Latest Space News
Tue, 29 Sep 2020 16:00:57 +0000
Swarm Technologies announced prices for its satellite communications products Sept. 29, including data services starting at $5 per device per month. SpaceNews
Tue, 29 Sep 2020 14:47:52 +0000
In addition to better preparing us for the next pandemic, or teaching us how to prevent it altogether, reflection also reveals lessons we can apply to other issues we face as a collective society, writes Mike Lindsay. SpaceNews
Tue, 29 Sep 2020 11:46:50 +0000
Canadian startup Kepler Communications launched Sept. 28 the first two satellites built in its own facility as the company ramps up its plans to deploy a constellation for data and Internet of Things services. SpaceNews
Tue, 29 Sep 2020 00:05:17 +0000
NASA says they are still not sure of the source of a small air leak on the International Space Station after the crew spent a second weekend confined to a single module there. SpaceNews
Mon, 28 Sep 2020 14:50:51 +0000
Congress for years has been critical of the U.S. Air Force's weather satellite programs. SpaceNews
Mon, 28 Sep 2020 11:19:12 +0000
NASA has selected SpaceX to launch a space science mission and several secondary payloads, the latest in a series of wins by SpaceX for NASA science missions. SpaceNews
Mon, 28 Sep 2020 09:41:19 +0000
NASA and the U.S. Geological Survey plan to issue a Request for Information by the end of the year on instrumentation and platforms for Landsat Next, the Earth observation system to follow Landsat 9. SpaceNews
Sun, 27 Sep 2020 20:18:20 +0000
China added to its Earth observation capabilities with the clandestine launch of two satellites from Taiyuan late Saturday. SpaceNews
Sat, 26 Sep 2020 11:47:17 +0000
One of the largest hurdles is coming up with a set of legal rules for governing behavior in outer space. The issue of celestial property rights is tricky. SpaceNews
Fri, 25 Sep 2020 23:39:59 +0000
Italy is the latest country to sign an agreement to cooperate with NASA on the Artemis human lunar exploration program, although the details of Italy’s participation have yet to be worked out. SpaceNews
Fri, 25 Sep 2020 22:52:45 +0000
HyImpulse completed the first hot-fire test of the company’s 16,800-pounds-force hybrid rocket motor on Sept. 15. Credit: HyImpulse SpaceNews
Fri, 25 Sep 2020 20:28:16 +0000
NASA has delayed the launch of a mission to Saturn’s moon Titan by a year, citing budget challenges created by the coronavirus pandemic. SpaceNews
Fri, 25 Sep 2020 17:39:36 +0000
Gwynne Shotwell: "We are pleased that they see the benefits of the technology.” SpaceNews
Fri, 25 Sep 2020 15:40:01 +0000
SAR satellites can gather data day and night, but the resultant imagery is typically more expensive, less available, and more difficult to use than optical imagery. Technological advances are breaking down those barriers, positioning SAR for much more widespread adoption, according to experts. SpaceNews
Fri, 25 Sep 2020 11:36:42 +0000
The British government, seeking a replacement for the Galileo satellite navigation system, said it will consider alternatives to an original plan to develop its own satellite constellation. SpaceNews
Fri, 25 Sep 2020 10:51:12 +0000
Space Force leaders frequently remind audiences that the newest branch of the U.S. military will be a “digital service” on the leading edge of technology. SpaceNews
Thu, 24 Sep 2020 21:53:12 +0000
NASA is taking the next small step in its efforts to promote commercialization of low Earth orbit by flying a cosmetics company’s product to the International Space Station, a project that has prompted questions from one senator. SpaceNews
Thu, 24 Sep 2020 18:40:50 +0000
The 18th Space Control Squadron at Vandenberg Air Force Base is now providing “more meaningful” data on approximately 25,000 space objects. SpaceNews
Thu, 24 Sep 2020 17:51:41 +0000
As the House and Senate struggle with pandemic relief and other spending bills, there seems little opportunity for anything space-related to get through Congress. SpaceNews
Thu, 24 Sep 2020 17:47:31 +0000
Startups around the world continue building synthetic aperture radar (SAR) satellites even as the COVID-19 pandemic delays some launches. SpaceNews
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  • CV: PhD Student

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    Personal information
     Name:<withheld>
     Age:<withheld>
     Country:<withheld>
     Location:<withheld>
    Contact information
     Email:<withheld>
     Phone:<withheld>
     Mobile:<withheld>
    Candidate Profile
     Date Submitted:11-02-2013
     Last Modified:11-02-2013 (07:57)
    Job information
     Current job:PhD Student
     Employment Term:Temp/Contract
     Job location:Anywhere
     Date available:>3months
     Industry:Civil Agencies/International Organizations, Satellite Manufacturers and Subcontractors, Satellite Operators, , , Launch Systems, Business Services
     KeywordsPhD in astrophysics at Stanford University. Long term experience with astronomical data analysis and statistics.
    CV

    Personal

    Born on 29 November, 1984
    United States Citizen
    Speaks English (native) and German (fluent)



    Education

    Ph.D. Astrophysics, Stanford University, 2008-Present. Advisor: Steven Allen

    DAAD Research Fellowship, Max Planck Institute for Nuclear Physics, 2007-2008. Advisor: Werner Hofmann

    B.S. Physics and Mathematics, (Magna Cum Laude), Northwestern University, 2003-2007. Advisor: Melville Ulmer


    Awards and Fellowships

     German Academic Exchange Program (DAAD) Research Fellowship, 2007-2008
     Phi Beta Kappa Honors Society
     Outstanding Undergraduate Honors Thesis, Physics Department, Northwestern University, 2007



    Talks and Proceedings

     Ehlert, S.; et al,,  "X-ray Bright AGN in the Vicinity of Massive Galaxy Clusters", Half a Century of X-Ray Astronomy, Myknonos Island Greece, September 2012

     Ehlert, S.; et al., "Extreme AGN Feedback in the most X-ray luminous cooling cores: MACSJ1931.8-2634", Snowcluster, Snowbird UT, March 2010

     Becherini, Y.; Djannati-Atai, A.; Punch, M.; Bernl"{o}hr, K.; Ehlert, S. ; Masbou, J.; Moulin, E.; Arribas, M. Paz, "HESS-II reconstruction strategy and performance in the low-energy (20-150 GeV) domain", 4th Meeting on High Energy Gamma Ray Astronomy , Heidelberg Germany, August 2008

    Ehlert, S.; and Ulmer, M.P., "Iron Abundance and Temperature Gradients in High Redshift Galaxy Clusters", Meeting of the American Astronomical Society , Seattle WA, January 2007

    Successful Observing Proposals


    Spring 2012: ``An inside view: Does the fraction of X-ray AGN track the quenching of star formation in cluster galaxies?'', {it ESO VLT Period 90}, Anja von der Linden PI, 42 hours, 10 clusters

     

    Spring 2012: ``Tracing a Merger from Start to Finish in Abell 85'' {it Chandra Cycle 14} joint with {it Suzaku}, Steve Allen Funding PI, Steven Ehlert Observing Co-I, 160+100 ks. 

    Fall 2010: ``The Deep Impact of AGN Feeback in M84'' {it XMM-Newton Cycle 10} joint with {it VLT}, Steven Ehlert PI, 130 ks+2 hours. 

    Fall 2010: ``MACS J1931.8-2634: Destruction of a cluster cool core in technicolor'', {it ESO VLT Period 87A}, Anja von der Linden PI, 15 hours

    Teaching


    Center for Teaching and Learning Liason, Physics Department, 2012-2013 

    Teaching Assistant Mentor, Physics Department, 2011-2012

    Spring Quarter 2012: Physics 100, Teaching Assistant

    Spring Quarter 2011: Physics 100/301, Teaching Assistant

     Fall Quarter 2009: Physics 45 (Thermodynamics and Optics), Head Teaching Assistant

     Winter Quarter 2009: Physics 41 (Mechanics), Section Teaching Assistant.

    Further details on Teaching Positions:


    The Physics 40 series (41,43,and 45) at Stanford is a series of introductrory Physics courses that require the use of calculus. These courses are mandatory for young physics majors and most fields of engineering, and typical enrollment is approximately 300-400 students per quarter. Teaching assistants are typically given two sections of 18 students each for whom they supervise in a weekly 1 hour recitation section. The section teaching assistants are also responsible for grading problem sets and being the first contact for students when questions or concerns arise. All of the section teaching assistants are supervised by a head teaching assistant who communicates more directly with the instructor. The head teaching assistant's responsibilities include writing problem sets and examinations, providing vision and guidance to the section teaching assistants, and managing the unique administrative tasks that arise in a class of 300+ students.


    Physics 100 at Stanford is laboratory-based observational astronomy course utilizing the 0.4 and 0.6 m telescopes at the Stanford Student Observatory. Every other year the course is also open to graduate students (known as Physics 301). We teach the fundamentals of observational astronomy, statistics, and data analysis using an analysis pipeline built from scratch combined with new and archival telescope data. The course culminates with the students proposing and performing their own original research projects utilizing telescope data from the Stanford Student Observatory or other public archives. Previous projects of note include reconstructing satellite orbits from CCD image streaks and the detections of an extra-solar planet using the transit method.     


    The Physics Department at Stanford, in order to make their instruction more effective for undergraduate students, works closely with the Center for Teaching and Learning (CTL) at Stanford University in order to maintain a high standard of teaching across all classes. One of the key components of this program is the Teaching Assistant (TA) Mentor program, where experienced TA's are assigned to help provide insight and advice to new TA's as needed. Additionally, the Mentor TA's also perform mid-quarter evaluations of their mentee TA's, which allow the new TA's the opportunity to adjust their teaching strategies before the end of the quarter. One Mentor TA in particular is chosen to represent the department as the liason to the CTL, and help promote the exchange of ideas between the Physics Department and CTL. The CTL liason also, in conjunction with the CTL, helps develop new teaching approaches for the Physics department based on the departments particular needs and previous experience.

     
    Additional Service

    Representative to Congressional Offices, SLAC User's Organization, SLAC National Accelerator Laboratory



    Further Details on Service Positions:


    In March of 2012, I served as a member of the Slac Users Organization (SLUO, SLAC National Accelerator Laborary, Menlo Park CA) on their annual trip to Washington D.C. in order to thank members of the United States Congress for their continued support for high energy particle physics and astrophysics. Additionally, we spoke to the Congressional offices to emphasize the importance of stable, healthy long-term funding to our community and the United States at large and the broader impacts that cutting edge pure science research. This trip is undertaken every year along with representatives from Fermilab and the US users of the Large Hadron Collider. Over the course of two days in Washington DC, I spoke with 13 Congressional Offices in the U.S. House of Representatives and Senate as well as directors of the National Science Foundation and Department of Energy.   




    Skills and Competencies

    Computer Languages: Bash and C-Shell, Python, IDL, C++

    Machine Shop: Bandsaw, Lathe, Milling Machine



    Publications

    Journal Articles
    All of these articles have been accepted for publication in peer-reviewed journals.


    {bf Ehlert, S.}; Allen, S.W.; von der Linden, A.; Werner, N.; Simionescu, Kenney, J.D.P.; A.; Million, E. T.; Finoguenov, A.; ``Ripping at the Seams: The Network of Stripped Gas Surrounding M86'', accepted by MNRAS, arXiv # 1212.3612

    {bf Ehlert, S.}; Allen, S.W.; Brandt, W.N.; Xue, Y.Q.; Luo, B.; von der Linden, A.; Mantz, A.; and  Morris, R. G. ``X-ray Bright Active Galactic Nuclei in Massive Galaxy Clusters I: Number Counts and Spatial Distribution'', Monthly Notices of the Royal Astronomical Society, Volume 428, Issue 4

    {bf Ehlert, S.}; Allen, S. W.; von der Linden, A.; Simionescu, A.; Werner, N.; Taylor, G. B.; Gentile, G.; Ebeling, H.; Allen, M. T.; Applegate, D.; Dunn, R. J. H.; Fabian, A. C.; Kelly, P.; Million, E. T.; Morris, R. G.; Sanders, J. S.; Schmidt, R. W. ``Extreme active galactic nucleus feedback and cool-core destruction in the X-ray luminous galaxy cluster MACS J1931.8-2634'', Monthly Notices of the Royal Astronomical Society 2011, Volume 411, Issue 3

    {bf Ehlert, S.}; Ulmer, M. P. ``The radial dependence of temperature and iron abundance. Galaxy clusters from z = 0.14 to z = 0.89'', Astronomy and Astrophysics 2009, Volume 503, Issue 1

    Ulmer, M. P.; Graham, M. E.; Vaynman, S.; Echt, J.; Farber, M.; { bf Ehlert, S.}; Varlese, S. ``Progress Toward Light Weight High Angular Resolution Multilayer Coated Optics'', Experimental Astronomy 2005, Volume 20, Issue 1-3

       
     



    Journal Articles Near Completion
    These articles have either been submitted for publication or will soon be. All are in the final stages of preparation and the results in these papers are robust. You can find preprints at
    href{http://www.stanford.edu/~sehlert/cv.html}{tt http://www.stanford.edu/textasciitilde sehlert/cv.html}. 


    {bf Ehlert, S.}; Allen, S.W.; Brandt, W.N.; Xue, Y.Q.; Luo, B.; von der Linden, A.; Mantz, A.; and  Morris, R. G. ``X-ray Bright Active Galactic Nuclei in Massive Galaxy Clusters II: The fraction of galaxies hosting X-ray AGN''

    {bf Ehlert, S.}; Allen, S.W.; Brandt, W.N.; Xue, Y.Q.; Luo, B.; von der Linden, A.; Mantz, A.; and  Morris, R. G. ``X-ray Bright Active Galactic Nuclei in Massive Galaxy Clusters III:  The near-universal influence of the cluster environment''




     


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