Archive Search Parameters
Parameter Example Default Comments
Source Information
Observer Name Rood All  
Source Name W3 All Note 1
Coordinates 15.0 deg -3.0 deg All Note 2
Coordinate Mode Galactic J2000 B1950; J2000; Galactic; Ecliptic (listbox)
Search Radius 10.0 deg All If zero use the primary beam size.
Elevation Range 25 to 90 deg All Specify a range.
Observing Information
Observing Frequency 9000 to 10000 MHz All Specify a range. Note 3
Frequency Type Sky Sky Sky; Rest (listbox)
Source Velocity 100 km/s All This can be a redshift.
Velocity Type LSR-Radio Redshift LSR-Radio; Barycenter-Optical; Redshift (listbox)
Bandwidth 12 to 60 MHz All Specify a range.
Frequency Resolution 0 to 1000 KHz All Specify a range.
Polarization RR All Note 4
Exposure Time 1 to 5 hr All Specify a range.
Telescope Specific Information
Receiver (Front End) Rcvr8_10 All (listbox) Note 5
Detector (Back End) Spectrometer All (listbox) Note 6
Project Information
Project ID AGBT02A_041* All Wildcards available.
Time Range 2006-05-01 to 2007-01-01 All  

GBT Metadata
Parameter Example Range Comments
Source Information
Analysis Notes     Note 10
Source Name W3    
J2000 Position 02:25:44.40 +62:06:11 0 - 24 hr -50 - +90 deg  
Elevation 25.4 deg 5 - 95 deg  
Observing Information
Center Frequency 8300.0 MHz 20 - 150000 MHz  
Bandwidth 50 MHz   Note 7
Frequency Resolution 10 KHz   Note 8
Polarization RR   Note 4
Exposure Time 2.3 hr 0 - 18 hr  
Telescope Specific Information
Receiver (Front End) Rcvr8_10   Note 5
Detector (Back End) Spectrometer   Note 6
Project Information
Project ID AGBT02A_041_01    
Start Time 2004_06_21_23:46:13 2000-2050 yr  
Observer Name Rood    
Future Parameters
System Temperature 30 K 0 - 1000 K Note 9

Notes
Reference Note
Note 1 There should be an on/off switch to either resolve the source position or not. That is, to use the source name and a catalog to get the coordinates associated with this source name. Also, there should be an option to return calibrators associated with this search. Wildcards should be permitted when not resolving the source name (e.g., W3* should find W3, W3OH, etc.).
Note 2 The meta-data will consist of only J2000 positions. So if the coordinate mode is different than J2000 the interface will convert to J2000. Different coordinate formats should be allowed such as colons and spaces.
Note 3 The sky frequency is the actual frequency that was observed at the time of the observations. Therefore, the meta-data will consist of the sky frequencies. Because of the Doppler effect the frequency of a given spectral line, for example, can be significantly shifted due to large relative source motions. If sky frequency then just use the input observing frequency directly. If rest frequency then use the source velocity, velocity type, source position, and date/time to calculate a sky frequency from the observing frequency listed.
Note 4 The following polarizations are possible: XX, YY, XY, YX, LL, RR, LR, RL.
Note 5 The current list of possible receiver names: RcvrPF_1, RcvrPF_2, Rcvr1_2, Rcvr2_3, Rcvr4_6, Rcvr8_10, Rcvr12_18, Rcvr18_26, Rcvr26_40, Rcvr40_52, Rcvr_PAR (called PennArrayReceiver inside FITS file).
Note 6 The current list of possible detector names: DCR, Spectrometer, SpectralProcessor, CCB26_40, Zpectrometer, Holography, Rcvr_PAR (called PennArrayReceiver inside FITS file). The Rcvr_PAR is both a receiver and detector in one package.
Note 7 The range of values for bandwidth depend on the receivers and detectors in some cases.
Note 8 The range of values for frequency resolution depend on the receivers and detectors in some cases.
Note 9 The system temperature has to be calculated using the data.
Note 10 Analysis notes are text input from eitherobserver/operator logs for raw data, notes generated by a pipeline for processed data, or notes from an investigator that has published data in our archive.

-- DanaBalser - 22 Jun 2007
Topic revision: r4 - 2007-07-26, DanaBalser
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