KFPA Test TKFPA_30: 2010 September 6

The final observing session for KFPA recommissioning had a number of observing goals:
  • Check the intra-beam calibration by observations of the moon and planets
  • Perform a deep integration of water maser source 1194
  • Complete a set of W51 ammonia lines to allow full testing of the temperature determination using NH3
  • Tests of faster mapping speeds by not firing the cal during mapping.

Jupiter: Target/Off 12/13; Map 14; Target/Off 15/16

The astrid commanded point/focus on Jupiter was carried out using the DCR with 800 MHz without problem. The spectrometer and IF was configured for 800 MHz 4 beam spectral line observations, followed by a Daisy map.

Mapping results looked reasonable.

Uranus: Target/Off 17/18; Map 19,20; Target/Off 21/22

The astrid peak using Uranus was reasonable, although the planet was rather weak. The map consisted of two Daisy pattern. The planet map did not show much emission. Seems like there was some sort of configuration problem.

W51: Target/Off 33/34; Map 35:45; Target/Off 46/47

Good NH3 (5-5) transition map. The peak emission is offset from the center of the map, so that the Target observation shows little emission. The observation was configured for the 200 MHz, 4 beam mode, with center frequency 24480 MHz.

W51: Target/Off 48/49; Map 50:60; Target/Off 61/62

Good NH3 (6-6) transition map. Little emission in the map center, but significant peak is offset from center. Four Beam 200 MHz mode, with center frequency 25071 MHz.

NGC 1194: Case of the Missing Masers; Nod Scans 68:87,93:112

We observed NGC1194 in the KFPA 2 Beam, 2 spectral band, 200 MHz bandwidth mode for the first time. Initially we thought that the KFPA was miss-configured as the majority of the maser lines were not present. Previous observations by Jim Braatz had shown a spectrum rich in lines. However subsequent observations by Jim, below, showed that the lines had indeed disappeared, save for a single strong line.

_____ ngc1194-all.png _
KFPA observation of a 600 second spectrum of maser emission towards NGC1194
Time Series of NGC1194 GBT K-band (not KFPA) observations of NGC1194

TMC Mapping test with No Cal blinking: Target/Off 120/121; Map 122:135; Target/Off 136/137

The Target/Off observations were made with the cal blinking, but the map was made without firing the cal and the samples were taken twice as fast as normal. The spectra were recorded every 0.5 seconds instead of the usual 1.0 seconds

Orion Maps with proper DecLatMap configuration

Moon Daisy maps for beam gain comparison

TMC HC7N J=22-21 Line Map, Partially completed

TMC map of HC7N J=22-21 line in Galactic latitude, longitude orientation. Ran out of time before map was completed. Scans 228 to 233.

TMC map of HC7N line at 23815.878 MHz (J=22-21). Ran out of time before map was completed.

-- GlenLangston - 2010-09-30

Topic attachments
I Attachment Action Size Date Who Comment
n1194-compare.gifgif n1194-compare.gif manage 11 K 2010-09-21 - 16:41 GlenLangston Time Series of NGC1194 observations
ngc1194-all.pngpng ngc1194-all.png manage 21 K 2010-09-21 - 16:38 GlenLangston image of Spectrum of NGC1194
ngc1194-kfpa.fitsfits ngc1194-kfpa.fits manage 50 K 2010-09-21 - 16:39 GlenLangston GBTIDL spectrum in FITS format
ngcave.propro ngcave.pro manage 1 K 2010-09-21 - 16:40 GlenLangston IDL procedure to average all NGC1194 Nod Scans
tmcTkfpaHc7n.pngpng tmcTkfpaHc7n.png manage 83 K 2010-11-29 - 09:36 GlenLangston TMC map without toggling Cal (miss aligned from source center)
Topic revision: r4 - 2010-11-29, GlenLangston
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