Cycle 10 Deadline Past---Proposals are In! >September 28, 2004
RXTE & XMM Squeeze Neuton Star Equation of State (September 8, 2004)
RXTE Cycle 10 Proposal Due Date Extended to September 20, 2004; GO Funding May Increase! (July 27, 2004)
Michiel van der Klis wins NWO Spinoza prize! (June 24, 2004)
RXTE Cycle 10: Shaping the Next Decade of XTE Science! (June 14, 2004)
New Email Addresses to Contact the RXTE Science Operations Facility (SOF) (May 4, 2004)
Corrected Faint Background Models now Available (April 13, 2004)
March 2004 RXTE Paper of the Month (April 2004)
RXTE Sees Superburst Effect Accretion Disk in Real Time (March 18, 2004)
New! RXTE-related Astronomical Notices (March 17, 2004)
RXTE Catches Morphing Magnetar (January 28, 2004)
Recommended RXTE Cycle 10 Targets Released!
December 3, 2004
The Stage 1 review for RXTE Cycle 10 took place in November, 2004. Scientists from all over the world convened to discuss the 150 unique proposals that were submitted for consideration this year. The proposals and targets that were recommended to NASA Headquarters by the review panel are now available online. NOTE: Cycle 10 proposal numbers are distinguished by their leading two digits: 91NNN.
PIs should receive email notification of the results of their proposal, along with comments from the review panel, within the next several weeks. Congratulations to all successful Cycle 10 PIs!
Cycle 10 Deadline Past---Proposals are In!
September 28, 2004
The deadline for Cycle 10 proposal submission was Monday, September 20, 2004. We received 150 proposals in response to the call for proposals as part of ROSS-04. A total of over 61 Mega- seconds observing time was requested, for an oversubscription factor of about 5.1. We are now preparing for the Stage 1 review, to be held in mid-November. PIs should be notified by mid-December and the list of recommended targets will be made available through the RXTE GOF Web site. We thank the X-ray community for your continued interest in RXTE!
RXTE & XMM Squeeze Neuton Star Equation of State
September 8, 2004
Dr. Tod Strohmeyer (NASA GSFC) and Adam Villarreal (graduate student, University of Arizona) used RXTE and XMM/Newton to obtain the best measurements yet of the mass and radius of a neutron star. Announcing their findings at the September High Energy Astrophysics Division (HEAD) meeting in New Orleans, Villarreal said, "Our results are really starting to put the squeeze on the neutron star equation of state." Read more at:
Goddard Space Flight Center Press Release:
Scientists Gain Glimpse of Bizarre Matter in Neutron Star
RXTE Cycle 10 Proposal Due Date Extended to September 20, 2004;GO Funding May Increase!
July 27, 2004
Regarding: AMENDMENT NO. 8 TO NASA RESEARCH ANNOUNCEMENT (NRA) ENTITLED RESEARCH OPPORTUNITIES IN SPACE SCIENCE 2004 (ROSS-04), NNH04ZSS001N RELEASED JANUARY 30, 2004.
NASA Headquarters has recently released an amendment to ROSS-04 concerning the RXTE Guest Investigator Program. The due date for proposals to the Rossi X-ray Timing Explorer RXTE Guest Investigator Program Cycle 10 described in Appendix A.8 is changed from Friday, September 10, 2004, to Monday, September 20, 2004. With this new deadline in place, there is now no conflict between the dates of the upcoming AAS HEAD meeting in New Orleans and the RXTE proposal deadline.You may see full text of the amendment to ROSS-04 .
Information regarding RXTE Cycle 10 proposal preparation and submission may be found on the RXTE Website.
Note that the Panel Report of the 2004 Senior Review of Astronomy and Physics MO&DA Programs recommended that RXTE's GO funding be enhanced. We expect that the amount of funding available to GOs will thus be increased somewhat in Cycle 10, though the exact amount is not known at this time.
As always, please send any questions to:xtehelp.
Michiel van der Klis wins NWO Spinoza prize!
June 24, 2004
Professor Michiel van der Klis, Professor of Astronomy at the Universiteit van Amsterdam Institute 'Anton Pannekoek', received the NWO Spinoza prize 2004 for his pioneering research into X-ray radiation from binary stars. In 1985 he clarified why X-ray radiation emitted by binary does not consist of stable pulses but instead of quasi-periodic oscillations. And in the 1990s his group hit the world headlines when they discovered the first X-ray star which rotated at 400 times per second around its axis. The existence of such a star had been predicted 16 years previously, but had not yet been proved." The NWO-Spinoza prize, which some regard as the 'Dutch Nobel Prize', is awarded by the Netherlands Organization for Scientific Research (NWO) to Dutch scientists who are at the very top of the research profession. The laureates are internationally renowned and are an inspiration to young scientists. Read some of Michiel's work:
RXTE Cycle 10: Shaping the Next Decade of XTE Science
June 14, 2004
Materials are now available to support PI's who wish to submit observing proposals for RXTE Cycle 10--- a component of NASA Headquarters' Research Opportunities in Space Science 2004 (ROSS-04). See our Proposals & Tools Page for all necessary instructions and steps for submitting a proposal. Notices of Intent are due on July 9, 2004. RXTE Cycle 10 proposal deadline is September 10, 2004. Cycle 10 observations commence around March 1, 2005 and will continue for 12 months. As was the case the last two years, this will be a two-stage review. Successful science PIs at US institutions will be invited to submit budget proposals at a date after the November 2004 science review. We encourage all interested scientists to propose your ideas for RXTE Cycle 10. As always, should you have questions during proposals preparation, contact the RXTE GOF for support. Good luck with your proposals!
New Email Addresses to Contact the RXTE Science Operations Facility (SOF)
May 4, 2004
The RXTE SOF email server has recently changed. RXTE users should update their addresses for communicating with the RXTE SOF to use the new address. In all cases, "xgo2.nascom.nasa.gov" or "xtesof.nascom.nasa.gov" should be replaced by "athena.gsfc.nasa.gov".The affected addresses are xteplan, xtesof, and xtetoo. Please update your address book as follows (examples):
Corrected Faint Background Models now Available
April 13, 2004
New faint models are being released that correct an oversubtraction of background rates late in all Epochs, and eliminate small trends. One model is mission-long, the others contain the same data, but separated out into individual gain Epochs. The details of the faint model are the same in both representations; the mission-long model is made available to simplify the analysis tasks for users. See the PCA Digest page for links to the models, and details of the correction.
RXTE Paper of the Month!
March 2004 Paper of the Month:
I. M. McHardy , I. E. Papadakis , P. Uttley , M. J. Page , and K. O. Mason
Monthly Notices of the Royal Astronomical Society, v348:783-801, 2004 March
For more RXTE-related publications, see the:
RXTE Sees Superburst Effect Accretion Disk in Real Time
March 18, 2004
RXTE observations of a superburst halfway across the galaxy have provided scientists with their first-ever look at the moment-to-moment changes the burst inflicted on the nearby accretion disk. David Ballantyne (CITA at University of Toronto) and Tod Strohmayer (NASA/GSFC) report their findings in the Feb. 20 issue of the Astrophysical Journal Letters. The superburst acted like a "spotlight", illuminating the inner-most region of the accretion disk, and allowing RXTE to capture spectra of the disk every few seconds. According to Ballantyne, "This is the first time we have been able to watch the inner regions of an accretion disk, in this case literally a few miles from the neutron star's surface, change its structure in real time."
For more information:
Goddard Space Flight Center Top Story (includes computer
New! RXTE-related Astronomical Notices
March 17, 2004
Now, the latest RXTE-related Astronomer's Telegrams, IAU Circulars, and GCN notices are only one click away: look for the blue "Astronomical Notices" button near the bottom of the RXTE GOF homepage. Clicking on it will take you to our "Latest RXTE-related Astronomical Notices" page, where you'll find RXTE-related ATELs, IAUCs, and GCN notices from the last 6 months. From there, you can also follow links to our archive of all RXTE-related notices, or the full archive of all RXTE Publications (also known as the "RXTE Results" page). Check them out!
RXTE Catches Morphing Magnetar
January 28, 2004
Alaa Ibrahim and coworkers discovered the first transient magnetar, XTE J1810-197, serendipitously during an observation of another magnetar nearby. Magnetars, a rare class of extremely magnetic neutron stars, are thought to be born with ultrahigh magnetic fields. The transient nature of this magnetar supports the theory that these objects may at first be too dim to see, but eventually brighten as the spinning star slows down and releases energy. Studying the history of XTE J1810-197 has involved several high energy observatories. Chandra was used to accurately pinpoint the location of the new object. Archival XTE data revealed that XTE J1810-197 brightened by a factor of about 100 around January 2003. Finally, the archives of the earlier international missions ROSAT and ASCA were mined, revealing the source as a dim, isolated neutron star as early as 1990. This exciting new development in neutron star evolution was presented at the Winter 2004 AAS Meeting in Atlanta, Georgia.
See this story on the Goddard Homepage.
If you have a question about RXTE, please send email to one of our help desks.