Results 101 to 110 of about 24,980 (214)

Modernization of NASA's Johnson Space Center Chamber: A Payload Transport Rail System to Support Cryogenic Vacuum Optical Testing of the James Webb Space Telescope (JWST) [PDF]

NASA is the mission lead for the James Webb Space Telescope (JWST), the next of the "Great Observatories", scheduled for launch in 2018. It is directly responsible for the integration and test (I&T) program that will culminate in an end-to-end cryo ...
Garcia, Sam, Homan, Jonathan, Speed, John   +2 more
core   +1 more source

On the Detection of Exorings in Reflected Light with JWST NIRCam

The Astronomical Journal
When directly imaging a cold-giant exoplanet hosting a ring system, the reflected light from the rings can outshine the planet’s thermal emission and reflected light in the near-infrared.
Rachel Bowens-Rubin, Mary Anne Limbach, Sam Hopper, Klaus Subbotina Stephenson, Matson Garza, Leigh N. Fletcher, Matthew Hedman   +6 more
doaj   +1 more source

Our History in the Stars [PDF]

John C. Mather is senior project director of NASA's James Webb Space Telescope (JWST), successor to the Hubble Telescope. Nearly cancelled in summer 2011 during a flurry of federal budget cuts, the project was fully funded by Congress in November 201l ...
Mather, John C.
core   +1 more source

Microlensing pulsars

, 2010
We investigate the possibilities that pulsars act as the lens in gravitational microlensing events towards the galactic bulge or a spiral arm. Our estimation is based on expectant survey and observations of FAST (Five hundred meter Aperture Spherical ...
A. Esamdin, Alcock, Carlberg, Glicenstein, Hansen, Hartman, Horvath, Johnston, Johnston, Keane, Lattimer, Lorimer, Lyne, McLaughlin, Nan, Narayan, Paczýnski, R. X. Xu, S. Dai, Schwarz, Smits, Smits, Udalski, Van Der Meer, Wex, Xu, Xu   +26 more
core   +1 more source

The Perfect Host: JWST Cepheid Observations in a Background-free Type Ia Supernova Host Confirm No Bias in Hubble-constant Measurements

The Astrophysical Journal Letters
Cycle 1 JWST observations of Cepheids in Type Ia supernova (SN Ia) hosts resolved their red-giant-dominated near-infrared backgrounds, sharply reducing crowding and showing that photometric bias in lower-resolution Hubble Space Telescope (HST) data does ...
Adam G. Riess, Siyang Li, Gagandeep S. Anand, Wenlong Yuan, Louise Breuval, Stefano Casertano, Lucas M. Macri, Dan Scolnic, Yukei S. Murakami, Alexei V. Filippenko, Thomas G. Brink   +10 more
doaj   +1 more source

The James Webb Space Telescope Absolute Flux Calibration. IV. Near-Infrared Imager and Slitless Spectrograph Imaging

The Astronomical Journal
The absolute flux calibration of the Near-infrared Imager and Slitless Spectrograph (NIRISS) imaging modes is derived using observations of photometric standards with the James Webb Space Telescope (JWST).
Kevin Volk, Paul Goudfrooij
doaj   +1 more source

Deconvolution of JWST/MIRI Images: Applications to an Active Galactic Nucleus Model and GATOS Observations of NGC 5728

The Astronomical Journal
The superb image quality, stability, and sensitivity of JWST permit deconvolution techniques to be pursued with a fidelity unavailable to ground-based observations. We present an assessment of several deconvolution approaches to improve image quality and
M. T. Leist, C. Packham, D. J. V. Rosario, D. A. Hope, A. Alonso-Herrero, E. K. S. Hicks, S. Hönig, L. Zhang, R. Davies, T. Díaz-Santos, O. González-Martín, E. Bellocchi, P. G. Boorman, F. Combes, I. García-Bernete, S. García-Burillo, B. García-Lorenzo, H. Haidar, K. Ichikawa, M. Imanishi, S. M. Jefferies, Á. Labiano, N. A. Levenson, R. Nikutta, M. Pereira-Santaella, C. Ramos Almeida, C. Ricci, D. Rigopoulou, W. Schaefer, M. Stalevski, M. J. Ward, L. Fuller, T. Izumi, D. Rouan, T. Shimizu   +34 more
doaj   +1 more source

Undermassive Host Galaxies of Five z ∼ 6 Luminous Quasars Detected with JWST

The Astrophysical Journal
We measure host galaxy stellar masses for a sample of five luminous quasars at z ∼ 5–7. Using JWST/NIRCam medium-band images of nearby point-spread function reference stars, we carefully subtract the contribution from the quasar light to place upper and ...
Meredith A. Stone, Jianwei Lyu, George H. Rieke, Stacey Alberts, Kevin N. Hainline   +4 more
doaj   +1 more source

The James Webb Space Telescope: Capabilities for Exoplanet Science [PDF]

, 2011
The James Webb Space Telescope (JWST) is a large aperture (6.5 meter), cryogenic space telescope with a suite of near and mid-infrared instruments covering the wavelength range of 0.6 micron to 28 micron.
Clampin, Mark
core   +1 more source

GRB 221009A: James Webb Space Telescope Observations

, 2022
We observed the afterglow of GRB 221009A (Dichiara et al., GCN 32632; Kennea & Williams, GCN 32635; Bissaldi et al., GCN 32637; Veres et al., GCN 32636) with the James Webb Space Telescope on 22 October 2022, approximately 13 days after the Fermi/GBM trigger.
Levan, A.J., Barclay, T., Burns, E., Cenko, S.B., Chrimes, A.A., D'Avanzo, P., D’Elia, V., Della Valle, M., de Ugarte Postigo, A., Fong, W., Fruchter, A.S., Gompertz, B.P., Hedges, C.L., Heintz, K.E., Izzo, L., Kann, D.A., Kennea, J.A., Floc'h, E.Le, Malesani, D.B., Melandri, A., Metzger, B.D., Mullally, S.E., Piranomonte, S., Ravasio, M.E., Racusin, J.L., Rastinejad, J.C., Salvaterra, R., Sbarufatti, B., Schneider, B., Starling, R.L.C., Tanvir, N.R., Thoene, C.C., Wijers, R.A.M.J., Xu, D.   +33 more
openaire   +1 more source