HIGH-RESOLUTION SPECTROSCOPY

OF THE MAGPOP-ITP dEs

La Palma International Time Programme

ELISA TOLOBAELISA TOLOBA

Universidad Complutense de Madrid, Spain

Instrumental Configuration (ISIS-WHT)

5 spectral ranges in 3 shots (using dichroics)5 spectral ranges in 3 shots (using dichroics)

Resolution Resolution FWHM 1.56FWHM 1.56ǺǺ (R=3100(R=3100) in the blue; ) in the blue; FWHM FWHM 3.223.22ǺǺ (R=2400(R=2400) in the red ) in the red

2 arcsec width slit2 arcsec width slit Exposure times needed: 3000 – 5000 secs per rangeExposure times needed: 3000 – 5000 secs per range

2.5 – 4 hours /galaxy2.5 – 4 hours /galaxy

4000 800070005000 6000 Ǻ

B1 (3500-4300 Ǻ)

B2 (4100-4900 Ǻ)

B3 (4800-5600 Ǻ)

R1 (5500-6700 Ǻ) R2 (7750-8950 Ǻ)

SAMPLE (I)GALAXYGALAXY RA(2000RA(2000

))DEC(2000DEC(2000

))EXPOSURE TIME EXPOSURE TIME

(S)(S)NGC3073NGC3073

10h00m52s10h00m52s 55º37’08’’55º37’08’’

B1B1 32003200

B2B2 30003000

B3B3 32003200

R1R1 32003200

R2R2 30003000

ID0734ID0734

02h41m35s02h41m35s -08º10’25’’-08º10’25’’

B1B1 54005400

B2B2 36003600

B3B3 42274227

R1R1 36003600

R2R2 54005400

SAMPLE (II)GALAXYGALAXY RA(2000RA(2000

))DEC(2000DEC(2000

))EXPOSURE TIME EXPOSURE TIME

(S)(S)ID0872ID0872

02h42m00s02h42m00s 00º00’52’’00º00’52’’

B1B1 36003600

B2B2 36003600

B3B3 36003600

R1R1 36003600

R2R2 36003600

NGC4306NGC4306

12h22m04s12h22m04s 12º47’15’’12º47’15’’

B1B1 34003400

B2B2 34003400

B3B3 22762276

R1R1 34003400

R2R2 34003400

REDUCTION PROCESS

REDUCEME (Cardiel 1999)

BiasBias

FlatFlat

DarkDark

TwilightTwilight

Wavelength calibration (Arcs)Wavelength calibration (Arcs)

Flux calibration (MILES stars)Flux calibration (MILES stars)

Building the final spectra: Building the final spectra:

Composition of 5 spectral Composition of 5 spectral

rangesranges

SPECTRA OBTAINED

(S/N)Å=129

(S/N)Å=31

(S/N)Å=33

(S/N)Å=47

SPECTRA OBTAINED

(S/N)Å=129

(S/N)Å=31

(S/N)Å=33

(S/N)Å=47

SPECTRAL FITS (I)

SPECTRAL FITS (II)

SPECTRAL FITS (III)

SPECTRAL FITS (IV)

INDEX-INDEX DIAGRAMS