Search Results - "ROGERS, Alan E. E"

Refine Results
  1. 1

    An absorption profile centred at 78 megahertz in the sky-averaged spectrum by Bowman, Judd D., Rogers, Alan E. E., Monsalve, Raul A., Mozdzen, Thomas J., Mahesh, Nivedita

    Published in Nature (London) (01-03-2018)
    “…The 21-cm absorption profile is detected in the sky-averaged radio spectrum, but is much stronger than predicted, suggesting that the primordial gas might have…”
    Get full text
    Journal Article
  2. 2
  3. 3
  4. 4

    Reply to Hills et al by Bowman, Judd D., Rogers, Alan E. E., Monsalve, Raul A., Mozdzen, Thomas J., Mahesh, Nivedita

    Published in Nature (London) (01-12-2018)
    “…[...]their choice to use it over the full band was not justified. Judd D. Bowman1·, Alan E. E. Rogers2, Raul A. Monsalve1'3'4'5'6, Thomas J. Mozdzen1 &…”
    Get full text
    Journal Article
  5. 5

    Results from EDGES High-band. I. Constraints on Phenomenological Models for the Global 21 cm Signal by Monsalve, Raul A., Rogers, Alan E. E., Bowman, Judd D., Mozdzen, Thomas J.

    Published in The Astrophysical journal (20-09-2017)
    “…We report constraints on the global 21 cm signal due to neutral hydrogen at redshifts 14.8 ≥ z ≥ 6.5 . We derive our constraints from low-foreground…”
    Get full text
    Journal Article
  6. 6

    Results from EDGES High-Band. III. New Constraints on Parameters of the Early Universe by Monsalve, Raul A., Fialkov, Anastasia, Bowman, Judd D., Rogers, Alan E. E., Mozdzen, Thomas J., Cohen, Aviad, Barkana, Rennan, Mahesh, Nivedita

    Published in The Astrophysical journal (10-04-2019)
    “…We present new constraints on parameters of cosmic dawn and the epoch of reionization derived from the EDGES High-Band spectrum (90-190 MHz). The parameters…”
    Get full text
    Journal Article
  7. 7

    Results from EDGES High-band. II. Constraints on Parameters of Early Galaxies by Monsalve, Raul A., Greig, Bradley, Bowman, Judd D., Mesinger, Andrei, Rogers, Alan E. E., Mozdzen, Thomas J., Kern, Nicholas S., Mahesh, Nivedita

    Published in The Astrophysical journal (10-08-2018)
    “…We use the sky-average spectrum measured by EDGES High-band (90-190 MHz) to constrain parameters of early galaxies independent of the absorption feature at 78…”
    Get full text
    Journal Article
  8. 8

    Detecting Flaring Structures in Sagittarius A with High-Frequency VLBI by Doeleman, Sheperd S, Fish, Vincent L, Broderick, Avery E, Loeb, Abraham, Rogers, Alan E. E

    Published in The Astrophysical journal (10-04-2009)
    “…The super-massive black hole candidate, Sagittarius A*, exhibits variability from radio to X-ray wavelengths on timescales that correspond to <10 Schwarzschild…”
    Get full text
    Journal Article
  9. 9

    CALIBRATION OF THE EDGES HIGH-BAND RECEIVER TO OBSERVE THE GLOBAL 21 cm SIGNATURE FROM THE EPOCH OF REIONIZATION by Monsalve, Raul A., Rogers, Alan E. E., Bowman, Judd D., Mozdzen, Thomas J.

    Published in The Astrophysical journal (20-01-2017)
    “…ABSTRACT The EDGES High-Band experiment aims to detect the sky-average brightness temperature of the 21 cm signal from the epoch of reionization in the…”
    Get full text
    Journal Article
  10. 10

    Toward Empirical Constraints on the Global Redshifted 21 cm Brightness Temperature During the Epoch of Reionization by Bowman, Judd D, Rogers, Alan E. E, Hewitt, Jacqueline N

    Published in The Astrophysical journal (20-03-2008)
    “…Preliminary results are presented from a simple, single-antenna experiment designed to measure the all-sky radio spectrum between 100 and 200 MHz. The system…”
    Get full text
    Journal Article
  11. 11

    Low-frequency Radio Recombination Lines Away from the Inner Galactic Plane by Vydula, Akshatha K., Bowman, Judd D., Lewis, David, Crawford, Kelsie, Kolopanis, Matthew, Rogers, Alan E. E., Murray, Steven G., Mahesh, Nivedita, Monsalve, Raul A., Sims, Peter, Samson, Titu

    Published in The Astronomical journal (01-01-2024)
    “…Abstract Diffuse radio recombination lines (RRLs) in the Galaxy are possible foregrounds for redshifted 21 cm experiments. We use EDGES drift scans centered at…”
    Get full text
    Journal Article
  12. 12
  13. 13

    Ground-based Ku-band microwave observations of ozone in the polar middle atmosphere by Newnham, David A, Clilverd, Mark A, Clark, William D. J, Kosch, Michael, Verronen, Pekka T, Rogers, Alan E. E

    Published in Atmospheric measurement techniques (20-04-2022)
    “…Ground-based observations of 11.072 GHz atmospheric ozone (O3) emission have been made using the Ny-Ålesund Ozone in the Mesosphere Instrument (NAOMI) at the…”
    Get full text
    Journal Article
  14. 14

    Adapting a Cryogenic Sapphire Oscillator for Very Long Baseline Interferometry by Doeleman, Sheperd, Mai, Tao, Rogers, Alan E. E., Hartnett, John G., Tobar, Michael E., Nand, Nitin

    “…Extension of very long baseline interferometry (VLBI) to observing wavelengths shorter than 1.3 mm provides exceptional angular resolution (∼20 μas ∼ 20     μ…”
    Get full text
    Journal Article
  15. 15

    One-Port Direct/Reverse Method for Characterizing VNA Calibration Standards by Monsalve, Raul A., Rogers, Alan E. E., Mozdzen, Thomas J., Bowman, Judd D.

    “…This paper introduces a one-port method for estimating model parameters of vector network analyzer calibration standards. The method involves measuring the…”
    Get full text
    Journal Article
  16. 16

    Detecting Changing Polarization Structures in Sagittarius A with High Frequency VLBI by Fish, Vincent L, Doeleman, Sheperd S, Broderick, Avery E, Loeb, Abraham, Rogers, Alan E. E

    Published in The Astrophysical journal (01-12-2009)
    “…Sagittarius A* is the source of near infrared, X-ray, radio, and (sub)millimeter emission associated with the supermassive black hole at the Galactic Center…”
    Get full text
    Journal Article
  17. 17

    A lower limit of Δz > 0.06 for the duration of the reionization epoch by Bowman, Judd D., Rogers, Alan E. E.

    Published in Nature (London) (09-12-2010)
    “…A new look at the reionization of the Universe A new generation of radio telescopes is making it possible to observe the redshifted 21-centimetre spectral line…”
    Get full text
    Journal Article
  18. 18

    Estimating Solar Flux Density at Low Radio Frequencies Using a Sky Brightness Model by Oberoi, Divya, Sharma, Rohit, Rogers, Alan E. E.

    Published in Solar physics (01-06-2017)
    “…Sky models have been used in the past to calibrate individual low radio frequency telescopes. In this article we generalize this approach from a single antenna…”
    Get full text
    Journal Article
  19. 19
  20. 20

    A Bayesian approach to modelling spectrometer data chromaticity corrected using beam factors – I. Mathematical formalism by Sims, Peter H, Bowman, Judd D, Mahesh, Nivedita, Murray, Steven G, Barrett, John P, Cappallo, Rigel, Monsalve, Raul A, Rogers, Alan E E, Samson, Titu, Vydula, Akshatha K

    “…ABSTRACT Accurately accounting for spectral structure in spectrometer data induced by instrumental chromaticity on scales relevant for detection of the 21-cm…”
    Get full text
    Journal Article