Re: [Astrometry] Digest for astrometry@googlegroups.com - 1 update in 1 topic

[Paul Leyland]

Get hold of a good FITS image viewer and display the solved image with it. I really like ds9. Watch the displayed coordinates change as you move the cursor around.

Your image failed to attach, or I would have found it for you.

An alternative is to go to https://aladin.u-strasbg.fr/AladinLite/ and type in the coordinates. The purple cross marks the spot. Zoom in until the image scale is roughly the same as in your image and then eyeball the star patterns. The SN won't be in Aladin but the surrounding starfield will be. The SN seems to be 1/3 the way up the left edge of a distinctive quadrilateral of brightish stars and slightly below the median line of the galaxy.

Good luck.

Paul

On 11/05/2022 11:34, astro...@googlegroups.com wrote:

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• Object Identification - 1 Update

Object Identification

Zef <huze...@gmail.com>: May 10 12:44PM -0700 Hi, I've got some images of M82. I'm trying to identify a specific object in the image, SN2014J, to create a light curve plot of, as part of a photometry project. I'm using AstroImageJ. Every tutorial I've watched, the RA and Dec are visible with the images, but when I open up my images, this information isn't shown. I'm unsure why that is, and I also can't identify the object in the image to use as a reference. I know the supernova has RA 09:55:42.139 and Dec +69:40:26.00, but I don't know where in the image it is. I've attached one of the reduced images I'm using. Any help would be greatly appreciated!   [image: M82.png]

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[John Murrell]

In fact if you load the SN catalogue in Aladin over the M82 image you can see where it was ( and 2004an and 2008iz). The SN catalogue dies not contain all the latest SN. You can also load the TNS Alerts catalogue that will show recent discoveries ( that have been notified to TNS not all surveys do).

John Murrell

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