Skip to main content Accessibility help
×
Home

A new era for low frequency Galactic center transient monitoring

Published online by Cambridge University Press:  22 May 2014


N. E. Kassim
Affiliation:
Naval Research Laboratory, Washington, DC, United States email: namir.kassim@nrl.navy.mil
S. D. Hyman
Affiliation:
Dept. of Physics, Sweet Briar College, Sweet Briar, Virginia email: sdhyman@sbc.edu
H. Intema
Affiliation:
National Radio Astronomy Observatory, Socorro, New Mexico email: hintema@nrao.edu
T. J. W. Lazio
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology Pasadena, California email: joseph.lazio@jpl.nasa.gov

Abstract

An upgrade of the low frequency observing system of the VLA developed by NRL and NRAO, called low band (LB), will open a new era of Galactic center (GC) transient monitoring. Our previous searches using the VLA and GMRT have revealed a modest number of radio-selected transients, but have been severely sensitivity and observing time limited. The new LB system, currently accessing the 236--492 MHz frequency range, promises ≥5 × improved sensitivity over the legacy VLA system. The new system is emerging from commissioning in time to catch any enhanced sub-GHz emission from the G2 cloud event, and we review existing limits based on recent observations. We also describe a proposed 24/7 commensal system, called the LOw Band Observatory (LOBO). LOBO offers over 100 VLA GC monitoring hours per year, possibly revealing new transients and helping validate ASTRO2010's anticipation of a new era of transient radio astronomy. A funded LOBO pathfinder called the VLA Low Frequency Ionosphere and Transient Experiment (VLITE) is under development. Finally, we consider the impact of LB and LOBO on our GC monitoring program.


Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2014 

References

Clarke, T. E., Kassim, N. E., Hicks, B. C., Owen, F. N., Durand, S., Kutz, C., Pospieszalski, M., Perley, R. A., Weiler, K. W., & Wilson, T. L. 2011, MmSAI 82, 664Google Scholar
Gillessen, S., Genzel, R., Fritz, T. K., et al. 2012, Nature 481, 51CrossRefGoogle Scholar
Hyman, S. D., Wijnands, R., Lazio, T. J. W., Pal, S., Starling, R., Kassim, N. E., & Ray, P. S. 2009, ApJ 696, 280CrossRefGoogle Scholar
Kassim, N. E., Hyman, S. D., Intema, H., Clarke, T. E., & Subrahmanyan, R. 2013, ATEL 4922Google Scholar
Narayan, R., Özel, F., & Sironi, L. 2012, ApJ Lett. 757, L20CrossRefGoogle Scholar
Roy, N. & Kanekar, N. 2013, ATEL 5323Google Scholar

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 63 *
View data table for this chart

* Views captured on Cambridge Core between September 2016 - 3rd December 2020. This data will be updated every 24 hours.

Access
Hostname: page-component-b4dcdd7-z76xg Total loading time: 0.397 Render date: 2020-12-03T17:23:55.350Z Query parameters: { "hasAccess": "1", "openAccess": "0", "isLogged": "0", "lang": "en" } Feature Flags last update: Thu Dec 03 2020 16:59:02 GMT+0000 (Coordinated Universal Time) Feature Flags: { "metrics": true, "metricsAbstractViews": false, "peerReview": true, "crossMark": true, "comments": true, "relatedCommentaries": true, "subject": true, "clr": false, "languageSwitch": true }

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

A new era for low frequency Galactic center transient monitoring
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

A new era for low frequency Galactic center transient monitoring
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

A new era for low frequency Galactic center transient monitoring
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *