Latest Work

Hello, I am trying something new with my website. I mostly tend to my Flickr gallery at this point, so to reduce the upkeep and redundancy, I am using the Flickr API to pull my latest images straight from my gallery over there. Clicking on any image will simply take you to its page within my Flickr gallery (external link).

A categorical listing of work, separated into albums, is located here (external link).


NGC 2336

NGC 2336

Recent observations revealing the many-armed, beautiful spiral galaxy NGC 2336 as only Hubble can. The imagery used to create this image was taken in January 2020. Meanwhile, the Chandra X-ray Observatory is also tasked with looking at this galaxy, though I haven’t looked into the details of that, yet.

Edit: Checked on CXO observations, and so far none yet, but I did notice that of the proposed 200 kilosecond time, they only gave Dr. Antoniou 50 ks. Ouch! Here’s hoping that’s enough.

Data from the following proposal was used to create this image:
Determining How X-ray Binary Populations Vary Through Time

Note there are a number of blank areas in the image where data were absent. I filled those with background-matched noise to make them visually unobtrusive. Some other areas also lack a full range of color, being only covered by 1-2 filters.

The pixel scale is 0.05 arcseconds per pixel.

Red: ACS/WFC F814W
Green: ACS/WFC F555W
Blue: ACS/WFC F435W

North is exactly to the right.


NGC 6684

NGC 6684

Not quite elliptical, not quite a spiral… it’s lenticular. Love these subtle, ghostly galaxies. Very little dust or star formation to speak of, leaving the stellar structure plainly visible, though highly diffuse.

Data from the following ambitious proposal were used to create this image: Every Known Nearby Galaxy

Red: ACS/WFC F814W
Green: Pseudo
Blue: ACS/WFC F606W


Quadruply Lensed Quasar 2M1310-1714

Quadruply Lensed Quasar 2M1310-1714

The same quasar seen in four separate instances due to the effect of the foreground mass intervening between the viewer and the quasar, causing distorted light paths, otherwise known as gravitational lensing.

Data from the following proposal were used to create this image:
H0, the stellar initial mass function, and other dark matters from a large sample of quadruply imaged quasars

Pixel scale is 0.0396 arcseconds per pixel.

WFC3/IR F160W was used as a "screen" layer for both the green and blue channels.

Red: WFC3/IR F160W
Green: WFC3/UVIS F814W
Blue: WFC3/UVIS F475X

North is up.


C/2020 F3 (NEOWISE) Coma with Subtraction Model

C/2020 F3 (NEOWISE) Coma with Subtraction Model

2020 Aug 03: Phil Plait wrote a bit about this in his newsletter: badastronomy.substack.com/p/ban-241-climate-irony-goodbye…

Data originally collected by William C. Keel on 2020 July 24 using the Jacobus Kapteyn 1m telescope with SARA. He’d already done the work of flat fielding and stacking the exposures in r, v, and b bands, and asked if I’d like to take a shot at processing it further.

At first I was interested in the faint striations already visible in the tail, but later I discovered a kind of spiral emanating from the coma. Initial attempts weren’t pretty, and had a lot of introduced artifacts. At some point I realized I could use the same kind of subtraction model I’ve used in the past for elliptical galaxies to take away excess light in a uniform pattern, which brings out structures that do not match that uniform pattern.

The spiral pattern was most apparent in the b band, mostly visible in the v band, but almost completely gone in the r band. Because of this, I went ahead and used color data from the normal, non-subtracted RVB image, and luminosity from just the model-subtracted b band.

I did use some rather heavy noise reduction in the darker parts of the image, but noise reduction was not necessary for the brighter parts. I tried to make the noise appear uniform. Some small columns of missing data created by a dead or hot pixel were cloned out to the lower right within the coma.

Future reference for self: The curve you need to start with for comets is 1/x (with many thanks to Bill for figuring this out for me)

Pixel scale is 0.34" per pixel

Luminosity: model-subtracted b band
Red: r band
Green: v band
Blue: b band

North is up.


Jupiter 2019 July 21

Jupiter 2019 July 21

Some of the latest Jupiter data from the HST joint observation program for the Juno probe. Jupiter here in nearly RGB filters; the equatorial limb areas look a tad bluer than they normally would because the blue channel is a near-uv filter. This also makes the Great Red Spot and some of the cloud bands look a little redder.

Ganymede was in the frame, but hiding invisibly in Jupiter’s shadow.

This image represents Jupiter as it would have appeared on 2019-07-21 at 14:05:03 UTC.

This image was made thanks to data collected for the following proposal:
Wide Field Coverage for Juno (WFCJ): Jupiter’s 2D Wind Field and Cloud Structure

Red: WFC3/UVIS F631N (id9o45cwq)
Green: WFC3/UVIS F502N (id9o45cvq)
Blue: WFC3/UVIS F395N (id9o45cuq)

North is up.


NGC 6302 with [Fe II] Emission

NGC 6302 with [Fe II] Emission

New observations from 2019 (Prop 15953/Joel Kastner) reveal [Fe II] emission, shown here in pink, along the edges of the biopolar outflows of this young planetary nebula. I created this image specifically to clearly detail this discovery, deliberately arranging filters and assigning colors that would draw one’s eyes to the new emission line data.

Hat tip to Bruce Balick for his original idea of removing the stars in the [Fe II] data. Through a strange series of emails I ended up "stealing" this idea, but he seemed happy about it when confession time came.

Data from the following proposals were used to create this image:
WFC3 ERO: Planetary Nebula
Young and Rapidly Evolving: a Panchromatic WFC3 Imaging Study of the Planetary Nebulae NGC 7027 and NGC 6302

Note that stars were manually removed from the F164N/[Fe II] data.

Red screen: F164N ([Fe II])
Red: F673N
Yellow-Green: F658N
Blue: F373N

North is 35.20° clockwise from up.


RAFGL 5180

RAFGL 5180

Gazing into deep this dusty maelstrom using near-infrared filters, Hubble reveals many stars and star-forming activities that might otherwise be obscured by dust. Strongly red spots indicate [Fe II] emission. There are only a few tiny splotches of those. Make of that what you will.

Data from the following proposal were used to create this image: Peering to the Heart of Massive Star Birth

Red: WFC3/IR F164N
Cyan: WFC3/IR F160W
Blue: WFC3/IR F110W

North is 45.51° counter-clockwise from up.


NGC 7764A

NGC 7764A

Another collisional mess from Julianne Dalcanton’s voluminous interacting galaxies program. The weird galaxies to the right are supposed to look like a Star Trek ship, but I’m not sure I see it. Definitely one of those things that goes away after more than a glance. At this point I think it looks like someone tossing a pizza dough.

Establishing HST’s Low Redshift Archive of Interacting Systems

All Channels: ACS/WFC F606W

North is 1.45° clockwise from up.


NGC 7023

NGC 7023

A close up view of a section of NGC 7023, also known as the Iris Nebula. Off the top frame, the star HD 200775 shines brightly, illuminating the nebula with blue light. This view includes near-infrared light, revealing the reddened light of stars attenuated by their dusty environment. Red and brown hues represent light shining through dust, while blue represents light reflecting from dust and gas.

Data from the following proposal were used to create this image:
The Exciting Wavelength of Extended Red Emission

Red: ACS/WFC F850LP
Green: ACS/WFC F625W
Blue: ACS/WFC F475W

North is 169.96° clockwise from up.


IRAS 17340-3757

IRAS 17340-3757

Mindlessly trying to waste some time lately by browsing for anything classified as a reflection nebula in the archive lately. This one is apparently a preplanetary nebula with the typical bipolar structure. Interestingly, the knots and linear formations seem fuzzier than other preplanetary nebulas I’ve processed. Not sure what that means if anything.

Data from the following proposal were used to create this image:
When does Bipolarity Impose itself on the Extreme Mass Outflows from AGB Stars? An ACS SNAPshot Survey

I removed the occulting finger by using the content-aware fill tool (smart data cloning).

Red: ACS/HRC F814W
Green: Pseudo
Blue: ACS/HRC F606W

North is up.


There are more pictures at my Flickr Gallery (external link)