ISIS do not merge the orders 51,52and 53 to a xxxfull.fit

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Berthold Stober
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Joined: Thu Apr 21, 2016 8:15 pm

ISIS do not merge the orders 51,52and 53 to a xxxfull.fit

Post by Berthold Stober »

Hi,
I have the new colli for the eShel. They from shelyak told me, I can carry on as before after changing the colli, but the merging process to *full.fit will not run with ISIS. If I select the orders from 33 to 50, everything runs good as before. But if I select orders 33 to 53 the merging process will not go on. All values in the y axis are "0" in the full.fit.

A single plot of the orders 51,52,53 will run. The reason:

These orders are not normalized to 1 as the other orders. But why not? Could anybody help me please

berthold
Olivier GARDE
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Re: ISIS do not merge the orders 51,52and 53 to a xxxfull.fi

Post by Olivier GARDE »

Hi Berthold,

If you can show the result you get on the full spectrum that would help us understand the problem.

Nevertheless, some tracks to explore to check that everything is ok :
- Do you use the last version of ISIS (the current version is V5.9.3)
- are the files def_order and Def-Lambda been correctly filled with the values ​​for the orders that were not accessible with the old doublet ?
- Is a new instrumental response made for example on Vega to also supplement the responses of the additional orders?
- Is there a sufficient number of flat that have been made because the tungsten lamp being very cold, it takes a large number of flat to be able to have a sufficient signal in the blue.

If the processing goes on without any error with ISIS, it is likely that there is a bad snr on one of the orders edges to order 50 or 51, have you done a "check 3" on ISIS to see what the software has find ?
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Berthold Stober
Posts: 35
Joined: Thu Apr 21, 2016 8:15 pm

Re: ISIS do not merge the orders 51,52and 53 to a xxxfull.fi

Post by Berthold Stober »

Bonjour Olivier,

I asked meanwhile Martin Dubs and THIS problem is solved. The def_order.lst was'nt with the numbers of new orders quite ok. And I learnt meanwhile that the tungsten flats are an additional problem......

Another question:

if I use the 50µ fiber directly on the calibration unit (tungsten!) I have ~50%(!!) more light in the tungsten flat as if I use

tungsten->200µ fiber->fiberinjection->50µ fiber. Is this ok? :?
I need ~20 sec for a tungsten flat for ~ 50.000 ADU.....is this also ok or normaly?

Unfortunately I cannot upload a file XXXX.fit, also not xxx.lst , so I cannot show you a tungsten.fit flat or the def_order.lst from me. :cry:

Merci d'avoir pris soin de mes problemes

amicalement
berthold
Berthold Stober
Posts: 35
Joined: Thu Apr 21, 2016 8:15 pm

Re: ISIS do not merge the orders 51,52and 53 to a xxxfull.fi

Post by Berthold Stober »

Hello Olivier,

I have additionally problems with the flux . Is it depending from the angel alpha of the grating? I have had in earlier times more flux in the past. Could you say anything to this problem please?

Amicalement
Berthold
Olivier GARDE
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Re: ISIS do not merge the orders 51,52and 53 to a xxxfull.fi

Post by Olivier GARDE »

Berthold Stober wrote:
tungsten->200µ fiber->fiberinjection->50µ fiber. Is this ok? :?
Yes this is right.
Berthold Stober wrote: I need ~20 sec for a tungsten flat for ~ 50.000 ADU.....is this also ok or normaly?
In bin 1x1 or 2x2 ? With my set up my time exposure for a flat in bin 2x2 with an ATIK 460ex is about 2,5 secondes but is very dependent of the fiber (centering during factory assembly, type of the fiber Hi-oh or not, etc ...)
Berthold Stober wrote: Unfortunately I cannot upload a file XXXX.fit, also not xxx.lst , so I cannot show you a tungsten.fit flat or the def_order.lst from me. :cry:
berthold
Maybe you can put a screen copy or convert the fit in jpeg or PNG ? It's just to see how looks your check3 image by ISIS (you will see each order lines and how it looks in the borders of each order.)
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Robin Leadbeater
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Re: ISIS do not merge the orders 51,52and 53 to a xxxfull.fi

Post by Robin Leadbeater »

Berthold Stober wrote: Unfortunately I cannot upload a file XXXX.fit, also not xxx.lst , so I cannot show you a tungsten.fit flat or the def_order.lst from me. :cry:
If you add it as a zip file the forum should accept it. (perhaps not if it is a large file though)

Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Berthold Stober
Posts: 35
Joined: Thu Apr 21, 2016 8:15 pm

Re: ISIS do not merge the orders 51,52and 53 to a xxxfull.fi

Post by Berthold Stober »

Hi Olivier,

merci beaucoup pour votre réponse. Je lda vois seulement maintenant.

S'il vous plaît, est-ce que tu peux prendre une spectre à 20sec de vega? Et puis dis moi quel télescope t'utiluses et j'ai besoin du 2D spectre.

So I can compare my equipment.....with yours.

I use a KAF 3200 with 1x1 binning and I reache ~40.000 e- with 20 sec exposition time using the tungsten lamp of shelyak calibration unit. Is it also ok?

Amicalement
Berthold

( can I get your email address so I could use the Dropbox?)
Berthold Stober
Posts: 35
Joined: Thu Apr 21, 2016 8:15 pm

Re: ISIS do not merge the orders 51,52and 53 to a xxxfull.fi

Post by Berthold Stober »

Hi,

does anyone has the same configuration as I have?:

eShel from shelyak, fiberinjection and calibration unit from shelyak and C14. So I could compare. I mean I don't have enough flux in my spectra and I don't know what I could do.

Cheers berthold
Olivier GARDE
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Re: ISIS do not merge the orders 51,52and 53 to a xxxfull.fi

Post by Olivier GARDE »

Weather is not good here in South east of France, so I try to do Vega as soon as possible, but I don't think you can compare my vega spectrum with yours because we haven't the same same setup :
- Different telescope
- Maybe different focal reducer.
- Different CCD
- optical Fiber Hi-OH or not ?
- Quality of the sky ? Transparency ?

And for Vega, what about the air mass for the comparison ? and also the precision of autoguiding ?

20 s flor the flat to have 50000 ADU, why not ?
It's very dependant of the optical fiber. I have two fibers, one I can have 50000 ADU in 2,5s and the other with 30s exposure.
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Berthold Stober
Posts: 35
Joined: Thu Apr 21, 2016 8:15 pm

Re: ISIS do not merge the orders 51,52and 53 to a xxxfull.fi

Post by Berthold Stober »

Thank you Olivier,

Now, there exists an excelsheet written by Klaus Vollmann . Using it one can compute the efficiency of the hole Eqipment.All what I need is a spectrum of Vega and the diameter of the telescope....and the type of your CCD

I have had ~ 8,4 %, but now I am far away from this and I don't know the reason.

Ok tungsten flat :

I have had after 7 sec ~ nearly 48000 e- and now I need 20 or 30 sec for this value.

And you are right....I am waiting for the new fiber from shelyak but they they can not deliver at the moment ;) when they can deliver I'll test the new fiber.
And thanks that you are willing to take vegaspektrum for me. All what I need , is the diameter of your telescope and the 2D Spektrum. Please could you sent me a tungsten 2D too?

Amicalement Berthold
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