[Loops] new spectroscopic analysis tool
Leon Golub
lgolub at cfa.harvard.edu
Mon Jun 29 11:46:31 MDT 2015
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 |
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> sometimes the
> Montana State University | paperwork is overwhelming."
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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
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> Regulations (EAR), 15 CFR Part 730-799, of the United States
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>
>
>
>
> --
> 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.
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