MBCAA Observatory

SS433 spectra

Updated 22 Oct 2006, 26 Jan 2007


Session 17 June 2006

According to the Eikenberry et al (2001) ephemeris, the redshift is 0.184 and the blueshift is -0.110:


The blue line is the blueshifted Halpha line, the red one is the redshifted one. The dot line is the time of my observation.


14x200s exposure, Jeulin grating.

  • The Halpha 6563 line is prominent in all the spectra;
  • The line at 4640 may be the HeII 4686;
  • There may be the HeI 5876 line or the blueshifted Halpha line at 5840;
  • The line at 5660 is not identified.


    • Session 23 June 2006

    According to the ephemeris, the redshift is 0.177 and the blueshift is -0.103:


    2x60s + 20x200s exposure.

  • The 5820 line may be the HeI 5876 line or the blueshifted Halpha line at 5884;
  • The 7040 line may be the HeI 7065 line;
  • The lines are 4920, 5250, 5690, 7500 are not identified.


    • Session 29 June 2006

    According to the ephemeris, the redshift is 0.166 and the blueshift -0.092:


    27x200s exposure.

  • The line at 5830 may be the HeI 5876 line;
  • The line at 4600 may be the HeII 4686 line;
  • The line at 7050 may be the HeI 7065 line;
  • The lines at 5680 and 6210 are not identified.


    • Session 23 July 2006

    According to the ephemeris, the redshift is 0.089 and the blueshift is -0.015:


    12x200s exposure.

  • The strong line at 5820 is probably the HeI 5876 line.
  • The line at 7080 may be the redshited Halpha line (should be at 7146 according to the ephemeris) or more likely is the HeI 7065 line.
  • The line at 6900 is not identified.
  • The absorption at 7600 is interpreted as telluric oxygen.


    • Session 29 July 2006

    According to the ephemeris, the redshift is 0.067 and the "blueshift" 0.007 (a redshift actually):


    9x200s exposure. The data around 7400 are missing because of hot pixels.

  • Lines are observed at 6780, 5640, 5200, 7500 but are not interpreted;
  • The weak line at 4500 may be HeI 4471;
  • There is a recurrent (shows up on other spectra) weak line 5350, not interpreted;
  • There is an absorption line at 8200, not interpreted;
  • The telluric oxygen absorption line at 7600 is visible.

    Session 22 Aug 2006

    According to the ephemeris, the redshift is 0.002 and the "blueshift" is 0.072 (a redshift actually):


    9x200s exposure. There is not data for <4500 and >8000 because of hot pixels.

  • The strong line at 7050 may be the redshifted Halpha (should be at 7037 according to the ephemeris) or more likely the HeI 7065;
  • The line at 4600 may be the HeII 4686;
  • The lines at 6770, 5670, 5850 are not interpreted;
  • The line at 5300 may be recurrent and is not interpreted.


    • Session 30 Aug 2006

    According to the ephemeris, the "redshift" is -0.005 (a blueshift actually) and the "blueshift" is 0.079 (a redshift actually):


    10x200s exposure, StarAnalyzer grating at 49.3 mm from the CCD (resolution: 18A/pixel).

  • The feature at 7200 is due to a star that overlaps the spectrum. It did not show up in the previous spectra because the camera/grating orientation was different. There may be a line around 7000, actually the redshited Halpha line should be at 7084 according to the ephemeris, or it may be the HeI 7065 line;
  • The line at 4500 may be HeI 4471;
  • There is a line at 6420, not interpreted;
  • There are those recurrent lines at 5300 and 8180, not interpreted;
  • The telluric oxygen absorption at 7600 is visible.


    • Session 20 Sep 2006

    According to the ephemeris, the redshift is 0.018 and the "blueshift" is 0.056 (a redshift actually):


    18x200s exposure.

  • The strong line at 6730 may be interpreted as the HeI 6678 line;
  • The reccurent line at 4500 may be the HeI 4471 line;
  • There is again these lines at 5300 and 8200, not interpreted;
  • There are weak lines at 3900 and 5540, not interpreted;
  • The small absorption at 7600 is interpreted as telluric oxygen;
  • The bump around 7200 is due to a star that overlaps with the spectrum.


    • Session 15 Oct 2006

    According to the ephemeris the redshift is 0.101 and the blueshift is -0.027:


    18x200s exposure.

  • The strong line at 6230 may be the blueshited Halpha (should be 6384 according to the ephemeris);
  • The strong line at 4470 may be the "redshifted" Hbeta (4524 according to the ephemeris) line or the HeI 4471 line;
  • There is this reccurent line at 5300, not interpreted;
  • The small absorption at 7600 is interpreted as telluric oxygen;
  • The bump around 7300 is due to a star that overlaps with the spectrum.


    • Session 14 Nov 2006

    According to the ephemeris the redshift is 0.182 (Halpha: 7756) and the blueshift is -0.108 (Halpha: 5855):


    The StarAnalyzer is at 62.8mm from the CCD (resolution: 14A/pixel). 8x200s exposure. There are 3 gaps because of overlaping stars.

  • The line at 4500 may be HeI 4471;
  • The line at 5200 is not interpreted;
  • The line at 5930 may be the HeI 5876 line or the blue shifted Halpha at 5855.


    • Session 18 Nov 2006

    According to the ephemeris the redshift is 0.185 (Halpha: 7777) and the blueshift is -0.111 (Halpha: 5834):


    11x200s exposure. There are 2 gaps because of overlapping stars.

  • The line at 4500 may be HeI 4471;
  • The line at 5834 may be HeI 5876 or the blueshifted Halpha;
  • The line at 7777 may be the redshifted Halpha.


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