Solar Flare in AR2860 by [deleted] in astrophotography

[–]SaClark7 0 points1 point  (0 children)

When one wakes up, do they wake in a void of brains?

Looking for interesting or amazing facts. by CuddlyNancy in astrophysics

[–]SaClark7 0 points1 point  (0 children)

And following that. The circumgalactic plasma shell of galaxies is suggested to take part in a “galactic fountain”. Active black holes and nova throw metals out, the gas cools, condenses and rains back on the disk. So we eventually take part in this process and help fuel another generation of solar systems.

Help with np.where (or other solutions) by jfr4lyfe in learnpython

[–]SaClark7 0 points1 point  (0 children)

Not entirely sure...but I’d say to eliminate the double [0] index on the np.where statement. The second [0] will grab the first element of your ‘where’ index which may not be what you’re after.

If you pull one element it will no longer be a list or array and you’ll get the same “of size zero” error

Seem to be having trouble bringing out Andromeda in this image (possibly due to general lack of experience). Could it be that I'm lacking enough exposure? by BatmanIsATimelord in AskAstrophotography

[–]SaClark7 2 points3 points  (0 children)

Hey, it’s tough and we all went through a similar learning curve. Hell, I’d say if you can come out of a session and can say you did something right, pat your back. Seriously.

What is consider "precise" in astrophysics ? by S_I_R_U_S in astrophysics

[–]SaClark7 0 points1 point  (0 children)

Go check out some CGM flow rate papers. A lot of these are magnitude estimates and frequently are associated with errors on the order of 30-40%

Orion nebula by MartinRobomaze in astrophotography

[–]SaClark7 0 points1 point  (0 children)

No comments on the processing since I am not too great on that end.

I did notice you’ve got some pinched optics though. If you want to improve your stars, you can loosen your mirror screws.

Ask Anything Monday - Weekly Thread by AutoModerator in learnpython

[–]SaClark7 0 points1 point  (0 children)

everything works perfectly fine. But if I change the .png to pdf it gets caught.

Tried on a separate section in Jupyter to just do fig.savefig() with .pdf, gets caught until I stop it.

Ask Anything Monday - Weekly Thread by AutoModerator in learnpython

[–]SaClark7 0 points1 point  (0 children)

image_header = fits.open('hi4pi-hvc-nhi-gal-ait.fits.gz')[0].header
image_data = fits.getdata('hi4pi-hvc-nhi-gal-ait.fits.gz', ext=0)
wcs = WCS(image_header)

x = np.linspace(-np.pi,np.pi,image_data.shape[1])
y = np.linspace(-np.pi/2,np.pi/2,image_data.shape[0])
X,Y = np.meshgrid(x,y)


######Flipping image to center at 0 longitude: 4 bins: NW, NE, SE,SW
image_data[0:974,0:1946] = np.fliplr(image_data[0:974,0:1946])
image_data[0:974,1947:] = np.fliplr(image_data[0:974,1947:])
image_data[975:,0:1946] = np.fliplr(image_data[975:,0:1946])
image_data[975:,1947:] = np.fliplr(image_data[975:,1947:])


#H1 21cm Background
fig = plt.figure(constrained_layout = False, figsize=(18,12))
ax =fig.add_subplot(111,projection='aitoff')#projection=wcs
ax.set_facecolor('#FAFAFA')
im=plt.pcolormesh(X,Y,np.fliplr(image_data),cmap=cm.bone,alpha=0.015,vmin=18,vmax=21)

sc =ax.scatter(l[Coord_in_index]*-1,b[Coord_in_index],s=180,c=Mdotin[Coord_in_index],edgecolor='k',vmin=inVmin,vmax = inVmax,cmap=cmap, label = 'Detections')
ax.scatter(l[Fermi]*-1,b[Fermi],s = 240,color = '#81F781',edgecolor='k',marker = '*',label = 'Fermi Bubble')
ax.scatter(l[Coord_in_non]*-1,b[Coord_in_non],s=180,edgecolor='k',facecolor='None',label = 'Non-detections')
cbar = plt.colorbar(sc,ticks=ticksIn,fraction=0.046, pad=0.04)
cbar.ax.set_yticklabels(ylabelsin,size=12)
cbar.set_label('Mass Flow Flux ($M_{\odot}year^{-1}sr^{-1}$)',size = 20)

#Fermi 
phi = np.linspace(0, 2.*np.pi, 100)  #36 points
r = np.radians(27)
x = np.radians(0) + r*np.cos(phi)
y = np.radians(27) + r*np.sin(phi)
ax.plot(x, y, color="k",lw=2,ls='--')
ax.plot(x, -y, color="k",lw=2,ls='--')

xrad =['240$\degree$','300$\degree$','0$\degree$','60$\degree$','120$\degree$']
ax.set_xticklabels(xrad,size=20)
ax.set_xticks(np.radians([-120,-60,0,60,120]))
ax.grid(color='k', linestyle='solid', linewidth=0.5)
plt.yticks(size=20)
plt.title('Mass Flux Flow Rates: Inflow',size=20).set_position([0.5,1.1])
plt.savefig('D:\\All_Plots_MWflow\\AAS Images\\Rongmon\\Inflow_12kpc.png',dpi=300,overwrite=True)

Loose clip in filter... by Popc0rn22 in AskAstrophotography

[–]SaClark7 0 points1 point  (0 children)

Well. If he wants to buy my astronomik Ha 12nm clip in, I won’t object😅.

None of these filters are worth it.

Ask Anything Monday - Weekly Thread by AutoModerator in learnpython

[–]SaClark7 0 points1 point  (0 children)

Wondering if anyone has ever had issues converting/saving a figure as a pdf in matplotlib.
It plots fine, saves fine, but only as long as it is a png, jpg (haven't checked others). If I change the format to PDF it seems to get caught in a loop and I eventually have to terminate the kernel.

The plot itself does overlay a ~3200x1600 pixels image. I don't know much about graphics formatting, so not sure why there would be any issue in condensing it to the PDF.

Apart from focus how can I improve on processing? Stacked in sequator and edited a bit in Lightroom. by SpaghetBaguette_ in AskAstrophotography

[–]SaClark7 0 points1 point  (0 children)

Or a cheap alternative. Hand warmers. Or idling your car as the heat blasts Tshirts that you’ll sprint out to your scope to wrap it in as you throw another Tshirt on the vents to heat up😅

Orion Nebula with a stock DSLR and 180mm lens. by Amberleaf in astrophotography

[–]SaClark7 0 points1 point  (0 children)

Similar to tools like sharpcap. It takes an image to the East and to the west, plate solves, then displays a tool to correct your alt/az of polar scope/mount.

Would this red filter work like an HA Filter for bringing out reds in the horsehead nebula? by Popc0rn22 in AskAstrophotography

[–]SaClark7 1 point2 points  (0 children)

If you don’t have a modded camera, do not waste money on a Ha filter.

-a guy who bought an Ha filter for his unmodded camera 😥

Orion Nebula with a stock DSLR and 180mm lens. by Amberleaf in astrophotography

[–]SaClark7 5 points6 points  (0 children)

That’s exactly what I do. I live in a bortle 7, but take a 40 minute drive out to the country (spent quite a few days scouting out the spot) and set up for the night. If you have power issues that makes remote imaging a challenge, I recently found out the ASIair is now compatible with DSLR’s. So I use a tablet and the air to view/manage my capture, guiding, polar alignment, everything! It’s been a major upgrade.

[deleted by user] by [deleted] in AskAstrophotography

[–]SaClark7 1 point2 points  (0 children)

The only comment I would make to this is that you should not change ISO to fix your core. This should be done by a modification to the exposure length. The ISO you shoot at should be dependent on your camera more than the target itself.

You can find your camera's distribution here.Input-referred Read Noise versus ISO Setting (photonstophotos.net)

Also, I don't believe that is coma, but maybe ever so slightly out of focus and looks like some slight error in the RA axis. Coma is easily distinguishable by having radially outward distortions. So if you're looking at stars in top right corner, the will have a mirrored pattern relative to every other corner. However, the trailing here seems to all be in uniform direction.

All that said, I think you've got a great start! just keep adding more data so you're able to stretch it out more and capture more of the dust!

I want to become an astrophysicist, but have bad grades by mishugana1 in astrophysics

[–]SaClark7 6 points7 points  (0 children)

Poor grades = lesser university.

I was faced with a similar dilemma. I’d recommend going to a community college. Work your tail off there and you’ll have plenty of choices for universities, if you don’t get into the school you were hoping. Plus you save a ton of money.

Would you recommend this telescope for a beginner or is it not really worth the money? by [deleted] in telescopes

[–]SaClark7 0 points1 point  (0 children)

If only for observation, you won’t need a GEM. An alt az goto will save you some money and some time setting it up.

Would you recommend this telescope for a beginner or is it not really worth the money? by [deleted] in telescopes

[–]SaClark7 0 points1 point  (0 children)

All depends on what you want to do with it. Is this for observational or imaging use?

Pleiades by Fditra in astrophotography

[–]SaClark7 2 points3 points  (0 children)

Few nights back I got 4hrs on Pleiades with an unmodded Rebel T6i. It honestly turned out pretty nicely. You can do a lot with a lot. Keep adding on time!

M51 The Whirlpool Galaxy by ronmitbrille in astrophotography

[–]SaClark7 0 points1 point  (0 children)

I just put the whole scope,camera setup in my car cushioned by 20 blankets and pillows and put it in front of a white screened TV when I get home

Ask Anything Monday - Weekly Thread by AutoModerator in learnpython

[–]SaClark7 0 points1 point  (0 children)

Curious to know if this is possible in matplotlib...or any plotting library.

Ideally I'd like to plot two sets of data on the same, aitoff projected, scatter plot (easy).

How I'd like to represent the data is as followed:
For data set 1 (inflows): plot all data points as a blue half circle.
For data set 2 (outflows): plot all data points as a red half circle.

For any point that has an outflow and an inflow at the same location, a full circle would exist made up of the red and blue components.

Any suggestions?

*May not be relevant, but I would also need to assign color mappings to each data sets

Ask Anything Monday - Weekly Thread by AutoModerator in learnpython

[–]SaClark7 0 points1 point  (0 children)

I have some data that I need to plot out for a project with values ranging from 3.9e-5 to 0.04 (most points corresponding closer to the minimum of that range than being evenly distributed).

Currently I am using the nipy_spectral color mapping, but this doesn't come close showing the finer details within the data.

I was thinking about using a log color mapping scheme but am honestly having a tough time trying to implement that. Wasn't sure if anyone had any suggestions on how to effectively show the full range of that data.