[IPTA Clock] clock data set v1.0

[Rutger van Haasteren]

Oops, never mind, I see that I missed your previous email! Ignore my reply
:D


On Tue, Jan 15, 2013 at 11:48 AM, Rutger van Haasteren <vhaasteren at gmail.com
> wrote:

> Hi George,
>
> Are we not eventually going to use the IPTA combined data release? I
> thought that dataset, which is already being put together by Joris et al as
> a formal IPTA project, is meant specifically for IPTA purposes like the
> IPTA clock project...
>
> But kudo's for sending this data around: this is more than is available on
> the IPTA wiki (Joris' data release 'A' only contains 13 pulsars).
>
> Cheers,
>
> Rutger
>
>
>
> On Tue, Jan 15, 2013 at 7:17 AM, <George.Hobbs at csiro.au> wrote:
>
>> Hi all,
>>
>>  I've had a first go a making an IPTA data set for use as part of the
>> clock project.  The data set is attached to this email as ipta_v1.tar.gz.
>>  I have included all 28 pulsars in the IPTA sample.  This is very much an
>> initial data set and:
>>
>> 1. doesn't include EFACs/EQUADs etc.
>> 2. doesn't include any DM correction
>> 3. doesn't include any sub-channel offsets
>>
>> However,
>> 1. all pulsars are referred to TT(BIPM2011) and DE421
>> 2. all pulsar names are J names
>> 3. removed the use of ecliptic coordinates (probably not a good idea)
>> 4. everything is in tempo2 format
>> 5. all the arrival times are in one file that can be time sorted (i.e.,
>> TIME commands have been removed and replaced with flags)
>> 6. weighting is turned on
>>
>> Mike and I have also ensured that the tempo2 clock files are up-to-date
>> in CVS (this has included updating TT(BIPM2011))
>>
>> This is an initial data set.  The final data set will be significantly
>> different (the DM correction will make a huge difference), but the number
>> of pulsars, data spans, number of points, frequencies etc. are likely to
>> remain basically the same.  Therefore, the point of sending out this data
>> set is for people to dust of their algorithms and ensure that their version
>> of tempo2 is up-to-date etc.
>>
>> I attach four figures that give a basic summary of the data.  The first (
>> ipta.ps) shows the data sampling for the IPTA pulsars.  The different
>> colours indicate different observing frequencies:
>>
>> black (f < 500MHz)
>> red (f < 700MHz)
>> green (f < 1000 MHz)
>> dark blue (f < 1500 MHz)
>> light blue (f < 2000 MHz)
>> pink (f < 4000 MHz)
>> yellow (f > 4000 MHz)
>>
>> The second plot (nano.ps) is the same, but just for the NANOGrav data
>> and epta.ps and ppta.ps are the same for those PTAs.
>>
>> So, please have a play with the data sets and please let me know if you
>> find any major issues.  My intention is:
>>
>> ipta_v1.0 -- the data set attached to this email
>> ipta_v1.1 -- include DM correction
>> ipta_v1.2 -- include EFAC/EQUADs
>> ipta_v1.3 -- include high quality .par file and Cholesky models
>>
>> Around version 1.2, I'll also work with Mike to produce the simulated
>> data sets that have the same properties as the known data, but also has a
>> known clock signal.
>>
>> Finally this email distribution list has lots of PPTA and EPTA members,
>> but very few NANOgrav members.  Rossina/Demetrios, do you think that we
>> should try and get some more NANOGrav members involved?  If so, how?
>>
>> Cheers,
>>  George
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> George Hobbs
>> Research Scientist
>> Astronomy and Space Science
>> CSIRO
>>
>> Phone: +61 2 9372 4652
>> george.hobbs at csiro.au<mailto:george.hobbs at csiro.au> | www.csiro.au<
>> http://www.csiro.au/>
>> Address: PO Box 76, Epping NSW 1710
>> Australia (Cnr Vimiera & Pembroke Roads, Marsfield NSW, 2122)
>>
>>
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>>
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>>
>>
>
>
> --
>
> ______________________________________________________________________
>  dr. Rutger van Haasteren, post-doctoral researcher Astrophysics
>  Max Planck Institute for gravitational physics (Albert Einstein Institute)
>  Hannover, Germany
>  E-mail: vhaasteren at gmail.com
>



-- 

______________________________________________________________________
 dr. Rutger van Haasteren, post-doctoral researcher Astrophysics
 Max Planck Institute for gravitational physics (Albert Einstein Institute)
 Hannover, Germany
 E-mail: vhaasteren at gmail.com
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