Latest Space News
Sun, 21 Apr 2019 15:54:11 +0000
Griffin has scoffed at SDA naysayers. “I’m not personally trying to shake up anybody or anything." SpaceNews.com
Sat, 20 Apr 2019 23:10:02 +0000
A SpaceX Crew Dragon spacecraft suffered what the company said was an “anomaly” during static fire tests of its abort engines April 22, dealing a setback to the company’s plans to fly a crewed test flight later this year. SpaceNews.com
Fri, 19 Apr 2019 23:09:19 +0000
The WGS-11 satellite is being funded with money that Congress inserted into the fiscal year 2018 budget. SpaceNews.com
Fri, 19 Apr 2019 22:45:34 +0000
Italian startup Leaf Space wants to triple the number of ground station locations it has by late next year, citing customer demand for providing communications services to small satellites. SpaceNews.com
Fri, 19 Apr 2019 20:04:50 +0000
Air Force Chief of Staff Gen. Goldfein: 'Our goal is to prevent and deter conflict' SpaceNews.com
Fri, 19 Apr 2019 17:25:55 +0000
Rocket Lab is preparing to launch in late April or early May three U.S. military satellites including the Army Harbinger mission, a test to show whether an inexpensive commercial satellite equipped with a synthetic aperture radar can quickly deliver Earth imagery to soldiers. SpaceNews.com
Fri, 19 Apr 2019 11:13:19 +0000
Virgin Galactic’s chief pilot believes the company will be able to go through the remainder of its SpaceShipTwo test program fairly quickly once test flights of the suborbital spaceplane resume. SpaceNews.com
Thu, 18 Apr 2019 21:29:55 +0000
Fleet operator Intelsat said its first high throughput satellite, Intelsat-29e, is a “total loss” after attempts to save the malfunctioning satellite proved unsuccessful. SpaceNews.com
Thu, 18 Apr 2019 18:12:08 +0000
The European Space Agency’s 22 member states agreed April 17 to a workaround to get Ariane 6 production in full swing despite a dearth of public sector launch contracts. SpaceNews.com
Thu, 18 Apr 2019 14:38:32 +0000
Rajanik Mark, Satixfy’s chief operating officer, said the company has created its own chipsets that it can build in-house to bring down the cost of antenna modules that are built into full user terminals. SpaceNews.com
Thu, 18 Apr 2019 13:28:27 +0000
An independent report concluded that NASA has no chance of sending humans to Mars by 2033, with the earliest such a mission could be flown being the late 2030s. SpaceNews.com
Wed, 17 Apr 2019 21:26:06 +0000
A Northrop Grumman Antares rocket successfully launched a Cygnus spacecraft April 17 carrying nearly three and a half tons of cargo bound for the International Space Station. SpaceNews.com
Wed, 17 Apr 2019 19:20:47 +0000
Iridium moved closer to launching an emergency maritime communications service by signing a public services agreement with the International Mobile Satellite Organization. SpaceNews.com
Wed, 17 Apr 2019 15:59:14 +0000
NASA has proposed to build a lunar orbiting space station, called the lunar Gateway, to use as a base for lunar exploration. This plan is severely defective. SpaceNews.com
Wed, 17 Apr 2019 14:43:00 +0000
Two NASA astronauts will get extended stays on the International Space Station, NASA announced April 17, a move intended to support research on long-duration spaceflight and address uncertainties in the availability of commercial crew vehicles. SpaceNews.com
Wed, 17 Apr 2019 12:38:32 +0000
Machine learning and other artificial intelligence techniques could help forecasters get more out of these data by improving accuracy and speed in almost every step of turning satellite observations into actionable forecasts. SpaceNews.com
Wed, 17 Apr 2019 12:27:01 +0000
A letter sent to Shanahan questions DoD's decision to shift missions away from the Air Force Space and Missile Systems Center. SpaceNews.com
Wed, 17 Apr 2019 12:21:38 +0000
After four years of stealth mode, LyteLoop, a startup planning to store massive amounts of data by moving it continuously between satellites, is coming out of the shadows. SpaceNews.com
Wed, 17 Apr 2019 10:44:34 +0000
For many years, the Commercial Spaceflight Federation (CSF) and the Commercial Space Transportation Advisory Committee (COMSTAC) have recognized the importance of developing industry voluntary consensus standards. SpaceNews.com
Wed, 17 Apr 2019 02:35:46 +0000
SAS Global, in an April 15 notice to the Australian Stock Exchange, said it needs to raise 7.2 million Australian dollars ($5.2 million) to prevent further delays with its constellation of low Earth orbit satellites. SpaceNews.com
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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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