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From: msalz@hs.uni-hamburg.de
Subject: time constraints - phase requested
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Date: Thu, 21 Jan 2016 14:10:30 GMT
From: msalz@hs.uni-hamburg.de
To: xmmhelp@sciops.esa.int
CC: msalz@hs.uni-hamburg.de
Subject: time constraints - phase requested
Full_Name: Michael Salz
Submission from: (NULL) (134.100.120.158)


According to section 5.2.3.2 of the RPS Users Manual, I need to specify
"Phase0", "Period", "Phase", and "tolerance" for periodic timing constraints.
What is meant by requested "Phase"? Is it the phase corresponding to the start
of the observation, the start of the PN exposure, or maybe the middle of
observation?


Reply 1

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From: Jacobo Ebrero <xmmhelp@sciops.esa.int>
To: msalz@hs.uni-hamburg.de
Subject: Re: time constraints - phase requested (PR#78184)
Date: Thu Jan 21 14:44:29 2016
Dear Michael,

"Phase" refers to the orbital phase of the satellite, and it needs to be a value
between 0 and 1, where 0 would be the beginning of a given XMM revolution, and 1
the end of the revolution.

Best regards,
Jacobo
----------------------
Dr. Jacobo Ebrero
XMM-Newton SOC
User Support Group


Reply 2

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From: Jacobo Ebrero <xmmhelp@sciops.esa.int>
To: msalz@hs.uni-hamburg.de
Subject: Re: time constraints - phase requested (PR#78184)
Date: Thu Jan 21 17:03:23 2016
Dear Michael,

Looking more carefully at it, in this context "Phase" is actually referring to
the phase of the object, and not to the satellite orbit. This option is intended
for observations in which you don't want to observe the full phase of the target
but just part of it. We note that this is not clearly explained in the RPS
manual, and we will clarify this information in the next release of the manual.

Apologies for the confusion.

Best regards,
Jacobo
----------------------
Dr. Jacobo Ebrero
XMM-Newton SOC
User Support Group


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Subject: Re: time constraints - phase requested (PR#78184)
To: Jacobo Ebrero <xmmhelp@sciops.esa.int>
From: Michael Salz <msalz@hs.uni-hamburg.de>
Date: Thu, 21 Jan 2016 18:19:09 +0100
Dear Jacobo,

your explanation confirms what I thought, but my initial question is not 
answered yet. I have to specify the "requested phase". Logically, I 
would guess that this refers to orbital phase of the object at which the 
observation should start (plus minus the tolerance). But I would like to 
have this confirmed, because it could also refer to the exposure start 
or to the middle of the observation.

Example:
We want to observe a transit that occurs at phase 0. The observation 
should start hat phase 0.95, the PN exposure starts at 0.96 and extend 
to 0.04, hence the transit is centered.
Question:
Which phase do I provide under "requested Phase": 0.95, 0.96, or maybe 
even 0.0?

Thank you for you help.
Michael


On 01/21/2016 06:03 PM, Jacobo Ebrero wrote:
> Dear Michael,
>
> Looking more carefully at it, in this context "Phase" is actually referring
to
> the phase of the object, and not to the satellite orbit. This option is
intended
> for observations in which you don't want to observe the full phase of the
target
> but just part of it. We note that this is not clearly explained in the RPS
> manual, and we will clarify this information in the next release of the
manual.
>
> Apologies for the confusion.
>
> Best regards,
> Jacobo
> ----------------------
> Dr. Jacobo Ebrero
> XMM-Newton SOC
> User Support Group
>
> This message and any attachments are intended for the use of the addressee
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> The unauthorised disclosure, use, dissemination or copying (either in whole
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it from your system.
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sender.
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> Please consider the environment before printing this email.
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>



Reply 3

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From: Jacobo Ebrero <xmmhelp@sciops.esa.int>
To: msalz@hs.uni-hamburg.de
Subject: Re: time constraints - phase requested (PR#78184)
Date: Fri Jan 22 08:26:07 2016
Dear Michael,

Replying to your particular example, if you are interested in observing an event
happening at phase0, you need to provide the time for phase0, and in the "phase"
field put a 0. Do not worry about anything else at this stage. Later, during the
enhancement of the proposal, you will need to mention to the enhancer that you
want your event to be monitored in the middle of the observation so that he can
pass this information to the schedulers.

Best regards,
Jacobo
----------------------
Dr. Jacobo Ebrero
XMM-Newton SOC
User Support Group

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