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From: paoloesp@iasf-milano.inaf.it
Subject: Obs. 0743980501 - missing OM data
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Date: Thu, 18 Sep 2014 12:41:10 GMT
From: paoloesp@iasf-milano.inaf.it
To: xmmhelp@sciops.esa.int
CC: paoloesp@iasf-milano.inaf.it
Subject: Obs. 0743980501 - missing OM data
Full_Name: Paolo Esposito
Submission from: (NULL) (155.253.16.99)


Hello,

I am analysing the (still proprietary) data set 0743980501 (obs.ID), rev. 2636.

From the 'Scheduled Observations search' I see that 7 OM exposures were
scheduled:

OM - B I - Sci User Def (007)	 05-02@11:40:07	 1306	  	  
OM - B F - Sci User Def (006)	 05-02@12:01:54	 4706	  	  
OM - B F - Sci User Def (008)	 05-02@13:20:21	 4706	  	  
OM - B F - Sci User Def (009)	 05-02@14:38:48	 4306	  	  
OM - B F - Sci User Def (010)	 05-02@15:50:35	 1506	  	  
OM - B F - Sci User Def (011)	 05-02@16:15:42	 4306	  	  
OM - B F - Sci User Def (012)	 05-02@17:27:29	 1506

In the Observation Log Browser, the log reads:
Exp ID	Instrument	Mode	Filter	Exp Start Time	Exp End Time	Scheduled Duration
(sec)	Performed Duration (sec)
007	OM	OM Sci User Def FAST	B	2014-05-02@11:40:07	2014-05-02@12:01:53	1000	0
006	OM	OM Sci User Def FAST	B	2014-05-02@12:01:54	2014-05-02@13:20:20	4400	0
008	OM	OM Sci User Def FAST	B	2014-05-02@13:20:21	2014-05-02@14:38:47	4400	0
009	OM	OM Sci User Def FAST	B	2014-05-02@14:38:48	2014-05-02@15:50:34	4000	4000
010	OM	OM Sci User Def FAST	B	2014-05-02@15:50:35	2014-05-02@16:15:41	1200	1200
011	OM	OM Sci User Def FAST	B	2014-05-02@16:15:42	2014-05-02@17:27:28	4000	4000
012	OM	OM Sci User Def FAST	B	2014-05-02@17:27:29	2014-05-02@17:52:35	1200	1200

It seems that for some reason no data were acquired during exps 6, 7 and 8
(Performed Duration = 0), but there are no comments on that. I also notice that
in the schedule exp.#7 was in imaging mode while it is given in fast mode in the
log.

The PPS index lists only these exposures:

Inst. Exp Id Sched. Mode Data Mode Filter Position Total Duration Actual Start
Actual Stop
  OM  S400  Y  UNDEFINED	    B     -154  2014-05-02T11:44:17 
2014-05-02T11:41:43
  OM  S009  Y  Fast  Fast, imaging  B     3999  2014-05-02T14:43:00 
2014-05-02T15:49:39
  OM  S010  Y  Fast  Fast, imaging  B     1200  2014-05-02T15:54:45 
2014-05-02T16:14:45
  OM  S011  Y  Fast  Fast, imaging  B     4000  2014-05-02T16:19:53 
2014-05-02T17:26:33
  OM  S012  Y  Fast  Fast, imaging  B     1198  2014-05-02T17:31:41 
2014-05-02T17:51:39

What is exp.S400?
In the PPS and ODF there are only files corresponding to exps 9, 10, 11, 12.

Can you confirm that exps. 9, 10, 11, and 12 are the all and only scientific OM
data that do exist for obs.0743980501?
If so, why weren't exps. 6, 7, and 8 carried out?  

Best Regards,
 Paolo


Reply 1

Resend
From: Jacobo Ebrero <xmmhelp@sciops.esa.int>
To: paoloesp@iasf-milano.inaf.it
Subject: Re: Obs. 0743980501 - missing OM data (PR#74857)
Date: Fri Sep 19 08:43:25 2014
Dear Paolo,

The first three OM exposures of your observation are missing due to a problem
with the DPU (data processing unit). This does not happen very often but when it
does the science data in them is lost. The S400 exposure belongs to the field
acquisition of the OM, and we are afraid that it also failed. The negative
exposure time that you see in the pps index might be due to some missing
information in the housekeeping files.

Since there was no field acquisition and the window in Fast mode is rather
small, we have checked the pseudoimages of the remaining four OM exposures. The
source seems to be in the images, although not fully centered, so in principle
it is safe to reprocess these exposures with SAS and extract useful science from
them.

We apologize for the loss of part of the data. Please do not hesitate in
contacting us again if you find further problems with the processing of the
remaining exposures.

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


Followup 1

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Date: Fri, 19 Sep 2014 11:47:56 +0200
Subject: Re: Obs. 0743980501 - missing OM data (PR#74857)
From: Paolo Esposito <paoloesp@iasf-milano.inaf.it>
To: Jacobo Ebrero <xmmhelp@sciops.esa.int>
--001a113a53d2e43888050367fea0
Content-Type: text/plain; charset=ISO-8859-1

Thank you for your prompt reply.

Best wishes,
Paolo

------------------
Paolo Esposito
INAF - IASF Milano
paoloesp@iasf-milano.inaf.it
Il giorno 19/set/2014 10:43, "Jacobo Ebrero" <xmmhelp@sciops.esa.int> ha
scritto:

> Dear Paolo,
>
> The first three OM exposures of your observation are missing due to a
> problem
> with the DPU (data processing unit). This does not happen very often but
> when it
> does the science data in them is lost. The S400 exposure belongs to the
> field
> acquisition of the OM, and we are afraid that it also failed. The negative
> exposure time that you see in the pps index might be due to some missing
> information in the housekeeping files.
>
> Since there was no field acquisition and the window in Fast mode is rather
> small, we have checked the pseudoimages of the remaining four OM
> exposures. The
> source seems to be in the images, although not fully centered, so in
> principle
> it is safe to reprocess these exposures with SAS and extract useful
> science from
> them.
>
> We apologize for the loss of part of the data. Please do not hesitate in
> contacting us again if you find further problems with the processing of the
> remaining exposures.
>
> 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
> or addressees only.
> The unauthorised disclosure, use, dissemination or copying (either in
> whole or in part) of its
> content is not permitted.
> If you received this message in error, please notify the sender and delete
> it from your system.
> Emails can be altered and their integrity cannot be guaranteed by the
> sender.
>
> Please consider the environment before printing this email.
>
>

--001a113a53d2e43888050367fea0
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<p>Thank you for your prompt reply.</p>
<p>Best wishes,<br>
 Paolo</p>
<p>------------------<br>
Paolo Esposito<br>
INAF - IASF Milano<br>
<a href=3D"mailto:paoloesp@iasf-milano.inaf.it">paoloesp@iasf-milano.inaf.i=
t</a></p>
<div class=3D"gmail_quote">Il giorno 19/set/2014 10:43, &quot;Jacobo
Ebrero=
&quot; &lt;<a
href=3D"mailto:xmmhelp@sciops.esa.int">xmmhelp@sciops.esa.int=
</a>&gt; ha scritto:<br type=3D"attribution"><blockquote
class=3D"gmail_quo=
te" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"=
>Dear Paolo,<br>
<br>
The first three OM exposures of your observation are missing due to a probl=
em<br>
with the DPU (data processing unit). This does not happen very often but wh=
en it<br>
does the science data in them is lost. The S400 exposure belongs to the fie=
ld<br>
acquisition of the OM, and we are afraid that it also failed. The negative<=
br>
exposure time that you see in the pps index might be due to some missing<br=
>
information in the housekeeping files.<br>
<br>
Since there was no field acquisition and the window in Fast mode is rather<=
br>
small, we have checked the pseudoimages of the remaining four OM exposures.=
 The<br>
source seems to be in the images, although not fully centered, so in princi=
ple<br>
it is safe to reprocess these exposures with SAS and extract useful science=
 from<br>
them.<br>
<br>
We apologize for the loss of part of the data. Please do not hesitate in<br=
>
contacting us again if you find further problems with the processing of the=
<br>
remaining exposures.<br>
<br>
Best regards,<br>
Jacobo<br>
----------------------<br>
Dr. Jacobo Ebrero<br>
XMM-Newton SOC<br>
User Support Group<br>
<br>
This message and any attachments are intended for the use of the addressee =
or addressees only.<br>
The unauthorised disclosure, use, dissemination or copying (either in whole=
 or in part) of its<br>
content is not permitted.<br>
If you received this message in error, please notify the sender and delete =
it from your system.<br>
Emails can be altered and their integrity cannot be guaranteed by the sende=
r.<br>
<br>
Please consider the environment before printing this email.<br>
<br>
</blockquote></div>

--001a113a53d2e43888050367fea0--


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