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BB248 |
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The Megamaser Cosmology Project: A Target of Opportunity in Mrk 1419 |
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Abstract |
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| The H 2 O maser in Mrk 1419 may become one of the cornerstone sources for the Megamaser Cosmology Project (MCP). It has a similar spectrum to NGC 4258 and is located well into the Hubble Flow, so a maser distance directly yields an estimate of H 0 . We have just detected a 200 mJy flare in this source, which would allow us to self-calibrate on the maser using the GBT and VLBA antennas. Self-calibration is highly preferable to external phase-referencing. As discussed in this ToO request, one observing track now could produce data with the sensitivity of nearly 10 tracks, once the flare fades. Therefore, we request a 10 hour ToO observation of Mrk 1419 with the VLBA and GBT. | |||||||||||||||||||||||||||||||||||||||
| Investigators | |||||||||||||||||||||||||||||||||||||||
| Name | Other * | Institution | Phone | |
| Jim Braatz | PI | NRAO - CV | jbraatz@nrao.edu | work: 434-296-0251 home: 434 973-4453 |
| Lincoln Greenhill | CfA | greenhill@cfa.harvard.edu | 617 495-7194 | |
| Mark Reid | Center for Astrophysics | reid@cfa.harvard.edu | 617 495-7470 | |
| Jim Condon | NRAO-CV | jcondon@nrao.edu | (434) 296-0322 | |
| Chris Henkel | Max-Planck-Institut fur Radioa | p220hen@mpifr-bonn.mpg.de | 49-228-525-305 | |
| Fred Lo | NRAO-CV | flo@nrao.edu | 434-296-0221 | |
| * PI = Principal Investigator; CO = Contact author; T = Thesis observations; S = Student | ||||
| Front Ends | ||||
| Gregorian K(18.0 to 26.5 GHz) | ||||
| Back Ends | ||||
| Mark 5 recorder (disks) | ||||
| Type of Observing | ||||
| Very Long Baseline Interferometry | ||||
| Switching Type | ||||
| Processor (correlator) | ||||
| Notapplicable | ||||
| Allotted time 12.00 hours |
| NRAO Home | Contact | Directories |
| Updated 09/19/2007 |