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12/31/2021

19 Comments

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19 Comments

Ehsan

6/5/2018 04:28:08 am

Ask your questions here ....

Pascal

6/21/2018 11:00:43 pm

Hello,

Is-it possible to present a dashboard with the RMS (average) of pro and ama along the time ?

With a bad rms 4.5-4.8, are our work usefull for you ?

Thanks

Ehsan

6/22/2018 02:25:13 am

This is a good idea, however to calculate RSM values as a function of time, we need to have many galaxies with at least 3 different measurements (as a reference point), and many galaxies measured by you at each time interval. Otherwise, any plot would not have enough statistics to be valid. Unfortunately, this would be only possible at the end of the project.

Yes, RSM values less than 5 degrees are still acceptable, as long as all points are not below or above the solid equality line. In another word, you results should not be biased towards low or high inclinations are any inclination value. It's normal if points are more scattered, they should not be shifted in any preferred direction. Also it's normal to have large scatter at smaller inclinations values, where users make more mistakes and their eyes are less sensitive. You can make smaller scatter by just spending more time. There is always a compromise.

Pascal

6/21/2018 11:14:08 pm

Hello

Is it possible to give a name of diagram with the date of the day ?
Now we obtain by example 55_pascal..._20180517_scatter.png or 55_pascal...._20180517.png when we save as the image.

Thanks

Ehsan

6/22/2018 02:09:13 am

Hi,

Changing the name of diagrams based on the current date or the last updates is a bit tricky (since they are produced and called by different set of codes on the server), it's hard but not impossible. In the future these diagrams would be more interactive and easier for users to dealing with. For that reason, I chose to stick with the easiest version for now. If you'd like, until then please change the name of diagrams on your computer as you wish for your own records.

Pascal

6/21/2018 11:36:07 pm

Hello

On scatter diagram, there are more galaxies near the high inclinaison than 45.
Is this a strategy of choice of objects to evaluate ?

Thanks

Ehsan

6/22/2018 02:13:42 am

Hello,

Yes, more edge-on galaxies (inclinations close to 90) are more preferred for this project, because the uncertainties in distance measurements for such galaxies is smaller. In another word, any error we make on measuring the inclinations would have smaller effects on the final measured distance uncertainties.

Practically Tully-Fisher relationship, (the relationship between absolute luminosity and HI profile lien-width) for distance measurement, works better for more edge-on galaxies.

Pascal

7/12/2018 09:18:08 am

Hello,

When the image is faint (by example PGC5059619), if we clik on the button PGC ###:
we can choose the eosb color map which is more constrated and so it's more easy to evaluate the inclinaison.

What do you think of this ?

Thanks.

Ehsan

7/12/2018 09:33:09 pm

Hi,

Yes, this is a good way to see some more details for the faint galaxies. I used it today several times and tested it. It helps sometimes, however in many cases the galaxy is so faint that it doesn't have any robust photometry, and therefore they would be rejected eventually.

I cannot get this feature directly into the GUI, in order to make it easier to make better comaprisons in this mode. I think this option is a great way to check for more details and make sure that we are not missing a faint arm or other gaseous tail and/or trails.

I'll make a new post about this very soon.

Thanks a lot,

Pascal

7/12/2018 09:24:33 am

Hello,

In the scatter plot, it's possible to click on a point (and zoom copie etc.) et we can see the pgc and inclinations.
Very good.

Well, it would be nice if we can export all the pgc of the plot with the values of inclinations in a csv file.

Thanks a lot.

Ehsan

7/12/2018 09:38:57 pm

Hello,

I used Bokeh (the python package) to create those interactive features for plots. Even you can click on each point in the scatter plot and see what galaxy it corresponds to. It opens a new window and shows the corresponding photometry page for the chosen galaxy.

I am not sure whether I can make it possible through Bokeh to download the plotted scatter points in csv format. Since these are just primary results, I'd like to do more analysis to make any further conclusion. So, I think we are not going to make these results public before we publish the final output catalog.

Pascal

8/24/2018 12:20:14 pm

Hello,

It's not possible to connect to http://edd.ifa.hawaii.edu/inclination/index.php now. No respond, no ping.

Perhaps, it's because the dangerous hurricane Lane ?

Thanhs and thoughts for Hawaiians.

P

.

Ehsan

8/28/2018 07:04:30 pm

Our server was turned off during the hurricane to save it against the possible power surges. It's now back to normal. Thanks a lot for your kind help.

Udrea

6/5/2018 06:53:41 am

Hi,
If the HI profile is empty or missing, is it useful to treat the correspondent galaxy ?
Thanks

Ehsan

6/5/2018 10:37:37 pm

Refer to this post for your answer:
https://galinc.weebly.com/blog/june-05th-2018

In the case of missing profiles, please don't put a flag on the "bad HI profile". Also, no note regarding HI profile is necessary.

Udrea

7/18/2018 05:09:36 am

In case of galaxies with quite giant arms like PG9420, I use to "forget" the arms and concentrate on the central part, zooming to get the arms outside the picture (sometime the arms seems to have different inclination)
Is it a correct way to do ?
Thanks

Ehsan

7/18/2018 10:07:11 am

I found it that the entire galaxy should be considered in this process, including the arms. Mostly this is the arms that define a spiral galaxy plane. The central part (bulge) is usually round and sometimes completely spherical, so using that part of galaxy may cause big errors in the measured inclinations.

Denis Udrea

8/28/2018 01:38:20 am

Happy you're back (and safe !)

Ehsan

8/28/2018 07:03:00 pm

Thanks a lot. Nothing serious happened in our island. However the AC was turned off during the potential time of the hurricane, and therefore a couple network switches burned out and we lost connection.

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A complete manual is available here.
You can also find older questions and their answers here. Leave a comment below if you have any new question.