[Loops] new spectroscopic analysis tool

[DeLuca, Edward]

Was there suppose to be an attachment?

On Mon, Jun 29, 2015 at 1:33 PM, Leon Golub <lgolub at cfa.harvard.edu> wrote:

> Here's a copy of the Oktem et al. paper.
>
> Leon
>
>
> On 06/29/2015 01:26 PM, Klimchuk, James A. (GSFC-6710) wrote:
>
>> Thanks, Charles. Another paper on this general subject that deals with
>> spectral imaging (overlap-ograms) was recently published by Figen Oktem
>> (Oktem et al. 2014, IEEE Trans. on Image Processing, vol. 23, no. 12, p.
>> 5707). Unfortunately, it doesn't seem to be available on ADS.
>>
>> Cheers,
>> Jim
>>
>>  -----Original Message-----
>>> From: Charles C. Kankelborg [mailto:kankel at solar.physics.montana.edu]
>>> Sent: Monday, June 29, 2015 12:39 PM
>>> To: Klimchuk, James A. (GSFC-6710)
>>> Cc: (Loops at solar.physics.montana.edu)
>>> Subject: Re: [Loops] new spectroscopic analysis tool
>>>
>>> Hi Jim,
>>>
>>> This is a needed improvement. This kind of interpolation has been
>>> available for some
>>> time, but I have not see in applied to spectra (where it is probably
>>> most needed, for
>>> all the reasons you point out). Sakurai and Shin derived analytically,
>>> in closed form,
>>> a spline interpolation with rigorous photon conservation:
>>>
>>> Takashi Sakurai and Junho Shin, 2001
>>> "Interpolation of One- and Two-Dimensional Images with Pixelwise Photon
>>> Number
>>> Conservation "
>>> http://pasj.oxfordjournals.org/content/53/2/361.full
>>>
>>> With our usual detectors (rear-illuminated CCDs) there can be
>>> significant charge
>>> spreading in the field free region, so the pixels are well defined (in
>>> effect, they are
>>> fuzzy and overlapping). A proper flux-conserving interpolation scheme
>>> should take
>>> that into account. To my knowledge, that has not been done.
>>>
>>> Best regards,
>>> Charles
>>>
>>>
>>>  On 2015 Jun 29, , at 6:59 AM, Klimchuk, James A. (GSFC-6710)
>>>>
>>> <james.a.klimchuk at nasa.gov> wrote:
>>>
>>>>
>>>> Hi everyone,
>>>>
>>>>
>>>>
>>>>      You might be interested in a new tool that Spiros, Durgesh, and I
>>>> have
>>>>
>>> developed for analyzing spectra. It can be downloaded
>>> fromhttp://lanl.arxiv.org/abs/1506.08102.  The abstract is below.
>>>
>>>>
>>>>
>>>>
>>>> Hope to see many of you at Loops VII,
>>>>
>>>> Jim
>>>>
>>>>
>>>>
>>>> The detailed shapes of spectral line profiles provide valuable
>>>> information about the
>>>>
>>> emitting plasma, especially when the plasma contains an unresolvedline
>>> blends is
>>> another. We have developed an iterative procedure called Intensity
>>> Conserving
>>> Spline Interpolation (ICSI) that corrects for this effect. As its name
>>> implies, it
>>> conserves the observed intensity within each wavelength bin, which
>>> ordinary fits do
>>> not. Given the rapid convergence, speed of computation, and ease of use,
>>> we
>>> suggest that ICSI be made a standard component of the processing
>>> pipeline for
>>> spectroscopic data.
>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ********************************************************************************
>>>>
>>>> James A. Klimchuk
>>>>
>>>> NASA Goddard Space Flight Center
>>>>
>>>> Solar Physics Lab, Code 671
>>>>
>>>> Bldg. 21, Rm. 158
>>>>
>>>> Greenbelt, MD  20771
>>>>
>>>> USA
>>>>
>>>>
>>>>
>>>> Phone:  1-301-286-9060
>>>>
>>>> Fax:      1-301-286-7194
>>>>
>>>> E-mail:  James.A.Klimchuk at nasa.gov
>>>>
>>>> Homepage:
>>>>
>>>
>>> http://science.gsfc.nasa.gov/sed/index.cfm?fuseAction=people.jumpBio&&iPhonebo
>>> okId=15844
>>>
>>>>
>>>>
>>>>
>>>> No endorsement by NASA is implied for any correspondence related to my
>>>> official
>>>>
>>> role in professional organizations.
>>>
>>>>
>>>>
>>>>
>>>>
>>>> ********************************************************************************
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Loops mailing list
>>>> Loops at solar.physics.montana.edu
>>>> https://mithra.physics.montana.edu/mailman/listinfo/loops
>>>>
>>>
>>> ___________________________________________________________________
>>> _____
>>> Charles Kankelborg AC7NY |
>>> 260C EPS Building        |
>>> Physics Department       |  "We can lick gravity, but sometimes the
>>> Montana State University |  paperwork is overwhelming."
>>> Bozeman, MT 59717        |
>>> Phone: 406-994-7853      |          --Wernher von Braun
>>> FAX:   406-994-4452      |
>>> http://solar.physics.montana.edu/kankel/
>>>
>>
>> _______________________________________________
>> Loops mailing list
>> Loops at solar.physics.montana.edu
>> https://mithra.physics.montana.edu/mailman/listinfo/loops
>>
>>
> --
>
> ______________________________________________________________________________
> Leon Golub, Senior Astrophysicist
> Smithsonian Astrophysical Observatory
> 60 Garden Street
> Cambridge, MA 02138
> 617 495 7177
> FAX 496 7577
> lgolub at cfa.harvard.edu
>
> ______________________________________________________________________________
>
> This communication may contain information subject to United
> States export control regulation under either the International
> Traffic in Arms Regulations (ITAR), 22 CFR Parts 120-130, of the
> United States Department of State, the Export Administration
> Regulations (EAR), 15 CFR  Part 730-799, of the United States
> Department of Commerce, or both.  Export of this information to
> foreign persons, entities, or countries is subject to prior license
> or exemption by the applicable agency.
>
>


-- 
Edward DeLuca
Senior Scientist
Harvard-Smithsonian Center for Astrophysics
617-496-7725
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mithra.physics.montana.edu/pipermail/loops/attachments/20150629/734164a0/attachment.html>