X-ray trigonometric parallax/Quiz

< X-ray trigonometric parallax
VLA 90-cm wavelength image, adapted from LaRosa et al. (2000), with the locations of Sgr A*, Sgr B2, and J1745–2820 indicated. Credit: M. J. Reid, K. M. Menten, X. W. Zheng, A. Brunthaler, and Y. Xu.

X-ray trigonometric parallax is a lecture and an article about the theoretical possibility of using higher resolution X-ray detectors to measure stellar parallaxes. It is also a mini-lecture for a quiz section as part of the department of astronomy course on the principles of radiation astronomy.

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Quiz

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Ignore the questions' coefficients:

1. True or False, Distance measurement by parallax is a special case of the principle of triangulation.

TRUE
FALSE

2. Trigonometric parallax involves which of the following?

parsecs
reciprocal of parallax
arcseconds
apparent changes in position
lines of sight

3. Copernicus's theory provided a strikingly simple explanation for the apparent retrograde motions of the planets—namely as

displacements.

4. Radiation phenomena associated with trigonometric parallax are

gamma-ray trigonometric parallax distances < 0.4 kpc
X-ray trigonometric parallax distances good to 2 pc
ultraviolet trigonometric parallax is good to ± 7 pc
visual trigonometric parallax distances good to about 3 kpc
infrared trigonometric parallax with an accuracy of 120 µas
radio trigonometric parallax distances good at least to 1.86 kpc

5. Complete the text:

Trigonometric parallax measurements of pulsars are the reliable .

6. Complete the text:

Match up the type of trigonometric parallax with each of the possibilities below:
visual parallax - A
distribution function of the errors in distance - B
VLBA - C
Cygnus X-1 - D
pulse times of arrival - E
ultraviolet trigonometric parallax - F
optical annual parallax (HST) - G
continuum 'fixed' radio sources J1953+3537 and J1957+3338 .
Vela pulsar .
skewed due to non-linearity .
cloud top height .
Sgr B2M and Sgr B2N .
PSRs J1744−1134 and J1024−0719 detected at X-ray energies
χ Cyg 144 ± 25 pc (Stein 1991) .

7. Complete the text:

Match up the trigonometric parallax phenomena with the image:
stellar parallax motion - A
Very Long Baseline Array - B
radio continuum - C
Chandra X-ray Observatory spatial resolution HRC-I ~ 0.5 arcsec - D
WD 0346+246 has a trigonometric parallax measurement - E
Very Large Telescope - F
Proxima xray.jpg
.
Stellarparallax2.svg
.
FORS2 image of DE1520-44.jpg
.
Continuum Sources.jpg
.
SSPM J2231-7514.jpg
Sgr B2M.jpg
.

8. Which of the following is not related directly to an astronomical trigonometric parallax associated with Geminga?

optical trigonometric parallax
the Fermi Gamma-ray Space Observatory
measurements of radio pulsars
only available for the nearby pulsars
distance value of 0.25 +0.12 or −0.06 kpc

9. True or False, For larger and trigonometrically less reliable distances, use the Wilson-Bappu magnitudes.

TRUE
FALSE

10. Which of the following is not an astronomical trigonometric parallax or derived from it?

Hipparcos mission (ESA 1997), π = 15.15 ± 3.24 mas
independent observational constraint for DA white dwarfs
parallax distance of 357 +43 or −35 pc
angular diameter comparison
distance estimates
the range of an artificial satellite

Your score is 0 / 0

Research

Hypothesis:

  1. It is possible using X-ray trigonometric parallax to fix the position of the Sun.

Control groups

This is an image of a Lewis rat. Credit: Charles River Laboratories.

The findings demonstrate a statistically systematic change from the status quo or the control group.

“In the design of experiments, treatments [or special properties or characteristics] are applied to [or observed in] experimental units in the treatment group(s).[1] In comparative experiments, members of the complementary group, the control group, receive either no treatment or a standard treatment.[2]"[3]

Proof of concept

Def. a “short and/or incomplete realization of a certain method or idea to demonstrate its feasibility"[4] is called a proof of concept.

Def. evidence that demonstrates that a concept is possible is called proof of concept.

The proof-of-concept structure consists of

  1. background,
  2. procedures,
  3. findings, and
  4. interpretation.[5]

Proof of technology

"[T]he objective of a proof of technology is to determine the solution to some technical problem, such as how two systems might be integrated or that a certain throughput can be achieved with a given configuration."[6]

Def.

  1. "[a]n original object or form which is a basis for other objects, forms, or for its models and generalizations",[7]
  2. "[a]n early sample or model built to test a concept or process",[7] or
  3. "[a]n instance of a category or a concept that combines its most representative attributes"[7] is called a prototype.

Def. "[t]o test something using the conditions that it was designed to operate under, especially out in the real world instead of in a laboratory or workshop"[8] is called "field-test", or a field test.

A "proof-of-technology prototype ... typically implements one critical scenario to exercise or stress the highest-priority requirements."[9]

"[A] proof-of-technology test demonstrates the system can be used"[10].

"The strongest proof of technology performance is based on consistency among multiple lines of evidence, all pointing to similar levels of risk reduction."[11]

See also

References

  1. Klaus Hinkelmann, Oscar Kempthorne (2008). Design and Analysis of Experiments, Volume I: Introduction to Experimental Design (2nd ed.). Wiley. ISBN 978-0-471-72756-9. http://books.google.com/?id=T3wWj2kVYZgC&printsec=frontcover.
  2. R. A. Bailey (2008). Design of comparative experiments. Cambridge University Press. ISBN 978-0-521-68357-9. http://www.cambridge.org/uk/catalogue/catalogue.asp?isbn=9780521683579.
  3. "Treatment and control groups, In: Wikipedia". San Francisco, California: Wikimedia Foundation, Inc. May 18, 2012. Retrieved 2012-05-31.
  4. "proof of concept, In: Wiktionary". San Francisco, California: Wikimedia Foundation, Inc. November 10, 2012. Retrieved 2013-01-13.
  5. Ginger Lehrman and Ian B Hogue, Sarah Palmer, Cheryl Jennings, Celsa A Spina, Ann Wiegand, Alan L Landay, Robert W Coombs, Douglas D Richman, John W Mellors, John M Coffin, Ronald J Bosch, David M Margolis (August 13, 2005). "Depletion of latent HIV-1 infection in vivo: a proof-of-concept study". Lancet 366 (9485): 549-55. doi:10.1016/S0140-6736(05)67098-5. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1894952/. Retrieved 2012-05-09.
  6. "Proof of concept, In: Wikipedia". San Francisco, California: Wikimedia Foundation, Inc. December 27, 2012. Retrieved 2013-01-13.
  7. 1 2 3 "prototype, In: Wiktionary". San Francisco, California: Wikimedia Foundation, Inc. December 8, 2013. Retrieved 2014-01-03.
  8. "field-test, In: Wiktionary". San Francisco, California: Wikimedia Foundation, Inc. August 5, 2012. Retrieved 2013-01-13.
  9. A. Liu; I. Gorton (March/April 2003). "Accelerating COTS middleware acquisition: the i-Mate process". Software, IEEE 20 (2): 72-9. doi:10.1109/MS.2003.1184171. http://cin.ufpe.br/~redis/intranet/bibliography/middleware/liu-cots03.pdf. Retrieved 2012-02-15.
  10. Rhea Wessel (January 25, 2008). "Cargo-Tracking System Combines RFID, Sensors, GSM and Satellite". RFID Journal: 1-2. http://www.rfidjournal.com/article/pdf/3870/1/1/rfidjournal-article3870.PDF. Retrieved 2012-02-15.
  11. P. Suresh, C. Rao, M.D. Annable and J.W. Jawitz (August 2000). E. Timothy Oppelt. ed. [http://www.afcee.af.mil/shared/media/document/AFD-071003-081.pdf#page=108 In Situ Flushing for Enhanced NAPL Site Remediation: Metrics for Performance Assessment, In: Abiotic In Situ Technologies for Groundwater Remediation Conference]. Cincinnati, Ohio: U.S. Environmental Protection Agency. pp. 105. http://www.afcee.af.mil/shared/media/document/AFD-071003-081.pdf#page=108. Retrieved 2012-02-15.

External links

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Development status: this resource is experimental in nature.
Educational level: this is a research resource.
Resource type: this resource is a quiz.
Subject classification: this is an astronomy resource.
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