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ROSAT Guest Observer Facility

ROSAT Status Report #106:

October 1, 1994



ROSAT NEWS No. 31 --- 1-Oct-1994

ROSAT Scientific Data Center at the

Max-Planck-Institut fuer Extraterrestrische Physik (MPE)

Postfach 1603, D-85740 Garching, Germany


e-mail addresses (Uli Zimmermann):
rosat_svc@mpe-garching.mpg.de (Internet) or MPE::ROSAT_SVC (SPAN)
ROSAT Service Area (including ROSAT Data Archive):
ftp rosat_svc.mpe-garching.mpg.de user: anonymous
WWW address: http://www.mpe.mpg.de/xray/wave/rosat/mission/rosat/
XUV Center: 29382::GXUVDC or GXUVDC@AIT.PHYSIK.UNI-TUEBINGEN.DE
WFC Archive access via telnet/ftp ait.physik.uni-tuebingen.de user: xuv (password: xuv_archive)
Contents:
- SATELLITE STATUS
- AO-5 TIMELINE
- ROSAT WORKSHOP III at MPE on OCTOBER 26 and 27
- ROSAT SOURCE DESIGNATION
- ROSAT USERS HANDBOOK
- EXSAS ISSUES
- ROSAT WORKSHOP REGISTRATION FORM

SATELLITE STATUS

No major problems were encountered during the last month. For urgent calibration purposes the PSPC was put into focus during one week in early September.


AO-5 TIMELINE

The first part of the long term mission timeline for AO-5, covering the period October 3, 1994 to April 10,1995 can be looked at in the ROSAT Service Area (directory timeline). Both a summary file (ao5_hri1.summary) and a more detailed timeline file (ao5_hri1.timeline) are available.


ROSAT WORKSHOP III at MPE on OCTOBER 26 and 27

If you have not yet registered for the 3rd ROSAT Workshop at MPE that will take place on October 26 and 27 (Wednesday & Thursday), please do it soon. This will help us in the general organisation. As in the last 2 years the workshop will offer a competent forum to present and discuss recent ROSAT results and inform on data evaluation issues. Please use the registration form available via a link below, or from the MPE ROSAT Service Area (general/workshop.form).


ROSAT SOURCE DESIGNATION

To assign unambiguous names for ROSAT objects one should use the recommendations given by the IAU Commission 5 published in the following journals:

IAU Transactions, vol XXB (1990), pp S46-S4
Pub. Astron.Soc.Pacific, 102 (1990), pp 1231-1233
Astron. and Astrophys. Special Issue, March (1992), pp A11-A13

The recommendation we distributed formerly is correct, but may give ambiguities in more densely populated regions. We therefore propose to use one of the following three formats depending on the absolute (!) positional accuracy of the X-ray position and the density in the field:

arcsecond accuracy (RA 1.5", Dec 1.0"; at the equator)
RA(2000): 01h23m45.6s ; Dec(2000): -76d54'32" ---> RX J012345.6-765432

fraction of arcmin accuracy (RA 15", Dec 0.1'; at the equator)
RA(2000): 01h23m45s ; Dec(2000): -76d54.6' ---> RX J012345-7654.6

arcmin accuracy (RA 1.5', Dec 1'; at the equator)
RA(2000): 01h23.7m ; Dec(2000): -76d54' ---> RX J0123.7-7654

remember to truncate, not to round:

RA(2000): 01h23m45s ; Dec(2000): -76d54'41" ---> RX J012345-7654.6
RA(2000): 01h23m45s ; Dec(2000): -76d54'42" ---> RX J012345-7654.7


ROSAT USERS HANDBOOK

After a long prepatory stage we can now announce a working draft of the ROSAT Users Handbook (RUH). It is intended to provide ROSAT users with an overview of all technical aspects of the observatory and has been prepared in a collaborative effort between the experts of GSFC, SAO, the University of Leicester and MPE. Besides a description of the satellite, it deals with different mission aspects, describes the performance of the telescopes and instruments and covers with special emphasis the different calibration issues. Appendices contain a short mission history, a list of known problems and information how to access the different ROSAT services. For the coming years the RUH will probably go through many updates, and suggestions from your end will certainly help us in this effort. Later on (all chapters filled) we intend to distribute it also as a printed book. At present it is available via the online services of the data centers. In the ROSAT Service Area it can be accessed from directory doc/handbook in 2 flavours: a POSTSCRIPT and a LATEX version. The file README contains additional info. A WWW version (mosaic) is in preparation. (The RUH is also available from GSFC from the legacy.gsfc.nasa.gov anonymous ftp account, under the /rosat/doc/users_handbook/ directory)


EXSAS ISSUES

An update of the EXSAS Users Guide has been installed in the ROSAT Service Area (directory doc/exsasguide). A (compressed) POSTSCRIPT version and a LATEX version plus a README file are available. We are also preparing a WWW version (mosaic; see address header). A printed version of the EXSAS Users Guide and of the EXSAS Command Summary is in preparation and will then be distributed to the institutes.

A new EXSAS software patch is available in the SVC area. Read file exsas.status in directory exsas to learn about the changes.

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A Registration Form is available for the for the ROSAT Users' Workshop on October 26/27 1994 at MPE.

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