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1| Overview
SpT = K:
HD_196725 (K3Ib, Z=0.22)
Other SpT:
O B A F G || M Unknown Telluric
UVES NGSL Project: HD_196725
1 Overview   2 Quality plots   3 Detailed spectra   [download tar]
Top: All flux-calibrated spectra
(green: STIS spectrum for comparison, if available)


Bottom: approximate S/N (= signal/errors).

All data rebinned to 5A.





SPECTRA RANGE [A] SETUP OB ID OB GRADE FILE HDR N EXPT TEXP SLITW SEEING AIRM RV
helio
RV
shift
comm.
  0   1   2   3 3300-3850 BLU_346 207869
A
r.UVES.2005-10-14T02:07:24.071_0017_rvc.fits hdr 1 250 250 1. 0.785 1.587 -23.63 14.99  
  0   1   2   3   4 3830-4950 BLU_437 207870
A
r.UVES.2005-10-14T02:20:39.676_0017_rvc.fits hdr 2 50 100 1. 0.69 1.6565 -23.65
  0   1   2   3 4900-5750 REDL_580 207869
A
r.UVES.2005-10-14T02:12:02.751_0017_rvc.fits hdr 5 18 90 0.9 0.75 1.6025 -23.64
  0   1   2   3 5810-6770 REDU_580 207869
A
r.UVES.2005-10-14T02:12:02.751_0036_rvc.fits hdr 5 18 90 0.9 0.75 1.6025 -23.64
  0   1   2   3   4 6770-8500 REDL_860 207870
A
r.UVES.2005-10-14T02:23:15.342_0017_rvc.fits hdr 5 12 60 0.9 0.73 1.672 -23.65
  0   1   2   3   4 8650-10150 REDU_860 207870
A
r.UVES.2005-10-14T02:23:15.342_0036_rvc.fits hdr 5 12 60 0.9 0.73 1.672 -23.65

TARGET HD_196725, DATE 2005-10-13

Find here an overview of the spectral plots.

SPECTRA: This column links to full views with 30 or 50 A panels of the co-added spectra (available also under "2| Detailed spectra").

RANGE: wavelength range of the spectra in A.

SETUP: CCD and central wavelength [in nm]. BLU stands for the blue CCD, REDL is the lower RED, REDU the upper red CCD.

OB ID: Observing Block (OB) number. Each target has normally been observed in two OBs, covering the whole wavelength range.

OB GRADE: on-site quality control: A - fully within constraints; B - almost within constraints; C - constraints violated, repeated if possible; X - unknown (no grade given); comments added by night astronomer

FILE: name of the product file plotted here ('_rvc' indicating that pipeline products have been fluxed, averaged, and RV corrected).

HDR: header of first parent raw file.

N: number of single exposures co-added for the final spectrum, hyper-linked is the comparison plot for all input spectra.

EXPT: exposure time in seconds for single exposure.

TEXP: total exposure time in seconds for co-added product (as displayed here).

SLITW: slit width in arcsecs.

SEEING: Averaged DIMM seeing value from begin and end of first exposure. n/a: no data available. An asterisk marks values applicable for begin or end of exposure only.

AIRM: Averaged airmass value from begin and end of first exposure.

RV_helio: Applied heliocentric radial velocity correction, in km/s.

RV_shift: Radial velocity correction in km/s, applied to bring all spectra to a common reference frame. 0: no RV correction applied

comm.: any reduction comment.

NOTE: The spectra have a common RV scale (except for the telluric reference spectra). This means they have been corrected to the heliocentric reference frame (RV_helio) and from there to a common reference frame (RV_shift). All spectra have been shifted to match a reference spectrum. The reference spectrum has been shifted to match lab H-alpha (6562.793 A). All shifting has been done in RV space, achieved by logarithmic binning from wavelength space to RV space, then apply RV corrections, then exponential binning back to wavelength.

The panel plots have flux in physical units, 1e-13 erg/s/cm**2/A. Data are corrected for atmospheric extinction. The abscissa is in Angstroem.

The flux scale has been fine-tuned to minimize steps between setups. These are likely to be due to slit losses. Corrections have been anything between negligible and considerable, depending on the seeing during the exposures. There have been cases with seeing much better than the slit width, but also cases with a considerable fraction of flux lost due to bad seeing. Check columns 'SLITW' and 'SEEING'.

For details about the flux calibration with the UVES pipeline check out here.

The overview plot has
- the full spectrum (rebinned to 5 A) on top ('overview');
- a signal/noise plot based on the ratio spectrum/errorbar (the errorbar spectrum as delivered by the pipeline) properly scaled by the number of averaged spectra.