[Loops] new spectroscopic analysis tool
Charles C. Kankelborg
kankel at solar.physics.montana.edu
Mon Jun 29 13:21:35 MDT 2015
Thanks Jim & Leon. I'd never have discovered this!
-C
> On 2015 Jun 29, , at 11:46 AM, Leon Golub <lgolub at cfa.harvard.edu> wrote:
>
> Here's another try. It should come through this time.
>
> Leon
>
>
> On 06/29/2015 01:41 PM, DeLuca, Edward wrote:
>> Was there suppose to be an attachment?
>>
>> On Mon, Jun 29, 2015 at 1:33 PM, Leon Golub <lgolub at cfa.harvard.edu
>> <mailto: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
>> <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
>> <mailto: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
>> <mailto: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
>> <http://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 <tel:1-301-286-9060>
>>
>> Fax: 1-301-286-7194 <tel:1-301-286-7194>
>>
>> E-mail: James.A.Klimchuk at nasa.gov
>> <mailto: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.
>>
>>
>>
>>
>> ********************************************************************************
>>
>>
>>
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>>
>> ___________________________________________________________________
>> _____
>> 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 <tel:406-994-7853> |
>> --Wernher von Braun
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>>
>>
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>>
>> --
>> ______________________________________________________________________________
>> Leon Golub, Senior Astrophysicist
>> Smithsonian Astrophysical Observatory
>> 60 Garden Street
>> Cambridge, MA 02138
>> 617 495 7177 <tel:617%20495%207177>
>> FAX 496 7577
>> lgolub at cfa.harvard.edu <mailto: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
>
> --
> ______________________________________________________________________________
> 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.
>
> <Oktem2014IEEE.pdf>_______________________________________________
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________________________________________________________________________
Charles Kankelborg AC7NY |
260C EPS Building | "Give thanks to the Lord with the lyre; sing
Physics Department | praises to him with a harp of ten strings."
Montana State University |
Bozeman, MT 59717 | --Psalm 33:2
Phone: 406-994-7853 |
FAX: 406-994-4452 |
http://solar.physics.montana.edu/kankel/
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