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From: fb61@nyu.edu
Subject: obsid 0820330701 PN spectrum
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2 followups: 1 2

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Date: Mon, 13 May 2019 08:24:45 +0200
From: fb61@nyu.edu
To: xmmhelp@sciops.esa.int
Subject: obsid 0820330701 PN spectrum
Full_Name: Federico Bernardini
Submission from: (NULL) (193.147.152.102)


Dear All,

I am analysing data of obsid 0820330701. I noticed that the PN source spectrum
(both that automatically produced by the PPS and that reduced by my following
standard procedure) has an exposure of only 22ks, compared to an observation
duration of about 32ks. On the contrary, MOS1 and MOS2 spectra have 32ks
exposure. However, when producing the background subtracted light curves with
epiclccorr I get, for all instruments (including PN), a 32 ks long light curve.

Would you be so kind helping me understanding why the PN spectrum has an
exposure time of only 2.292e+04 sec?

Thanks a lot for your help.

Kind regards,


Reply 1

Resend
From: Lucia Ballo <xmmhelp@sciops.esa.int>
To: fb61@nyu.edu
Subject: Re: obsid 0820330701 PN spectrum (PR#84929)
Date: Tue May 14 12:45:04 2019
Dear Federico Bernardini,

During obsid 0820330701, the requested observing mode for pn was small 
window. Small window in pn has only about 70 per cent of live time. 
For an exposure duration of 32.7 ks, this corresponds to a 
duration corrected for dead time of about 22.9 ks.

For MOS cameras in small window, the live time is of the order of 
~97 per cent: for an exposure duration of about 33.2 ks, this means 
a corrected time of about 32.2 ks.


I hope that this can help you; otherwise please do not hesitate to contact 
us again.

With kind regards
Lucia

--
   Dr Lucia Ballo 
   XMM-Newton Science Operations Centre
   Community Support and Scientific Planning Team


Followup 1

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From: Federico Bernardini <bernardini@nyu.edu>
Date: Tue, 14 May 2019 14:52:13 +0400
Subject: Re: obsid 0820330701 PN spectrum (PR#84929)
To: Lucia Ballo <xmmhelp@sciops.esa.int>
--000000000000f543c80588d6d380
Content-Type: multipart/alternative; boundary="000000000000f543c70588d6d37f"

--000000000000f543c70588d6d37f
Content-Type: text/plain; charset="UTF-8"

Dear Lucia,

Thanks a lot for the prompt reply. I noticed that in the header the live
time is 22.9ks only. However, why the background subtracted light curve of
the PN is 32 ks long and not only 22.9 ks? I am confused. Thanks a lot for
your help.

Regards

F

Reduced with standard procedures:
[image: Screen Shot 2019-05-14 at 14.48.55.png]

PPS produced:

[image: Screen Shot 2019-05-14 at 14.50.10.png]

On Tue, May 14, 2019 at 2:45 PM Lucia Ballo <xmmhelp@sciops.esa.int>
wrote:

> Dear Federico Bernardini,
>
> During obsid 0820330701, the requested observing mode for pn was small
> window. Small window in pn has only about 70 per cent of live time.
> For an exposure duration of 32.7 ks, this corresponds to a
> duration corrected for dead time of about 22.9 ks.
>
> For MOS cameras in small window, the live time is of the order of
> ~97 per cent: for an exposure duration of about 33.2 ks, this means
> a corrected time of about 32.2 ks.
>
>
> I hope that this can help you; otherwise please do not hesitate to contact
> us again.
>
> With kind regards
> Lucia
>
> --
>    Dr Lucia Ballo
>    XMM-Newton Science Operations Centre
>    Community Support and Scientific Planning Team
>
> This message is intended only for the recipient(s) named above. It may
> contain proprietary information and/or
> protected content. Any unauthorised disclosure, use, retention or
> dissemination is prohibited. If you have received
> this e-mail in error, please notify the sender immediately. ESA applies
> appropriate organisational measures to protect
> personal data, in case of data privacy queries, please contact the ESA
> Data Protection Officer (dpo@esa.int).
>
>
>

--000000000000f543c70588d6d37f
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Dear
Lucia,<div><br></div><div>Thanks a lot for the prompt=
 reply. I noticed that in the header the live time is 22.9ks only. However,=
 why the background subtracted light curve of the PN is 32 ks long and not =
only 22.9 ks? I am confused. Thanks a lot for your
help.</div><div><br></di=
v><div>Regards</div><div><br></div><div>F</div><div><br></div><div>Reduced
=
with standard procedures:</div><div><img src=3D"cid:ii_jvnobpvy0"
alt=3D"Sc=
reen Shot 2019-05-14 at 14.48.55.png" width=3D"562"
height=3D"423"><br></di=
v><div><br></div><div>PPS
produced:</div><div><br></div><div><div><img
src=
=3D"cid:ii_jvnodq0v2" alt=3D"Screen Shot 2019-05-14 at 14.50.10.png" width=
=3D"432" height=3D"562"><br></div></div></div><br><div
class=3D"gmail_quote=
"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, May 14, 2019 at 2:45 PM
Luc=
ia Ballo &lt;<a
href=3D"mailto:xmmhelp@sciops.esa.int">xmmhelp@sciops.esa.i=
nt</a>&gt; wrote:<br></div><blockquote
class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex=
">Dear Federico Bernardini,<br>
<br>
During obsid 0820330701, the requested observing mode for pn was small
<br>
window. Small window in pn has only about 70 per cent of live time. <br>
For an exposure duration of 32.7 ks, this corresponds to a <br>
duration corrected for dead time of about 22.9 ks.<br>
<br>
For MOS cameras in small window, the live time is of the order of <br>
~97 per cent: for an exposure duration of about 33.2 ks, this means <br>
a corrected time of about 32.2 ks.<br>
<br>
<br>
I hope that this can help you; otherwise please do not hesitate to contact =
<br>
us again.<br>
<br>
With kind regards<br>
Lucia<br>
<br>
--<br>
=C2=A0 =C2=A0Dr Lucia Ballo <br>
=C2=A0 =C2=A0XMM-Newton Science Operations Centre<br>
=C2=A0 =C2=A0Community Support and Scientific Planning Team<br>
<br>
This message is intended only for the recipient(s) named above. It may cont=
ain proprietary information and/or<br>
protected content. Any unauthorised disclosure, use, retention or dissemina=
tion is prohibited. If you have received<br>
this e-mail in error, please notify the sender immediately. ESA applies app=
ropriate organisational measures to protect<br>
personal data, in case of data privacy queries, please contact the ESA Data=
 Protection Officer (<a href=3D"mailto:dpo@esa.int"
target=3D"_blank">dpo@e=
sa.int</a>).<br>
<br>
<br>
</blockquot

Message of length 247693 truncated


Reply 2

Resend
From: Lucia Ballo <xmmhelp@sciops.esa.int>
To: bernardini@nyu.edu
Subject: Re: obsid 0820330701 PN spectrum (PR#84929)
Date: Wed May 15 14:46:24 2019
Dear Federico,

Fractions of the time are scientifically "lost" (as dead time) along the 
whole exposure, as we have several intervals of dead and live times, 
alternating.

This means that we collect periods of good times from the beginning to the 
end of the exposure; therefore the light curve covers all the 32ks, 
although with very small gaps that in total correspond to ~30% (for pn) of 
the exposure time.

With kind regards
Lucia


Followup 2

Compose reply
Download message
From: Federico Bernardini <bernardini@nyu.edu>
Date: Wed, 15 May 2019 22:06:10 +0400
Subject: Re: obsid 0820330701 PN spectrum (PR#84929)
To: Nora Loiseau <xmmhelp@sciops.esa.int>
--000000000000d3ab600588f10104
Content-Type: text/plain; charset="UTF-8"

Hi Lucia,

Many thanks for your answer. Now things are fully clear.

Kind Regards,

F


On Wed, May 15, 2019, 16:46 Lucia Ballo <xmmhelp@sciops.esa.int> wrote:

> Dear Federico,
>
> Fractions of the time are scientifically "lost" (as dead time) along the
> whole exposure, as we have several intervals of dead and live times,
> alternating.
>
> This means that we collect periods of good times from the beginning to the
> end of the exposure; therefore the light curve covers all the 32ks,
> although with very small gaps that in total correspond to ~30% (for pn) of
> the exposure time.
>
> With kind regards
> Lucia
>
> This message is intended only for the recipient(s) named above. It may
> contain proprietary information and/or
> protected content. Any unauthorised disclosure, use, retention or
> dissemination is prohibited. If you have received
> this e-mail in error, please notify the sender immediately. ESA applies
> appropriate organisational measures to protect
> personal data, in case of data privacy queries, please contact the ESA
> Data Protection Officer (dpo@esa.int).
>
>
>

--000000000000d3ab600588f10104
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">Hi Lucia,<div
dir=3D"auto"><br></div><div dir=3D"auto">Ma=
ny thanks for your answer. Now things are fully clear.<div
dir=3D"auto"><br=
></div><div dir=3D"auto">Kind Regards,</div><div
dir=3D"auto"><br></div><di=
v dir=3D"auto">F</div><div
dir=3D"auto"><br></div></div></div><br><div
clas=
s=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, May 15,
201=
9, 16:46 Lucia Ballo &lt;<a
href=3D"mailto:xmmhelp@sciops.esa.int">xmmhelp@=
sciops.esa.int</a>&gt; wrote:<br></div><blockquote
class=3D"gmail_quote" st=
yle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear =
Federico,<br>
<br>
Fractions of the time are scientifically &quot;lost&quot; (as dead time)
al=
ong the <br>
whole exposure, as we have several intervals of dead and live times, <br>
alternating.<br>
<br>
This means that we collect periods of good times from the beginning to the =
<br>
end of the exposure; therefore the light curve covers all the 32ks, <br>
although with very small gaps that in total correspond to ~30% (for pn) of =
<br>
the exposure time.<br>
<br>
With kind regards<br>
Lucia<br>
<br>
This message is intended only for the recipient(s) named above. It may cont=
ain proprietary information and/or<br>
protected content. Any unauthorised disclosure, use, retention or dissemina=
tion is prohibited. If you have received<br>
this e-mail in error, please notify the sender immediately. ESA applies app=
ropriate organisational measures to protect<br>
personal data, in case of data privacy queries, please contact the ESA Data=
 Protection Officer (<a href=3D"mailto:dpo@esa.int" target=3D"_blank" rel=
=3D"noreferrer">dpo@esa.int</a>).<br>
<br>
<br>
</blockquote></div>

--000000000000d3ab600588f10104--


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