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SLIDE 1

❯♥❞❡rst❛♥❞✐♥❣ ❙t❡❧❧❛r ❇✐rt❤ ❚❤r♦✉❣❤ t❤❡ P❤♦t♦♠❡tr✐❝ ❛♥❞ ❙♣❡❝tr♦s❝♦♣✐❝ ❱❛r✐❛❜✐❧✐t② ♦❢ ❚ ❚❛✉r✐ ❙t❛rs

▼✐❝❤❛❡❧ ❲✳ ❊❛st✇♦♦❞✱ ◆❛✈❡❞ ▼❛❤♠✉❞✱ ❉r✳ ❈❤r✐st♦♣❤❡r ▼✳ ❏♦❤♥s✲❑r✉❧❧

❉❡♣❛rt♠❡♥t ♦❢ P❤②s✐❝s ❛♥❞ ❆str♦♥♦♠② ❘✐❝❡ ❯♥✐✈❡rs✐t② ❍♦✉st♦♥✱ ❚❡①❛s

❚❡①❛s ❆str♦♥♦♠② ❯♥❞❡r❣r❛❞✉❛t❡ ❘❡s❡❛r❝❤ ❙②♠♣♦s✐✉♠ ✷✵✶✶

✶ ♦❢ ✶✹

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SLIDE 2

❚❛❜❧❡ ♦❢ ❈♦♥t❡♥ts

❚ ❚❛✉r✐ ❙t❛rs ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ▼❛❣♥❡t✐❝❛❧❧② ●❡♥❡r❛t❡❞ ❈♦♦❧ ❙♣♦ts ❆❝❝r❡t✐♦♥ ❙❤♦❝❦s ❙♣❡❝tr❛❧ ▲✐♥❡ ❱❡✐❧✐♥❣ ▼❡❛s✉r❡♠❡♥ts ❚❛r❣❡ts P❤♦t♦♠❡tr② ❛♥❞ ❙♣❡❝tr♦s❝♦♣② P❡r✐♦❞✐❝✐t② ❙♣❡❝tr❛❧ ▲✐♥❡ ❱❡✐❧✐♥❣

✷ ♦❢ ✶✹

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SLIDE 3

❚ ❚❛✉r✐ ❙t❛rs

☎ ❙t❡❧❧❛r ❋♦r♠❛t✐♦♥ ☎ ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❖♣t✐❝❛❧ ✈❛r✐❛❜✐❧✐t② ✄ ▲❛t❡ s♣❡❝tr❛❧ t②♣❡ ✭❋✲▼✮ ✄ ■♥❢r❛r❡❞ ❡①❝❡ss ✄ ❯❧tr❛✈✐♦❧❡t ❡①❝❡ss ✄ ▲✐t❤✐✉♠ ❛❜s♦r♣t✐♦♥ ❧✐♥❡s ✄ ❇❛❧♠❡r ❡♠✐ss✐♦♥ ❧✐♥❡s ✄ P ❈②❣♥✐ ❧✐♥❡ ♣r♦☞❧❡ ☎ P❤②s✐❝❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❍♦t ❛♥❞ ❝♦♦❧ s♣♦ts ✄ ❚②♣✐❝❛❧❧② ▼ ❁ ✸▼☞ ✄ ❆❣❡ ✙ ✷ ✸ ♠✐❧❧✐♦♥ ②❡❛rs ✄ ❆❝❝r❡t✐♦♥ ❞✐s❦ ✭❈❚❚❙ ♦♥❧② ✄ ❙t❡❧❧❛r ♦✉t✌♦✇ ✭✇✐♥❞✱ ❥❡t✮ ✸ ♦❢ ✶✹

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SLIDE 4

❚ ❚❛✉r✐ ❙t❛rs

☎ ❙t❡❧❧❛r ❋♦r♠❛t✐♦♥ ☎ ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❖♣t✐❝❛❧ ✈❛r✐❛❜✐❧✐t② ✄ ▲❛t❡ s♣❡❝tr❛❧ t②♣❡ ✭❋✲▼✮ ✄ ■♥❢r❛r❡❞ ❡①❝❡ss ✄ ❯❧tr❛✈✐♦❧❡t ❡①❝❡ss ✄ ▲✐t❤✐✉♠ ❛❜s♦r♣t✐♦♥ ❧✐♥❡s ✄ ❇❛❧♠❡r ❡♠✐ss✐♦♥ ❧✐♥❡s ✄ P ❈②❣♥✐ ❧✐♥❡ ♣r♦☞❧❡ ☎ P❤②s✐❝❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❍♦t ❛♥❞ ❝♦♦❧ s♣♦ts ✄ ❚②♣✐❝❛❧❧② ▼ ❁ ✸▼☞ ✄ ❆❣❡ ✙ ✷ ✸ ♠✐❧❧✐♦♥ ②❡❛rs ✄ ❆❝❝r❡t✐♦♥ ❞✐s❦ ✭❈❚❚❙ ♦♥❧② ✄ ❙t❡❧❧❛r ♦✉t✌♦✇ ✭✇✐♥❞✱ ❥❡t✮ ✸ ♦❢ ✶✹

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SLIDE 5

❚ ❚❛✉r✐ ❙t❛rs

☎ ❙t❡❧❧❛r ❋♦r♠❛t✐♦♥ ☎ ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❖♣t✐❝❛❧ ✈❛r✐❛❜✐❧✐t② ✄ ▲❛t❡ s♣❡❝tr❛❧ t②♣❡ ✭❋✲▼✮ ✄ ■♥❢r❛r❡❞ ❡①❝❡ss ✄ ❯❧tr❛✈✐♦❧❡t ❡①❝❡ss ✄ ▲✐t❤✐✉♠ ❛❜s♦r♣t✐♦♥ ❧✐♥❡s ✄ ❇❛❧♠❡r ❡♠✐ss✐♦♥ ❧✐♥❡s ✄ P ❈②❣♥✐ ❧✐♥❡ ♣r♦☞❧❡ ☎ P❤②s✐❝❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❍♦t ❛♥❞ ❝♦♦❧ s♣♦ts ✄ ❚②♣✐❝❛❧❧② ▼ ❁ ✸▼☞ ✄ ❆❣❡ ✙ ✷ ✸ ♠✐❧❧✐♦♥ ②❡❛rs ✄ ❆❝❝r❡t✐♦♥ ❞✐s❦ ✭❈❚❚❙ ♦♥❧② ✄ ❙t❡❧❧❛r ♦✉t✌♦✇ ✭✇✐♥❞✱ ❥❡t✮ ✸ ♦❢ ✶✹

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SLIDE 6

❚ ❚❛✉r✐ ❙t❛rs

☎ ❙t❡❧❧❛r ❋♦r♠❛t✐♦♥ ☎ ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❖♣t✐❝❛❧ ✈❛r✐❛❜✐❧✐t② ✄ ▲❛t❡ s♣❡❝tr❛❧ t②♣❡ ✭❋✲▼✮ ✄ ■♥❢r❛r❡❞ ❡①❝❡ss ✄ ❯❧tr❛✈✐♦❧❡t ❡①❝❡ss ✄ ▲✐t❤✐✉♠ ❛❜s♦r♣t✐♦♥ ❧✐♥❡s ✄ ❇❛❧♠❡r ❡♠✐ss✐♦♥ ❧✐♥❡s ✄ P ❈②❣♥✐ ❧✐♥❡ ♣r♦☞❧❡ ☎ P❤②s✐❝❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❍♦t ❛♥❞ ❝♦♦❧ s♣♦ts ✄ ❚②♣✐❝❛❧❧② ▼ ❁ ✸▼☞ ✄ ❆❣❡ ✙ ✷ ✸ ♠✐❧❧✐♦♥ ②❡❛rs ✄ ❆❝❝r❡t✐♦♥ ❞✐s❦ ✭❈❚❚❙ ♦♥❧② ✄ ❙t❡❧❧❛r ♦✉t✌♦✇ ✭✇✐♥❞✱ ❥❡t✮ ✸ ♦❢ ✶✹

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SLIDE 7

❚ ❚❛✉r✐ ❙t❛rs

☎ ❙t❡❧❧❛r ❋♦r♠❛t✐♦♥ ☎ ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❖♣t✐❝❛❧ ✈❛r✐❛❜✐❧✐t② ✄ ▲❛t❡ s♣❡❝tr❛❧ t②♣❡ ✭❋✲▼✮ ✄ ■♥❢r❛r❡❞ ❡①❝❡ss ✄ ❯❧tr❛✈✐♦❧❡t ❡①❝❡ss ✄ ▲✐t❤✐✉♠ ❛❜s♦r♣t✐♦♥ ❧✐♥❡s ✄ ❇❛❧♠❡r ❡♠✐ss✐♦♥ ❧✐♥❡s ✄ P ❈②❣♥✐ ❧✐♥❡ ♣r♦☞❧❡ ☎ P❤②s✐❝❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❍♦t ❛♥❞ ❝♦♦❧ s♣♦ts ✄ ❚②♣✐❝❛❧❧② ▼ ❁ ✸▼☞ ✄ ❆❣❡ ✙ ✷ ✸ ♠✐❧❧✐♦♥ ②❡❛rs ✄ ❆❝❝r❡t✐♦♥ ❞✐s❦ ✭❈❚❚❙ ♦♥❧② ✄ ❙t❡❧❧❛r ♦✉t✌♦✇ ✭✇✐♥❞✱ ❥❡t✮ ✸ ♦❢ ✶✹

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SLIDE 8

❚ ❚❛✉r✐ ❙t❛rs

☎ ❙t❡❧❧❛r ❋♦r♠❛t✐♦♥ ☎ ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❖♣t✐❝❛❧ ✈❛r✐❛❜✐❧✐t② ✄ ▲❛t❡ s♣❡❝tr❛❧ t②♣❡ ✭❋✲▼✮ ✄ ■♥❢r❛r❡❞ ❡①❝❡ss ✄ ❯❧tr❛✈✐♦❧❡t ❡①❝❡ss ✄ ▲✐t❤✐✉♠ ❛❜s♦r♣t✐♦♥ ❧✐♥❡s ✄ ❇❛❧♠❡r ❡♠✐ss✐♦♥ ❧✐♥❡s ✄ P ❈②❣♥✐ ❧✐♥❡ ♣r♦☞❧❡ ☎ P❤②s✐❝❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❍♦t ❛♥❞ ❝♦♦❧ s♣♦ts ✄ ❚②♣✐❝❛❧❧② ▼ ❁ ✸▼☞ ✄ ❆❣❡ ✙ ✷ ✸ ♠✐❧❧✐♦♥ ②❡❛rs ✄ ❆❝❝r❡t✐♦♥ ❞✐s❦ ✭❈❚❚❙ ♦♥❧② ✄ ❙t❡❧❧❛r ♦✉t✌♦✇ ✭✇✐♥❞✱ ❥❡t✮ ✸ ♦❢ ✶✹

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SLIDE 9

❚ ❚❛✉r✐ ❙t❛rs

☎ ❙t❡❧❧❛r ❋♦r♠❛t✐♦♥ ☎ ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❖♣t✐❝❛❧ ✈❛r✐❛❜✐❧✐t② ✄ ▲❛t❡ s♣❡❝tr❛❧ t②♣❡ ✭❋✲▼✮ ✄ ■♥❢r❛r❡❞ ❡①❝❡ss ✄ ❯❧tr❛✈✐♦❧❡t ❡①❝❡ss ✄ ▲✐t❤✐✉♠ ❛❜s♦r♣t✐♦♥ ❧✐♥❡s ✄ ❇❛❧♠❡r ❡♠✐ss✐♦♥ ❧✐♥❡s ✄ P ❈②❣♥✐ ❧✐♥❡ ♣r♦☞❧❡ ☎ P❤②s✐❝❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❍♦t ❛♥❞ ❝♦♦❧ s♣♦ts ✄ ❚②♣✐❝❛❧❧② ▼ ❁ ✸▼☞ ✄ ❆❣❡ ✙ ✷ ✸ ♠✐❧❧✐♦♥ ②❡❛rs ✄ ❆❝❝r❡t✐♦♥ ❞✐s❦ ✭❈❚❚❙ ♦♥❧② ✄ ❙t❡❧❧❛r ♦✉t✌♦✇ ✭✇✐♥❞✱ ❥❡t✮ ✸ ♦❢ ✶✹

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SLIDE 10

❚ ❚❛✉r✐ ❙t❛rs

☎ ❙t❡❧❧❛r ❋♦r♠❛t✐♦♥ ☎ ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❖♣t✐❝❛❧ ✈❛r✐❛❜✐❧✐t② ✄ ▲❛t❡ s♣❡❝tr❛❧ t②♣❡ ✭❋✲▼✮ ✄ ■♥❢r❛r❡❞ ❡①❝❡ss ✄ ❯❧tr❛✈✐♦❧❡t ❡①❝❡ss ✄ ▲✐t❤✐✉♠ ❛❜s♦r♣t✐♦♥ ❧✐♥❡s ✄ ❇❛❧♠❡r ❡♠✐ss✐♦♥ ❧✐♥❡s ✄ P ❈②❣♥✐ ❧✐♥❡ ♣r♦☞❧❡ ☎ P❤②s✐❝❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ✄ ❍♦t ❛♥❞ ❝♦♦❧ s♣♦ts ✄ ❚②♣✐❝❛❧❧② ▼ ❁ ✸▼☞ ✄ ❆❣❡ ✙ ✷ ✸ ♠✐❧❧✐♦♥ ②❡❛rs ✄ ❆❝❝r❡t✐♦♥ ❞✐s❦ ✭❈❚❚❙ ♦♥❧② ✄ ❙t❡❧❧❛r ♦✉t✌♦✇ ✭✇✐♥❞✱ ❥❡t✮ ✸ ♦❢ ✶✹

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SLIDE 11

▼❛❣♥❡t✐❝❛❧❧② ●❡♥❡r❛t❡❞ ❈♦♦❧ ❙♣♦ts

P❤♦t♦♠❡tr② ❱❛r✐❛❜✐❧✐t② P ✙ Pr♦t❛t✐♦♥ ❙♣❡❝tr♦s❝♦♣② ❋❛❦❡ r❛❞✐❛❧ ✈❡❧♦❝✐t② s✐❣♥❛t✉r❡

✹ ♦❢ ✶✹

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SLIDE 12

❆❝❝r❡t✐♦♥ ❙❤♦❝❦s

❋✐❣✉r❡✿ ◆❆❙❆✳ ❤tt♣✿✴✴✇✇✇✳s♣✐t③❡r✳❝❛❧t❡❝❤✳❡❞✉✴✐♠❛❣❡s✴✶✻✹✶✲ss❝✷✵✵✻✲✶✺❛✲ ❙t❛rs✲❈❛♥✲t✲❙♣✐♥✲❖✉t✲♦❢✲❈♦♥tr♦❧

P❤♦t♦♠❡tr② ❯❧tr❛✈✐♦❧❡t ❡①❝❡ss ❙♣❡❝tr♦s❝♦♣② ❙♣❡❝tr❛❧ ❧✐♥❡ ✈❡✐❧✐♥❣

✺ ♦❢ ✶✹

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SLIDE 13

❙♣❡❝tr❛❧ ▲✐♥❡ ❱❡✐❧✐♥❣

☎ ❊①❝✐t❛t✐♦♥ ❛♥❞ ✐♦♥✐③❛t✐♦♥ ✐s t❡♠♣❡r❛t✉r❡ ❞❡♣❡♥❞❡♥t ☎ ❊q✉✐✈❛❧❡♥t ✇✐❞t❤ ♦❢ s♣❡❝tr❛❧ ❧✐♥❡s ✐s t❡♠♣❡r❛t✉r❡ ❞❡♣❡♥❞❡♥t ☎ ▼❡❛s✉r❡❞ ✐♥ ✉♥✐ts ♦❢ st❡❧❧❛r ❝♦♥t✐♥✉❛ ✻ ♦❢ ✶✹

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SLIDE 14

❚❛❜❧❡ ♦❢ ❈♦♥t❡♥ts

❚ ❚❛✉r✐ ❙t❛rs ❖❜s❡r✈❛t✐♦♥❛❧ ❈❤❛r❛❝t❡r✐st✐❝s ▼❛❣♥❡t✐❝❛❧❧② ●❡♥❡r❛t❡❞ ❈♦♦❧ ❙♣♦ts ❆❝❝r❡t✐♦♥ ❙❤♦❝❦s ❙♣❡❝tr❛❧ ▲✐♥❡ ❱❡✐❧✐♥❣ ▼❡❛s✉r❡♠❡♥ts ❚❛r❣❡ts P❤♦t♦♠❡tr② ❛♥❞ ❙♣❡❝tr♦s❝♦♣② P❡r✐♦❞✐❝✐t② ❙♣❡❝tr❛❧ ▲✐♥❡ ❱❡✐❧✐♥❣

✼ ♦❢ ✶✹

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SLIDE 15

❚❛r❣❡ts

❇P ❚❛✉ ❉◆ ❚❛✉ ❍✉❜❜❧❡ ✹

☎ ■♠❛❣❡s✿ ❙❧♦❛♥ ❉✐❣✐t❛❧ ❙❦② ❙✉r✈❡② ✽ ♦❢ ✶✹

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SLIDE 16

❉❛t❛

P❤♦t♦♠❡tr②

☎ ▼❝❉♦♥❛❧❞ ❖❜s❡r✈❛t♦r② ☎ ❇❱❘ ♣❤♦t♦♠❡tr② ☎ ✵✳✽♠ t❡❧❡s❝♦♣❡ ☎ ❉❛t❛ ❢r♦♠ ✷✵✵✹✲✷✵✶✶ ☎ ❖❜s❡r✈✐♥❣ r✉♥s t②♣✐❝❛❧❧② ✺✲✼

❞❛②s ✭❛❜♦✉t ✶ ♣❡r ②❡❛r✮ ❙♣❡❝tr♦s❝♦♣②

☎ ▼❝❉♦♥❛❧❞ ❖❜s❡r✈❛t♦r② ☎ ✷✳✶♠ ❖tt♦ ❙tr✉✈❡ t❡❧❡s❝♦♣❡ ☎ ✷✳✼♠ ❍❛r❧❛♥ ❏✳ ❙♠✐t❤ t❡❧❡s❝♦♣❡ ☎ ❚❛❦❡♥ s✐♠✉❧t❛♥❡♦✉s❧② ✇✐t❤ t❤❡

♣❤♦t♦♠❡tr② ❞❛t❛

☎ ❘❡❞✉❝❡❞ ❜② ◆❛✈❡❞ ✾ ♦❢ ✶✹

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SLIDE 17

▼❡❛s✉r✐♥❣ P❡r✐♦❞✐❝✐t②

5.3366 5.3368 5.337 5.3372 5.3374 5.3376 x 10

4

3.1 3.2 3.3 3.4 3.5 3.6 HJD Instrumental Magnitude data/DN Tau/ ☎ ❚❛❦❡ ❋♦✉r✐❡r tr❛♥s❢♦r♠ ✶✵ ♦❢ ✶✹

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SLIDE 18

P❡r✐♦❞✐❝✐t②

5 10 15 0.5 1 1.5 2 2.5 3 Period / Days Lomb−Scargle Amplitude

❋✐❣✉r❡✿ ❍✉❜❜❧❡ ✹✳ ❱✐s✉❛❧ ♣❤♦t♦♠❡tr②✳ ◆♦✈ ✷✵✵✼✳

☎ ◆♦ str♦♥❣ s✐❣♥❛❧s ☎ ◆♦t ❡♥♦✉❣❤ ♣♦✐♥ts ✶✶ ♦❢ ✶✹

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SLIDE 19

▼❡❛s✉r✐♥❣ ❙♣❡❝tr❛❧ ▲✐♥❡ ❱❡✐❧✐♥❣

20 40 60 80 100 0.4 0.5 0.6 0.7 0.8 0.9 1 ☎ ❈♦♥t✐♥✉✉♠ ♥♦r♠❛❧✐③❡ ☎ ✈❡✐❧❡❞ s♣❡❝tr✉♠ ❂ ✉♥✈❡✐❧❡❞✰✈❡✐❧✐♥❣

✶✰✈❡✐❧✐♥❣

☎ ✤✷ ☞t t♦ ♠❡❛s✉r❡ t❤❡ ✈❡✐❧✐♥❣ ✶✷ ♦❢ ✶✹

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SLIDE 20

❙♣❡❝tr❛❧ ▲✐♥❡ ❱❡✐❧✐♥❣

−0.2 0.2 0.4 0.6 0.8 1 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Veiling Instrumental Magnitude (B)

❋✐❣✉r❡✿ ❇P ❚❛✉✳ ❇ ♣❤♦t♦♠❡tr② ❛♥❞ s♣❡❝tr❛❧ ❧✐♥❡ ✈❡✐❧✐♥❣✳

−0.2 0.2 0.4 0.6 0.8 1 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Veiling Instrumental Magnitude (V)

❋✐❣✉r❡✿ ❇P ❚❛✉✳ ❱ ♣❤♦t♦♠❡tr② ❛♥❞ s♣❡❝tr❛❧ ❧✐♥❡ ✈❡✐❧✐♥❣✳

✶✸ ♦❢ ✶✹

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SLIDE 21

❙♣❡❝tr❛❧ ▲✐♥❡ ❱❡✐❧✐♥❣

−0.2 −0.1 0.1 0.2 0.3 3.1 3.15 3.2 3.25 3.3 3.35 Veiling Instrumental Magnitude (R)

❋✐❣✉r❡✿ ❉◆ ❚❛✉✳ ❘ ♣❤♦t♦♠❡tr② ❛♥❞ s♣❡❝tr❛❧ ❧✐♥❡ ✈❡✐❧✐♥❣✳

−0.05 0.05 0.1 0.15 0.2 0.25 2.45 2.5 2.55 2.6 2.65 2.7 2.75 Veiling Instrumental Magnitude (B)

❋✐❣✉r❡✿ ❍✉❜❜❧❡ ✹✳ ❇ ♣❤♦t♦♠❡tr② ❛♥❞ s♣❡❝tr❛❧ ❧✐♥❡ ✈❡✐❧✐♥❣✳

✶✸ ♦❢ ✶✹

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SLIDE 22

❚❤❛♥❦ ❨♦✉

◗✉❡st✐♦♥s❄

✶✹ ♦❢ ✶✹