ARP 273 (Carl Weber)

ARP 273

My four month old ASI1600 is having problems so I am without a camera (again). In the meantime, I decided to try and process Hubble Space Telescope images. This is my first attempt at doing so.

The first hurdle to overcome was deciding which files to grab. HST apparently has hundreds of filters in their filter wheels. There are multiple 48 slot wheels holding a variety of filter colors. Add that, there are several filter slots that have their own filter wheels containing 5 more filters. It’s nuts! They are not labeled like our filters (that's too easy apparently) so no SII, Ha, or OIII. For example it's HST_MOS_1014131_wfc3_uvis_f600lp_drz.fits In HST language this means Red.

The raw Fits files were downloaded from the HST Archive and converted into Tiff files. I then processed the set the same way we do our own images in PixInsight and Photoshop.

I am amazed that the public can access and do our own thing to the data. Of course I've seen other images that amateur astronomers have done, but I never thought I could do it too!!

This image to me doesn’t even look real. The thing I really noticed about this image is the depth of scale. Wow, there are galaxies galore everywhere including two really nice face on spirals seen through ARP 273.

6400 sec Red

6400 sec Green

9600 sec Blue

Total exposure time of 3.5 hours

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic failed
Started	...
Astrometry.net job	4618790
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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ARP 273

ARP 273

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ARP 273

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