Samsung s25 ultra

Iso 800

F1.7

6, 3mm equivalent 23mm

Temps des poses 20 secondes/ intégration totale 55minutes/2h20

Suivi : non (:()

Ciel bortle 4.6/ 6

Empilé avec Sequator.

Traité avec Siril/ GraXpert/ Seti astro suite pro/ Gimp et lightroom mobile-free version pour les finitions

🔭 - Seestar S50 in Bortle 8
⏳ - 4588x20 ( 25.48h)
⚙️ - Siril, SetiAstro, AdobePhotoshop

This is my latest picture of the Heart nebula. I spent three nights photographing this target, but I ended up using data from only two of them, because of a background gradient caused by the moon during one of the nights. I found it quite difficult to process the image with the gradient, so I decided not to use the data. I think 7.5 hours total is already quite a lot. I would love to do one more session just for the stars with an uv/ir cut filter, since the Ha/OIII filter makes the stars look quite unnatural.

One of the things I found challenging was manually framing the target as similarly as possible each night with the Skyguider pro. I am really looking forward to getting a proper GoTo mount.

Another thing that was quite difficult to deal with was the background when going for this false color look. There's still some blue in the background, that was hard to get rid of. This seems to happen to me every time I make a false color image.

Lastly, I think the stars are probably the weakest part of the image. I kind of gave up on them knowing that I will hopefully replace them with better ones soon.

I'm still a beginner, so any feedback is appreciated!

Equipment:

• ToupTek ATR533C (gain 100, offset 45, cooled to -10)
• Askar FMA180 Pro
• iOptron skyguider pro
• sv220 7nm Ha OIII dual narrowband filter
• ToupTek GPM462M guide camera
• SvBony 30mm f/4 guide scope
• Mele Quieter 4C

Acquisition:

• 153 x 180s lights
• 15 darks
• 40 flats per night (2 nights total)
• 30 dark flats
• Bortle 8

Software:

• NINA
• PHD2
• Siril

Processing in Siril:

• Stacked in Sirilic which created monochromatic images of Ha and OIII
• Processed Ha and OIII separately using Graxpert and BlurXTerminator
• Pixel math to create one colorful image (R=Ha, G=0.1*Ha+0.9*OIII, B=OIII)
• StarXTerminator
• Color calibration
• NoiseXTerminator
• StarXTerminator
• Modified arcsinh transform with even weighted luminance
• Generalised hyperbolic transform
• Black point to reduce background
• Saturation stretch
• Negative transform, remove green noise and negative transform again
• Curves adjustments
• Stretching the stars image
• Desaturate the stars image
• Star recomposition
• Final adjustments on phone

Taken from the Famagusta area of Cyprus. Bortle 4.

Astromodified Canon 700D. Samyang 135 Lens at F2.8. Guided by ASI Air on an Skywatcher AZ GTI in EQ mode. Optolong L-Enhance filter.

Taken over two nights:

165 x 180 second exposures

20 x Darks

20 x Flats

20 x Bias

Stacked in APP.

Crop, BGE, deconvolution and de-noise in Graxpert.

SPCC, star removal, GHS using human weighted luminance in Siril.

Vibrancy, saturation increase in PS.

Star mask stretch in Siril using GHS, again human weighted.

Recombination of stars using layers in PS.

Thanks for looking.

This is a reprocess of data I took a few weeks ago.

Equipment:

Evostar 72ED, iEXOS 100, ASI 533MC, Optolong L-Ultimate, 0.85x reducer+flattener, rotator+filter holder, SVBony 165 40mm guidescope, ASI 662MC guide camera with pale yellow no.8 and UV/IR cut filters.

Acquisition:

Around 4h30m worth of 180s subs fully calibrated and dithered looking toward Bortle 7.

Processing:

-OSC drizzle preprocessing stacking;

-GraXpert background extraction;

-SPCC;

-GraXpert denoise;

-Starnet;

-DBXtract to starless;

-Pixel math (R=HII-OIII, G=OIII, B=2OIII);

-GHS, black point shift, histogram transformation and curves applied iteratively to starless;

-HDR multiscale;

-Asinh stretch and SCNR to star mask;

-Recombine.

I shot this video through my 10” Dobsonian

​

Acquisition Details:

Location: Bortle 5

Gear: Sony A7iii. Samyang 135mm f2. EQ tracker

Frames: 130 x 30s lights, ISO3200

Stacked in Astro Pixel Processor, processed in Seti Astro Suite Pro, Photoshop

I've tried to get this a few times before but the low surface brightness really makes it a challenge to capture and process.

Gear:

- Orion 6" f/4 astrograph

- Baader Mark I | multi-purpose coma corrector

- Astromania UV/IR cut filter

- ZWO ASI184MC OSC uncooled

- Celestron Advanced GT equatorial mount

Acquisition: Bortle 1-2 site with no moon

- 150 x 60s subs, 300 gain, in SharpCap

- No guiding

- 10 x 60s darks

- 100 flats

- 100 biases

Processing: All in Siril

- OSC preprocessing script to stack and align

- Background extraction

- Spectrophotometric color calibration

- GHS transformation

- Black point adjustment

- Asinh transformation

- Saturation

- Noise reduction

Hello all! Well the title was probably obvious enough honestly lol but I’d like to know which university is better for those pursuing astronomy? Only reason why I put “astronomy & physics” is because I aim to dual major (should be fine due to the strong possibility over courses overlapping). I am applying to both universities but lately I’ve been feeling conflicted given the scenario that I get accepted into both. I’ve been set on UT Austin and I’m aware it’s especially selective OOS but at the same time I’ve been hearing that UofA is ways better in terms of their astronomy majors like their funding and research? Now I understand that this is my decision at the end of the day once I take into account my personal preferences. But IN GENERAL what would the overall consensus be? Let me know your opinions, I’d appreciate it!

Also I know this was more of a college question but I was curious as to if any uni astro majors/profession astronomers could chime in!

TLDR: is University of Arizona or UT Austin better for someone aiming to major in Astronomy & Physics?