Figure 4 from A Survey for Planetary Nebulae in M31 Globular Clusters

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A Survey for Planetary Nebulae in M31 Globular Clusters

Authors: George H. Jacoby, Robin Ciardullo, Orsola De Marco, Myung Gyoon Lee, Kimberly A. Herrmann, Ho Seong Hwang, Evan Kaplan, and James E. Davies

Jacoby et al. 2013 The Astrophysical Journal 769 10.

Provider: AAS Journals

Caption: Figure 4.

The spectra of an M31 globular cluster between 4800 Å and 5100 Å, showing our raw data, along with the data after sky subtraction, Doppler shifting, and template subtraction. Note that after template subtraction, the [O iii] λ5007 emission line is easily seen. This is a well-detected and well-measured emission-line source containing ~1000 counts in [O iii] λ5007.

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