Observing Proposal Received 09 September 1999


Project Number Time Requested
Host Time Granted


PART I

Filaments and Filament Channels

Jongchul Chae and Sara Martin

Project Description: We are interested in the time evolution of filaments and filament channels. Filaments are dynamic features, ceaselessly undergoing motions. Particularly interesting is to try to learn how the mass is transported into and out of filament magnetic fields. An additional challenge is to learn how filament mass motions change at the beginning of an eruptive event and how the barbs of filaments detach from their chromospheric/photospheric roots. To gain further insight, we need new time-lapse series of observations as filaments form, during their stable phase, and before and during their eruption. Examples are need of the formation of barbs and their association with cancelling magnetic fields. Concurrent magnetic field and H-alpha observations with the improved equipment at Big Bear and at Helio Research would allow us to improve upon older observations of filament mass motions and specifically to better observe the relation of the barb footpoints to the photospheric magnetic roots and how they change with time. At Big Bear we seek time lapse magnetograms and fixed wavlength movies near H-alpha. For finer velocity discrimination, these will be complemented by multi-wavelength series of H-alpha filtergrams around H-alpha using the tunable etalon at Helio Research. Our priority of observing targets at the scheduled dates will be (1) eruption of a filament if one can be anticipated, (2) formation of a filament in a new filament channel (3) observation of a stable filament.

Type of Scheduling Type of Request Amount of Time Requested
Firm Dates
 
Joint
 
4 Days per Month

Preferred Dates: 15 October - 10 November, and as early as can be scheduled
Dates you will be Unable to Observe:
Observing Requirements:
Conditions: Good Seeing
Time of Day: All Day


PART II

Instrumentation and Technical Requirements

Please Select Filters, Cameras, and Image Scale. Note: You Must Select the Bench(es) You Want by Clicking the Button Next to the Name of the Bench Before Filling Out the Boxes on the Form.

Bench Filter Camera Image Scale
10C VMG or DMG      
26E Zeiss H-alpha-Lyot   OSL/SMD 1M15*    


PART III

Technical Requirements

Details of the Observing Procedures: We will perform H alpha observationa in two different ways. 1. Using OSL camera in the conventional way: this is default 2. Using SMD camera with frame selection: This will be done under good seeing conditions or when observing fast evolutions

Will you Bring any Equipment?

Additional Equipment or Expendable Supplies:


PART IV

Observing Proposal

New Proposal: the same as Description of the Project in Part I


Principal Investigator:

Name: Jongchul Chae
Institution: Big Bear Solar Observatory
Department/Street:
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Will you travel to the observatory for the observations? Yes
Will you require lodging at the observatory? No
New observer? No  


Additional Investigator:

Name: Sara Martin
Institution: Helio Research
Department/Street:
City:
State:
Zip Code:
Country:
Telephone:
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Will you travel to the observatory for the observations? No
Will you require lodging at the observatory? No
New observer? No  


Additional Investigator:

Name:
Institution:
Department/Street:
City:
State:
Zip Code:
Country:
Telephone:
E-Mail:
Fax:

Will you travel to the observatory for the observations? No
Will you require lodging at the observatory? No
New observer? No  


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© BBSO/NJIT - Automatically generated: 09 September 1999