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From: itaka@amalthea.phys.s.u-tokyo.ac.jp
Subject: PN rmf energy axis
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Date: Wed, 7 May 2003 14:10:51 GMT
From: itaka@amalthea.phys.s.u-tokyo.ac.jp
To: xmmhelp@xmm.vilspa.esa.es
CC: itaka@amalthea.phys.s.u-tokyo.ac.jp
Subject: PN rmf energy axis
Full_Name: Isao Takahashi
Submission from: (NULL) (133.11.165.60)


Dear XMM helpdesk,

According to the event file, PN PIs locate every 5eV, 
but E_MIN and E_MAX in rmf do not in low energy band.
I use the latest CCFs and SAS5.4.1.
If the rmf value is true, does evselect not strictly function correctly?

Additionally, E_MIN and E_MAX do not always coincide among rmfs,
at least between my handmade rmf and canned rmf(epn_ff20_sdY?.rmf),
e.g. E_MIN@CHANNEL=100 is 5.2632397E-01(handmade), 5.3531796E-01(canned).
Which rmf is more recommended at present,
and will these discrepancies be fixed in the future,
i.e. all energy digits be 5eV(E_MIN@100ch=5E-01)?

Sincerely, 
Isao Takahashi


Reply 1

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From: Rosario Gonzalez Riestra <xmmhelp@xmm.vilspa.esa.es>
To: itaka@amalthea.phys.s.u-tokyo.ac.jp
Subject: Re: PN rmf energy axis (PR#8526)
Date: Thu May  8 09:28:24 2003

Dear Dr. Takahashi,

I have forwarded your question to the rmfgen specialist. I'll let you know as
soon as
I get his answer.

Regards,

		Rosario Gonzalez-Riestra
	


Reply 2

Resend
From: Rosario Gonzalez Riestra <xmmhelp@xmm.vilspa.esa.es>
To: itaka@amalthea.phys.s.u-tokyo.ac.jp
Subject: Re: PN rmf energy axis (PR#8526)
Date: Mon May 12 07:00:52 2003


Dear Dr. Takahashi,

This is the answer from the rmfgen expert:

.......
The bin width of each EPIC-pn PI channel is indeed variable and only
approximates to 5eV. The RMFs produced by rmfgen should have the
same binning as the canned RMFs though - i.e. the EBOUNDS values in
the CCF should contain the same values as are present in the matrices
available from the SOC web-site. I'll check this up.
.......


Regards,

		Rosario

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