(Re)discover new pulsars

With recent discoveries of pulsars in ULX and other extragalactic pulsars, it is interesting to reproduce these results right on this website.

NGC 5907 ULX — super-Eddington neutron star

Science paper

Period 1.13 s, maximum X-ray luminosity 1e41 erg/s

  1. Do query: cone('NGC 5907', '4 arcmin') AND is_ulx = True to search for ULXs in NGC 5907 and choose the brightest source (with SC_EP_8_FLUX = 1.3e-12) in the results
  2. On the source page choose its detection from e.g. Jul 2014 (direct link to the detection page)
  3. Click on the "Detection image and event list tools" link at the top to go to the region extraction page
  4. Adjust region to your liking and click Get data → Extract photons. Wait couple of minutes until photons are extracted and power density spectrum plot is generated.
  5. Voilà: you should see pulsations at 0.879 Hz

NGC 7793 P13 — super-Eddington neutron star

MNRAS paper

Period 0.42 s, maximum X-ray luminosity 5e39 erg/s

  1. Do query: cone('NGC 7793', '4 arcmin') and choose the brightest source (with SC_EP_8_FLUX = 9e-14) in the results
  2. On the source page choose its detection from e.g. Jul 2014 (direct link to the detection page)
  3. Click on the "Detection image and event list tools" link at the top to go to the region extraction page
  4. Adjust region to your liking and click Get data → Extract photons. Wait couple of minutes until photons are extracted and power density spectrum plot is generated.
  5. Voilà: you should see pulsations at 2.39 Hz

M31 XB091D — the slowest spinning X-ray pulsar in a globular cluster

ApJ paper, MNRAS paper

Period 1.2 s, maximum X-ray luminosity 1e38 erg/s

  1. Do query: Bol D91 to search for pulsar's host globular cluster in M31 galaxy and choose the brightest source (with 30+ observations) in the results
  2. On the source page choose e.g. its 60 ksec observation made on 2002-01-06 (direct link to the detection page)
  3. Click on the "Detection image and event list tools" link at the top to go to the region extraction page
  4. Adjust region to your liking and click Get data → Extract photons. Wait couple of minutes until photons are extracted and power density spectrum plot is generated.
  5. Voilà: you should see pulsations at 0.831 Hz