Primary measurements, Chris L. Peterson Cloudbait Observatory, Colorado互联网档案馆的存檔,存档日期2011-05-25., The coma size values plotted at the bottom of this page are primary measurements. They were obtained using conventional methods: individual short CCDs images were made in order to avoid saturation, and these were then calibrated with bias, flat, and dark frames and summed to increase the image dynamic range. Each stacked image (for the 5 nights of data) was astrometrically calibrated (using Pinpoint) for scale, and the intensity profile of the coma measured with a standard tool (in this case, the line profile tool in MaximDL). The resulting profiles were exported to Excel, normalized to the same gain, and the width measured against the noise floor. The best reference is the plotted data itself.
Gritsevich, M.; Nissinen, M.; Oksanen, A.; Suomela, J.; Silber, E. A. Evolution of the dust trail of comet 17P/Holmes. Monthly Notices of the Royal Astronomical Society. June 2022, 513 (2): 2201–2214. doi:10.1093/mnras/stac822. hdl:10995/117894.
Gritsevich, M.; Nissinen, M.; Oksanen, A.; Suomela, J.; Silber, E. A. Evolution of the dust trail of comet 17P/Holmes. Monthly Notices of the Royal Astronomical Society. June 2022, 513 (2): 2201–2214. doi:10.1093/mnras/stac822. hdl:10995/117894.
Gunn, Angela. "Flash News Flash!互联网档案馆的存檔,存档日期2007-06-25.," USA Today Tech Space, 24 October 2007. Retrieved 25 October 2007.
Primary measurements, Chris L. Peterson Cloudbait Observatory, Colorado互联网档案馆的存檔,存档日期2011-05-25., The coma size values plotted at the bottom of this page are primary measurements. They were obtained using conventional methods: individual short CCDs images were made in order to avoid saturation, and these were then calibrated with bias, flat, and dark frames and summed to increase the image dynamic range. Each stacked image (for the 5 nights of data) was astrometrically calibrated (using Pinpoint) for scale, and the intensity profile of the coma measured with a standard tool (in this case, the line profile tool in MaximDL). The resulting profiles were exported to Excel, normalized to the same gain, and the width measured against the noise floor. The best reference is the plotted data itself.