NASA Comet ISON Observing Campaign

I do know that I was not the only person to pick this up, but it still feels good :)

Special on ISON - Observation from this morning.

C/2012 S1 ISON . this morning 13/11/2013 at 05:30 GMT SON@OSC 4" refractor F4 ST8

The two tails are like searchlights - both of similar dimensions and brightness (or I might be talking a load of rubbish)

FOV 116.5 x 77.7 arcmins

Please note that this was a quick and dirty process so that anyone who is just about to start their observing run can have an idea what to look for :)



Observations of Tuesday morning 11/11/2013

Written 12/11/2013 started whilst observing.

Not sure which is more stressful; chasing the comets to image before dawn, processing the most interesting images or thinking of what to write on here :)

Certainly chasing the comets is getting more hectic as drop lower in the sky and it becomes a race to beat dawn.C/2013 R1 Lovejoy is bright and high in the sky, in fact I realised after the fact that I need to look at bringing down the exposure time for Lovejoy.  C/2012 S1 ISON is still high enough to get reasonable images, but 2P/Encke and C/2012 X1 Linear are getting quite difficult.  Today will be the last time I will try - if I have time - for a colour image of Encke and Linear.

All images were captured using the SON@OSC Observatory (Searchlight Observatory Network) 4" Pentax F4 Refractor and an ST8 CCD camera

Here are some of yesterday's images.

The t(r)ail on Encke is still very distinct and some 150 arc minutes of it are visible

2P/Encke
2P/Encke

Linear is getting quite faint, especially now dawn approaches. It is still possible to see the what is left from the recent outburst. 

C/2012 X1 Linear
C/2012 X1 Linear

I expect that this will be the final colour image.

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C/2012 X1 Linear

The second tail of ISON was first observed a couple of days ago. This was the first chance I have had to image ISON and capture the two tails.

C/2012 S1 ISON
C/2012 S1 ISON

The two tails of Lovejoy are quite clear. There seems to be, below the other two tails, either a third tail starting or a minor outburst. 
  
C/2013 R1 Lovejoy
C/2013 R1 Lovejoy

I will start the observing report of this morning's observations soon. The tails of ISON have changed so I will want to get an image on here soon. :)









Monday, 11 November 2013

Another tail - this time C/2013 R1 Lovejoy

Just a shot blog today (11/11/2013). As Lovejoy is now the brightest comet in the sky by far I thought I would see if how much of the tail I could image. It was soon obvious that the tail extended beyond the width of the image - some 115 arc seconds, so I took a second and third overlapping images and found that two overlapping images could pick up all the tail capable of being captured by the current SON@OSC set up for wide field imaging - 4" F4 Pentax refractor and an SBig ST8 ccd camera.

The following images are not pretty pictures - the aim is not for beauty but for detail. That is not to say you cannot have both beauty and detail - the images of @Damien Peach belay that idea, however in this instance I needed to really stretch the image to bring out the ion tail.

First Image - showing coma and tail




Second Image - showing tail



Third Image - no tail found



Joined images one and two together.


I have seen one other image that shows the unusual detail in the second image.

Comments are welcome :)

More on Friday Morning's Comets plus Saturday Morning's Comets - that quartet again!

On Friday 08/11/2013 I wrote a little about 2P/Encke and that day's imaging of it. Here are some other images I took that morning.

C/2012 S1 ISON


C/2013 R1 Lovejoy

C/2013 R1 Lovejoy Negative

C/2012 X1 Linear

C/2012 X1 Linear Crop


Saturday morning - 09/11/2013 - covered the Quartet - Again!.

First 2P/Encke. As there was a fair amount on interest in its trail I spent as much time as possible on imaging this before dawn came.

What follows are four versions of the same image. The first is the regular image. The second is the negative. The third is a stretched regular and the fourth a stretched negatve. In the final image you can really see the meandering trail.

2P/Encke

2P/Encke


2P/Encke


2P/Encke

Below is C/2012 S1 ISON.  This is still not developing very much, though I did see an image that was taken 24 hrs after this one and a second tail has now clearly appeared. I will be trying for this tomorrow morning.

C/2012 S1 ISON

C/2012 X1 Linear continues to be fairly bright after its outburst.

C/2012 X1 Linear

C.2013 R1 Lovejoy is really becoming the star of the show. It continues to brighten and is well ahead of ISON. Where as ISON is difficult to see in 10x50 binos, Lovejoy is now being seen with the naked eye.

I used four different method of processing Lovejoy to see if I could bring out more detail. I then stretched each one.

Process 1.



Process 2



 Process 3 



Process 4





All the images were taken using the Searchlight Observatory Network Observatory here in the Sierra Contraviesa, Granada, Spain at an altitude of 4,500 feet. The telescope used is a 4" Pentax F4 refractor and the camera is a SBig ST8 . All the images, with the exception of the cropped Linear are FOV 116.5 x 77.7 arcmins

There was no observing on the morning of Sunday 10th November due to my wife going to England for a week or two. I thought it would not go down too well to open the observatory while she was getting ready to leave :)

In the next blog I will include some objects that are not comets :)