SIMPLE = T / file does conform to FITS standard BITPIX = 8 / number of bits per pixel NAXIS = 0 / number of data axes EXTEND = T / FITS dataset may contain extensions ORIGIN = 'NRAO Green Bank' / INSTRUME= 'Berkeley Caltech Pulsar Machine' / device or program of origin GBTMCVER= '3.3.0' / telescope control software release FITSVER = '1.1' / FITS definition version for this device DATEBLD= 'Thu Jun 7 20:15:13 GMT 2001' / time program was linked SIMULATE= 0 / Is the instrument in simulate mode? DATE-OBS= '2000-10-25T13:57:17' / Manager parameter startTime TIMESYS = 'UTC' / time scale specification for DATE-OBS TELESCOP= 'NRAO_GBT' / Green Bank Telescope (Robert C. Byrd 100m) OBJECT = '0013+1527' / Manager parameter source PROJID = 'RMP_DCR' / Manager parameter projectId OBSID = 'test' / Manager parameter scanId SCAN = 3 / Manager parameter scanNumber MANAGER = 'BCPM1 ' / GBT Device Manager CALFLAG = 0 / Flag whether cal signal was used MODE = 'monitor ' / BCPM operating mode SUMPOL = 0 / Flag whether polarizations are summed BANDWDTH= 1.740000E+06 / SSB channel bandwidth in Hz SAMPTIME= '4x ' / Sample time ELAPTIME= 1.5E+01 / elapsed time of the observation END
There are four non-standard GBT keywords. A value of 0 for the CALFLAG keyword indicates that a calibration signal was not present for the observation; a value of 1 indicates the presence of a calibration signal. The MODE keyword indicates the operating mode of the BCPM; this keyword is always set to ``monitor'' while the BCPM is in monitoring mode. The SUMPOL keyword is set to a value of 1 when polarization summing is in effect during an observation and it is 0 otherwise. The data sample time is expressed in terms of decimation factors in the SAMPTIME keyword; possible values for this keyword are ``1x'', ``2x'', ``4x'', and ``8x.''
SIMPLE = T / file does conform to FITS standard BITPIX = 8 / number of bits per data pixel NAXIS = 0 / number of data axes EXTEND = T / FITS dataset may contain extensions ORIGIN = 'NRAO Green Bank' / INSTRUME= 'Berkeley Caltech Pulsar Machine' / device or program of origin GBTMCVER= '3.3.0' / telescope control software release FITSVER = '1.1' / FITS definition version for this device DATEBLD= 'Thu Jun 7 20:15:13 GMT 2001' / time program was linked SIMULATE= F / Is the instrument in simulate mode? DATE-OBS= '2000-10-25T13:57:17' / Manager parameter startTime TIMESYS = 'UTC' / time scale specification for DATE-OBS TELESCOP= 'NRAO_GBT' / Green Bank Telescope (Robert C. Byrd 100m) OBJECT = '0013+1527' / Manager parameter source PROJID = 'RMP_DCR' / Manager parameter projectId OBSID = 'test' / Manager parameter scanId SCAN = 3 / Manager parameter scanNumber MANAGER = 'BCPM1 ' / GBT Device Manager CALFLAG = 0 / Flag whether cal signal was used MODE = 'search ' / BCPM operating mode SUMPOL = 0 / Flag whether polarizations are summed BANDWDTH= 1.740000E+06 / SSB channel bandwidth in Hz SAMPTIME= '4x ' / Sample time RA = '00:00:00.0' / R. A. of the observation DEC = '00:00:00.0' / declination of the observed object ELAPTIME= 1.5E+01 / elapsed time of the observation STORAGE = 'Tape ' / The data storage device FILESIZE= 100 / The size of the data file TARGET = '0013+1527' / Keyword in BCPM data file header BASENAME= '0013+1527' / Basis for the data filename END
There are eight non-standard GBT keywords. A value of 0 for the CALFLAG keyword indicates that a calibration signal was not present for the observation; a value of 1 indicates the presence of a calibration signal. The MODE keyword indicates the operating mode of the BCPM; this keyword is always set to ``search'' while the BCPM is in search mode. The SUMPOL keyword is set to a value of 1 when polarization summing is in effect during an observation and it is 0 otherwise. The data sample time is expressed in terms of decimation factors in the SAMPTIME keyword; possible values for this keyword are ``1x'', ``2x'', ``4x'', and ``8x.'' The STORAGE keyword indicates whether the observation data are saved to ``Disk'', which refers to the workstation's hard drive, or to ``Tape'', which refers to either DLT tape or a networked directory. If STORAGE is ``Tape'', the BCPM software will partition the data into multiple files rather than one large file. The partition size is specified via the FILESIZE keyword, which only appears if STORAGE is ``Tape'', and is in units of seconds. TARGET is a keyword that represents a string that identifies the observation, which is in the BCPM data file. The BASENAME is a string that forms part of the data file name. Both TARGET and BASENAME are user specified at the time of the observation.
SIMPLE = T / file does conform to FITS standard BITPIX = 8 / number of bits per data pixel NAXIS = 0 / number of data axes EXTEND = T / FITS dataset may contain extensions ORIGIN = 'NRAO Green Bank' / INSTRUME= 'Berkeley Caltech Pulsar Machine' / device or program of origin GBTMCVER= '3.3.0' / telescope control software release FITSVER = '1.1' / FITS definition version for this device DATEBLD= 'Thu Jun 7 20:15:13 GMT 2001' / time program was linked SIMULATE= F / Is the instrument in simulate mode? DATE-OBS= '2000-10-25T13:57:17' / Manager parameter startTime TIMESYS = 'UTC' / time scale specification for DATE-OBS TELESCOP= 'NRAO_GBT' / Green Bank Telescope (Robert C. Byrd 100m) OBJECT = '0013+1527' / Manager parameter source PROJID = 'RMP_DCR' / Manager parameter projectId OBSID = 'test' / Manager parameter scanId SCAN = 3 / Manager parameter scanNumber MANAGER = 'BCPM1 ' / GBT Device Manager CALFLAG = 0 / Flag whether cal signal was used MODE = 'timing ' / BCPM operating mode PERIOD = 1.0E-03 / Period of the pulsar in seconds PHASEBIN= 128 / The number of phase bins (power of 2) DM = 3E-02 / Dispersion measure (parsecs per cm^3) CENTFREQ= 1.4E+09 / Sky frequency for center of the band in Hz BANDWDTH= 1.740000E+06 / SSB channel bandwidth in Hz SUMPOL = 0 / Flag whether polarizations are summed ELAPTIME= 1.5E+01 / elapsed time of the observation STORAGE = 'Disk ' / The data storage device END
There are eight non-standard GBT keywords. A value of 0 for the CALFLAG keyword indicates that a calibration signal was not present for the observation; a value of 1 indicates the presence of a calibration signal. The MODE keyword indicates the operating mode of the BCPM; this keyword is always set to ``timing'' while the BCPM is in timing mode. The PERIOD keyword indicates the period of the pulsar to be timed; if the pulsar already has an entry in the polyco.dat file, this keyword is omitted. The PHASEBIN keyword indicates the number of phase bins used for the observation. The number of phase bins is a power of two and must be between 1 and 8192. If the pulsar under observation already has an entry in the polyco.dat file, the PHASEBIN keyword is omitted. The DM keyword indicates the dispersion measure of the pulsar under observation; dispersion measure is related in units of parsecs per cubic centimeter. If the pulsar under observation already has an entry in the polyco.dat file, the DM keyword is omitted. The CENTFREQ keyword indicates the sky center frequency of the observation in Hertz. The SUMPOL keyword is set to a value of 1 when polarization summing is in effect during an observation and it is 0 otherwise. The STORAGE keyword is always set to ``Disk'' in timing mode, indicating that the data files are saved to the hard drive of the BCPM computer.
SIMPLE = T / file does conform to FITS standard BITPIX = 8 / number of bits per data pixel NAXIS = 0 / number of data axes EXTEND = T / FITS dataset may contain extensions ORIGIN = 'NRAO Green Bank' / INSTRUME= 'Berkeley Caltech Pulsar Machine' / device or program of origin GBTMCVER= '3.3.0' / telescope control software release FITSVER = '1.1' / FITS definition version for this device DATEBLD= 'Thu Jun 7 20:15:13 GMT 2001' / time program was linked SIMULATE= F / Is the instrument in simulate mode? DATE-OBS= '2000-10-25T13:57:17' / Manager parameter startTime TIMESYS = 'UTC' / time scale specification for DATE-OBS TELESCOP= 'NRAO_GBT' / Green Bank Telescope (Robert C. Byrd 100m) OBJECT = '0013+1527' / Manager parameter source PROJID = 'RMP_DCR' / Manager parameter projectId OBSID = 'test' / Manager parameter scanId SCAN = 3 / Manager parameter scanNumber MANAGER = 'BCPM1 ' / GBT Device Manager CALFLAG = 0 / Flag whether cal signal was used MODE = 'voltage sampling' / BCPM operating mode BANDWDTH= 1.740000E+06 / DSB channel bandwidth in Hz SAMPTIME= '4x ' / Sample time REGISTER= 'POLA0 ' / Register from which the voltage is sampled RA = '00:00:00.0' / R. A. of the observation DEC = '00:00:00.0' / declination of the observed object ELAPTIME= 1.5E+01 / elapsed time of the observation STORAGE = 'Tape ' / The data storage device FILESIZE= 100 / The size of the data file TARGET = '0013+1527' / Keyword in BCPM data file header BASENAME= '0013+1527' / Basis for the data filename END
There are eight non-standard GBT keywords. A value of 0 for the CALFLAG keyword indicates that a calibration signal was not present for the observation; a value of 1 indicates the presence of a calibration signal. The MODE keyword indicates the operating mode of the BCPM; this keyword is always set to ``voltage sampling'' while the BCPM is in voltage sampling mode. The data sample time is expressed in terms of decimation factors in the SAMPTIME keyword; possible values for this keyword are ``1x'', ``2x'', ``4x'', and ``8x.'' The REGISTER keyword indicates the register name from which the voltage is being sampled. Possible values for REGISTER are ``POLA0'', ``POLA1'', ``POLA2'', ``POLA3'', ``POLB4'', ``POLB5'', ``POLB6'', and ``POLB7''. The STORAGE keyword indicates whether the observation data are saved to ``Disk'', which refers to the workstation's hard drive, or to ``Tape'', which refers to either DLT tape or a networked directory. If STORAGE is ``Tape'', the BCPM software will partition the data into multiple files rather than one large file. The partition size is specified via the FILESIZE keyword, which only appears if STORAGE is ``Tape'', and is in units of seconds. TARGET is a keyword that represents a string that identifies the observation, which is in the BCPM data file. The BASENAME is a string that forms part of the data file name. Both TARGET and BASENAME are user specified at the time of the observation.