HIP 74995

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Gliese 581

M2.5V red dwarf 20.4 LY away

Other Names

  • HO Librae
  • HIP 74995
  • GI 581

Data

  • RA 15 19 26.00
  • Dec -07 43 20.00

    The star Gliese 581 (aka HIP 74995) has a planet orbiting it.  The planet has been named Gliese 581c.

    "the most Earth-like planet yet outside our solar system, with balmy temperatures that could support water and, potentially, life."

    Comes into view at about 10 PM local time..

     

    “Sunset from the Surface of Gliese 581c” by Karen Wehrstein

    Peter Cheasley converted one of the WAV files into a MIDI file using commercial software.   Click on it to hear Music from Gliese

2007-06-13    HellIfIKnow signal

1381,257,722 Hz

During the night (1 AM) this series of carriers came on and tripped the alarm.  As you can see the carriers are spread across the entire band.  I have no idea how far they extend up and down band.

2007-06-12

1449,992,912 Hz

Notes:

  1. This signal was one of many near this frequency  It had Doppler enough to trip the alarm at 16 K spectrum size but not at 32 K (1.43 Hz/bin)
  2. I move the antenna around and the signal did not change much.  It is coming from a local signal of some sort.

2007-05-29T00-21-32.WAV 25 meg WAV file

1422,985,000 Hz

Same freq. but at highest resolution

  1. Notes:
  2. This signal seems to be moving down band faster than my calculated Doppler.
  3. It does appear to be located in the sky, rather than a local signal
  4. It seems stable and narrow based on my highest resolution
  5. In high resolution JPG (32K above) the left side shows the effect of Bin shifting
  6. This High Res image is 1.345 Hz/Bin and required about 15 minutes to create
  7. Signal drifted down about 30 bins in this period.

2007-05-11

1426,565,000 Hz

2007-05-11T01-39-02.WAV

Notes:

  1. Generated Auto Alarm and email at 1:25 AM
  2. This signal was not found about at 9 AM the next morning
  3. Will require further investigation tonight.
  4. Retesting tonight (2007-05-11).  So far no signal.
  5. Signal found again at 7:30 AM Pacific. 
  6. ET Hit falsified.

 

1423,874,900 Hz (3 Meg JPG)

2007-04-29T23-05-34.WAV (5 Meg)

2007-04-29T23-06-35.WAV (5 Meg)

2007-04-29T23-07-36.WAV (5 Meg)

Notes:

  1. Strong signal
  2. If you click on the JPG (above) it will take a while to download, its 3 Meg, and it will create a very wide picture of the signal.
  3. WAVs were being collected at 1 min intervals so they are small but continuous
  4. Appears to be in the sky rather than a local signal.  Verified by moving the antenna from side to side and up and down.
  5. JPG, collected at 1.34 HZ/Bin, shows little Doppler but what appears to be modulation.  It seems to be FSKed at about 8 bins or about 10 Hz
  6. This signal is worth a second look in the morning.

 

1423,760,000 Hz  Very difficult to see in the JPG

2007-04-28T22-05-10.WAV 44 Meg WAV file with the signal in it

Notes:

  1. This signal was detected at 20% above the surrounding bin column averages at 10.7 Hz/bin
  2. Using large integration constant (10 minutes)
  3. It is far to the right side of the JPG and difficult to see
  4. I moved the Spectrum Analyzer up to its highest setting (32K size - 1.34 Hz/Bin) and the software  became unstable.  I did see the line in one JPG.
  5. When at this higher spectrum size (and smaller bin size) the signal did NOT trip the 20% average criteria
  6. It appeared as though it was moving up slowly because I had bin chirp running.
  7. I don't think this is a hit but worth a re-look tomorrow.
  8. The next day I was able to acquire this signal in a different part of the sky so it's defiantly *Busted*

1423,100,000 Hz

2007-04-25T22-07-49.WAV Very small WAV (355 KB)

Notes:

  1. This signal did show Doppler.  The receiver chirp was running and this signal is a straight line
  2. Moving the antenna back and forth did not change the amplitude of this signal
  3. Hit invalidated.

 

 

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