Results 81 to 90 of about 13,579 (182)

In-field Phasing at the Upgraded GMRT

The Astrophysical Journal
In time-domain radio astronomy with arrays, voltages from individual antennas are added together with proper delay and fringe correction to form the beam in real time.
Sanjay Kudale, Jayanta Roy, Jayaram N. Chengalur, Shyam Sharma, Sangita Kumari   +4 more
doaj   +1 more source

A Pulsar Time Scale Based on Parkes Observations in 1995--2010

, 2018
Timing of highly stable millisecond pulsars provides the possibility of independently verifying terrestrial time scales on intervals longer than a year. An ensemble pulsar time scale is constructed based on pulsar timing data obtained on the 64-m Parkes ...
Fedorova, Viktoriya, Rodin, Alexander
core   +1 more source

NICER Timing of the X-Ray Thermal Isolated Neutron Star RX J0806.4–4123

The Astrophysical Journal
The X-ray thermal isolated neutron star (XTINS) RX J0806.4–4123 shows interesting multiwavelength properties that seemingly deviate from those of similar neutron stars.
B. Posselt, G. G. Pavlov, W. C. G. Ho, F. Haberl   +3 more
doaj   +1 more source

Reprocessing of the Parkes 70 cm Survey and Discovery of a New Radio Pulsar in the Large Magellanic Cloud

The Astrophysical Journal
We have reprocessed the data archived from the Parkes 70 cm (PKS70) pulsar survey with an expanded dispersion measure (DM) search range and an acceleration search.
Wenke Xia, Fronefield Crawford, Shinnosuke Hisano, Tai Jespersen, Melanie Ficarra, Mckenzie Golden, Mia Gironda   +6 more
doaj   +1 more source

Multi-Method Timing of Transient Radio Pulsars with the GBT350 and GBNCC Surveys

We present the timing solutions for three radio pulsars discovered with the Green Bank North Celestial Cap (GBNCC) and 350-MHz Green Bank Telescope drift-scan surveys. These pulsars were initially discovered through their single-pulse emission and therefore designated as rotating radio transients (RRATs).
Lewis, E. F., McLaughlin, M. A., Swiggum, J. K., Blumer, H., Boyles, J., Chawla, P., Dolch, T., Hessels, J. W. T., Kaplan, D. L., Karako-Argaman, C., Kaspi, V., Kondratiev, V., Levin, L., Lynch, R. S., Martinez, J. G., McEwen, A. E., Miller, R., Parent, E., Ransom, S. M., Roberts, M. S. E., Rowe, A., Spiewak, R., Stairs, I. H., Stovall, K., Thorley, J., van Leeuwen, J.   +25 more
openaire   +2 more sources

The NANOGrav 12.5-Year Data Set: Dispersion Measure Misestimations with Varying Bandwidths

The Astrophysical Journal
Noise characterization for pulsar-timing applications accounts for interstellar dispersion by assuming a known frequency dependence of the delay it introduces in the times of arrival (TOAs).
Sophia Valentina Sosa Fiscella, Michael T. Lam, Zaven Arzoumanian, Harsha Blumer, Paul R. Brook, H. Thankful Cromartie, Megan E. DeCesar, Paul B. Demorest, Timothy Dolch, Justin A. Ellis, Robert D. Ferdman, Elizabeth C. Ferrara, Emmanuel Fonseca, Nate Garver-Daniels, Peter A. Gentile, Deborah C. Good, Megan L. Jones, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, Maura A. McLaughlin, Cherry Ng, David J. Nice, Timothy T. Pennucci, Nihan S. Pol, Scott M. Ransom, Renée Spiewak, Ingrid H. Stairs, Kevin Stovall, Joseph K. Swiggum, Sarah J. Vigeland   +30 more
doaj   +1 more source

Identifying Pulsar Candidates in Interferometric Radio Images Using Scintillation

The Astrophysical Journal
Pulsars have been primarily detected by their narrow pulses or periodicity in time domain data. Interferometric surveys for pulsars are challenging due to the trade-off between beam sensitivity and beam size and the corresponding tradeoff between survey ...
Jitendra Salal, Shriharsh P. Tendulkar, Visweshwar Ram Marthi   +2 more
doaj   +1 more source

A 34 yr Timing Solution of the Redback Millisecond Pulsar Terzan 5A

The Astrophysical Journal
We present a 34 yr timing solution of the redback pulsar system Terzan 5A (Ter5A). Ter5A, also known as B1744−24A or J1748−2446A, has a 11.56 ms pulse period, a ~0.1 M _⊙ dwarf companion star, and an orbital period of 1.82 hr.
Alexandra C. Rosenthal, Scott M. Ransom, Kyle A. Corcoran, Megan E. DeCesar, Paulo C. C. Freire, Jason W. T. Hessels, Michael J. Keith, Ryan S. Lynch, Andrew Lyne, David J. Nice, Ingrid H. Stairs, Ben Stappers, Jay Strader, Stephen E. Thorsett, Ryan Urquhart   +14 more
doaj   +1 more source

Bounding the Photon Mass with Ultrawide Bandwidth Pulsar Timing Data and Dedispersed Pulses of Fast Radio Bursts

The Astrophysical Journal
Exploring the concept of a massive photon has been an important area in astronomy and physics. If photons have mass, their propagation in nonvacuum space would be affected by both the nonzero mass m _γ and the presence of a plasma medium. This would lead
Yu-Bin Wang, Xia Zhou, Abdusattar Kurban, Fa-Yin Wang   +3 more
doaj   +1 more source

The GMRT High-resolution Southern Sky Survey for Pulsars and Transients. VII. Timing of the Spider Millisecond Pulsar PSR J1242–4712, a Bridge between Redback and Black Widow Pulsars

The Astrophysical Journal
We present a timing solution for the 5.31 ms spider millisecond pulsar (MSP) J1242−4712, discovered with the GMRT. PSR J1242−4712 orbits a companion of minimum mass 0.08 M _⊙ with an orbital period of 7.7 hr and occupies a relatively unexplored region in
Ankita Ghosh, Bhaswati Bhattacharyya, Andrew Lyne, David L. Kaplan, Jayanta Roy, Paul S. Ray, Ben Stappers, Sangita Kumari, Shubham Singh, Rahul Sharan   +9 more
doaj   +1 more source