[vsnet-survey 36] ROSAT TDFs...

[no name <crawl@zoom.co.uk>]

Taichi Kato wrote:

>    Some of the listed object probably look better fit other normal
> stars.
> For example at the location of 1RXS-F J185334.3+291138 (for HR Lyr),
> there
> is a relatively bright candidate star GSC 2121.1881.  Eye examinations
>
> can have an advantage in examining such "noisy" (in terms of CV/normal
> star
> ratio and the error circle) catalogs.

Indeed!

The RASS-FSC at least had not been integrated into SIMBAD last time I
looked a week ago.  I'd started out by doing catalogue to catalogue
tests, but as Taichi Kato noted elsewhere, using too tight a restriction
meant possible CV connections were missed.  However, too loose a
position restriction and the coincidences start to take over... ...yet
we still need to allow for some poor positions in GCVS and some other
catalogues [that's why I used Downes & Shara, which I think everybody
calls DWS97].

As noted by TK above, visual inspection of the field helps in resolving
difficult cases.

Probably the only way to do this at the moment [until all the ROSAT cats
are absorbed into SIMBAD, thus enabling people to use the ALADIN server
for such things] is via Guide 7 and the TDFs below!  Guide 7 has D&S93
as a TDF, also GCVS, NSV, NSVS available, IRAS PSC/FSC available, etc,
&c, plus QSO, BLLAC and similar catalogues for objects which can also be
xray sources lying in the background field.  In this way I've just
checked some of TK's RASS-FSC - CV comments from recent vsnet-chats, and
they look quite good indeed, as he notes!  Also, digital sky survey
areas can be downloaded from web servers and imported into the
planetarium, as can data from USNO Ax servers.

The following TDFs are for RASS-BSC, RASS-FSC and RASS-PSC [ROSAT All
Sky Survey Bright, Faint and Point Source Catalogues respectively].
Symbols are _diamonds_ drawn _centred_ upon the co-ordinates of the
object: this enables most overlain stars to remain visible, and their
alignment to be judged by eye.  BSC is red, FSC is green and PSC is
grey.  Note some BSC and PSC positions can coincide, and possibly some
FSC & PSC [??].  Also, several PSC positions can appear for one source,
denoting multiple detections I believe.

The data files are available from the CDS Strasbourg FTP site
[ftp://cdsarc.u-strasbg.fr/cat/] under subdirectories .../IX/10A/ ,
.../IX/11/ and .../IX/29/ for Bright, Point and Faint source catalogues
respectively.  The latter two are not small.  The readme files in these
directories should be consulted for reference details and file details.
I have not bothered with the much smaller RASS-HRI catalogue, which
contains no objects that aren't in the above cats [I believe].

The following TDFs will plot the relevant data, with right click HELP
info on hardness ratio and flux available.  The symbols are _not_ to any
scale, and do _not_ denote the error circle size : this latter is quoted
as a value under HELP [although Guide can plot error ellipses, these
ones are normally too small to be sensibly plotted].

The TDFs default to ON at sub 5 degree levels.  They are minimalistic.
Unfortunately, and strangely, the Faint Source Catalogue is _not_ sorted
on RA for some reason, and this means that Guide tends to slow down when
these are being plotted.  Turn this off when not needed if it annoys.
The other two plot quite quickly, because they are sorted on RA.

In the following, the TDFs are inbetween rows of ===== and lines begin
and end with the ! character.  Lines that have become wrapped on
e-transfer can thus be corrected accordingly.  The ! characters are
superfluous, and _must_ be deleted before use.  The _full_ path _and_
name of the data files should be altered on the first lines of the TDFs
as per the user's hard disk.  The TDFs _must_ live in the Guide home
directory.

This will be of no use to most people, and very few of the many xray
objects are CVs [though quite a few more are variables of other sorts,
and a surprising number of "non-variable" binaries at first glance], but
to the best of my knowledge this is the only global route to easy visual
inspection of field alignment for these objects that is currently
available.

John


RASS-BSC TDF
==================
!file rosatbsc.dat!
!title RASS-BSC!
!RA H   7  2!
!RA M   9  2!
!RA S  11  4!
!de d  15  3!
!de m  18  2!
!de s  20  2!
!#text  1  21!
!~c  1  21 RASS BSC\n!
!~b  1  21 %s\n\n!
!~b 45   2 Position Error  %s arcsecs!
!~r 45   2  (includes 6 arcsecs systematic error)\n!
!~b  1   1 \n!
!~b 97   5 Hardness Ratio1 = %s!
!~r103   4  error = %s!
!~b108   5 \nHardness Ratio2 = %s!
!~r114   4  error = %s!
!~b  1   1 \n!
!~b147 0 A PHA is 0.1-0.4 keV!
!~b147 0 B PHA is 0.5-2.0 keV!
!~b147 0 C PHA is 0.5-0.9 keV!
!~b147 0 D PHA is 0.9-2.0 keV!
!~b147 0 b PHA is broad!
!~b147 0   PHA is broad!
!~c  1   1 \n!
!~r  1  21    (PHA = Pulse Height Amplitude detection range)\n!
!~r  1  21 \n\nThe hardness ratios are defined by:\n\n!
!~r  1  21 hr1 = ( B - A ) / ( B + A )  , where\n!
!~r  1  21 A = countrate in PHA range 0.1-0.4 keV\n!
!~r  1  21 B = countrate in PHA range 0.5-2.0 keV\n\n!
!~r  1  21 hr2 = ( D - C ) / ( D + C )  , where\n!
!~r  1  21 C = countrate in PHA range 0.5-0.9 keV\n!
!~r  1  21 D = countrate in PHA range 0.9-2.0 keV\n\n!
!!
!epoch 2000!
!sort 1!
!type sc5;m0,-32;l32,0;l0,32;l-32,0;l0,-32;!
!field 0 50!
!mag lim 0!
!shown 5!
!end!
==========================

RASS-FSC
=========================
!file rosatfsc.dat!
!title RASS-FSC!
!RA H   7  2!
!RA M   9  2!
!RA S  11  4!
!de d  15  3!
!de m  18  2!
!de s  20  2!
!#text  1  21!
!~c  1  21 RASS FSC\n!
!~b  1  21 %s\n\n!
!~b 45   2 Position Error  %s arcsecs!
!~r 45   2  (includes 6 arcsecs systematic error)\n!
!~b  1   1 \n!
!~b 97   5 Hardness Ratio1 = %s!
!~r103   4  error = %s!
!~b108   5 \nHardness Ratio2 = %s!
!~r114   4  error = %s!
!~b  1   1 \n!
!~b147 0 A PHA is 0.1-0.4 keV!
!~b147 0 B PHA is 0.5-2.0 keV!
!~b147 0 C PHA is 0.5-0.9 keV!
!~b147 0 D PHA is 0.9-2.0 keV!
!~b147 0 b PHA is broad!
!~b147 0   PHA is broad!
!~c  1   1 \n!
!~r  1  21    (PHA = Pulse Height Amplitude detection range)\n!
!~r  1  21 \n\nThe hardness ratios are defined by:\n\n!
!~r  1  21 hr1 = ( B - A ) / ( B + A )  , where\n!
!~r  1  21 A = countrate in PHA range 0.1-0.4 keV\n!
!~r  1  21 B = countrate in PHA range 0.5-2.0 keV\n\n!
!~r  1  21 hr2 = ( D - C ) / ( D + C )  , where\n!
!~r  1  21 C = countrate in PHA range 0.5-0.9 keV\n!
!~r  1  21 D = countrate in PHA range 0.9-2.0 keV\n\n!
!!
!epoch 2000!
!sort 0!
!type sc1;m0,-32;l32,0;l0,32;l-32,0;l0,-32;!
!field 0 50!
!mag lim 0!
!shown 5!
!end!
==============

RASS-PSC
===================
!file rosatpsc.dat!
!title RASS-PSC!
!RA H  54  8!
!units0 -2!
!de d  64  8!
!#text 31  20!
!~c 31  20 RASS PSC\n!
!~b 31  20 %s\n\n!
!~b112   5 Position Error %s arcsecs\n\n!
!~b163   6 Hardness Ratio1 = %s!
!~r169   6  error = %s!
!~b175   6 \nHardness Ratio2 = %s!
!~r181   6  error = %s!
!~b237 0 A \nPHA is 0.1-0.4 keV!
!~b237 0 B \nPHA is 0.5-2.0 keV!
!~b237 0 C \nPHA is 0.5-0.9 keV!
!~b237 0 D \nPHA is 0.9-2.0 keV!
!~b237 0 b \nPHA is broad!
!~b237 0   \nPHA is broad!
!~c 31   1 \n!
!~r  1  21    (PHA = Pulse Height Amplitude detection range)\n!
!~r  1  21 \n\nThe hardness ratios are defined by:\n\n!
!~r  1  21 hr1 = ( B - A ) / ( B + A )  , where\n!
!~r  1  21 A = countrate in PHA range 0.1-0.4 keV\n!
!~r  1  21 B = countrate in PHA range 0.5-2.0 keV\n\n!
!~r  1  21 hr2 = ( D - C ) / ( D + C )  , where\n!
!~r  1  21 C = countrate in PHA range 0.5-0.9 keV\n!
!~r  1  21 D = countrate in PHA range 0.9-2.0 keV\n\n!
!!
!epoch 2000!
!sort 1!
!type sc14;m0,-30;l30,0;l0,30;l-30,0;l0,-30;!
!field 0 50!
!mag lim 0!
!shown 5!
!end!
====================

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