1. SUMMARY FILES
1.1. SUMMARY : VVDS-FLAGS AND CONFIDENCE CLASSES
Flags should be assigned according to the following table
Secondary means that it is not the object targeted from the ADP selection. (Note that the centroid of a secondary object has a great chance not to be centred within the slit, and thus there is a loss in flux).
Confidence in redshift Primary Targets Secondary Identified Objects Secondary Non-Identified Objects Primary QSO Targets (a) Secondary QSO Identified Objects Secondary QSO Non-Identified Objects Primary Problematic Targets (b) Double Objects (c) Fake(d) Detections No redshift could be assigned 0
z = 9.999920
z = 9.9999-20
z = 9.9999- - - -10
z = 9.9999
-11
z = x.xxxx
-99
z = 9.9999
confidence 50%
(tentative z)1 21 -21 11
may-be-qso211 -211 - - - confidence 75% 2 22 -22 12
may-be-qso but secure z212 -212 - - - confidence
95%3 23 -23 13 213 -213 - - - confidence
100%4 24 -24 14 214 -213 - - - Single, secure, isolated emission line(e) 9 29 -29 19 219 -219 - - -
Identified means correct ID + I(AB) filled in the summary.
Non-Identified means ID and I(AB) set to zeros in the summary.
a
Examples of VVDS QSOs Flags (courtesy IG) b
Include the cases where the extracted target is a fake detection or a border object, while the target is visible in the 2D spectrum but has not been extracted. Do not extract objects manually! c
The spectrum is a blend of 2 objects, as visible either from the obejct extraction profile, or from emission lines misplaced wrt the continuum, or from 2 different systems of emission lines giving discordant redshifts. Flag -11 identifies these cases as "double objects". If a redshift can be measured, do measure it, otherwise put 9.9999, but in any case flag the object as -11 (new flag!). Do write in the comments anything you think can be useful in a second phase. At some point, somebody will go through all flag -11 and disentangle the various cases (spectra can be separated or not, photometry is deblended or not, etc). d It includes on-edge detections at the start or the end of the slit (i.e. in the spatial direction) even though it may be a real object because the shape of the extracted 1D spectrum is usually wrong in this case. e
line should be one of Ha, [OII], [Hb], [OIIIa]
SPECIAL REMARK When the extracted object is NOT the target, DO NOT CHANGE THE ID OF THE TARGET, put flag -10 instead (case b of above table). If 2 or more objects are extracted, and NONE of them is the target, identify as secondary the one with the nicest spectrum, and leave the ID of the target unchanged with flag -101.2. SUMMARY : REDSHIFTS
Redshifts in sumary files shall comply to the following rules
- Measured to the fourth decimal, i.e. z=0.5674
- Stars have z=0.0000
1.3 SUMMARY : COMMENTS
For each object, please write comments to help other people understand why you put such a redshift/flag. Tipycally, the list of lines onto which the redshift was based should be there, plus other usefull informations, as in the examples below
- Standard cases
3727 -3799 -3933 -3969 -4000 -4861 minus for absorption lines or break 4861 4959 5007 6563 no sign for emission lines
3727 4959 5007 [Double object at z=x.xxxx] (two line systems are visible within the "same" 1D continuum, example) 3727 4959 5007 [Double object with em. at lambda] (a line system is seen aside the 1D spectrum) -3581 3727? -4304 4861 (? for lines which are unsecure because on sky or nearby zero order...) 3727 continuum 6563 (for a single isolated emission line spectrum, flag=9) Star Type-M (for those stars where there is absolutely no confusion with a nearby galaxy spectrum) Star -2344 -2587 -2799 [Target ID=xxxx, mag=xx.xx has not been extracted] (in the case of a single 1D extraction in a slit and ID/mag replaced with the right object extracted) - Other cases
Flag = -10, z = 9.9999 (target not detected)
No object found [Continuum visible] DET must be NO as set by Vipgi No object found DET must be NO as set by Vipgi Bad extraction sky was badly subtracted, or obj. is contaminated by II order
Fake detection [Target has not been extracted] in the case of a single 1D extraction in a slit Wrong 1D spectrum extracted [Target has not been extracted] in the case of a single 1D extraction in a slit and ID/mag not solved Flag = -99, z = 9.9999 Fake
z=9.9999 (the ID and mag should be set to zeros, if not already done by VIPGI itself) Fake edge detection z=9.9999 (the ID and mag should be set to zeros, if not already done by VIPGI itself) Slit edge detection z=x.xxxx (the ID and mag may be found)
2. EXEMPLES AND REFERENCES OF SPECTRA
- Stellar SpectraPickles,1985,ApJSS,59,33 is a good reference for a display of set of various stellar spectra.
- VVDS spectraCombined VVDS spectra
- Galaxy SpectraKennicutt, ApJSS, 79,1992 is a good reference for a display of set of various galaxy spectra.
plot1 UV data in the Storchi-Bergmann, Calzetti & Kinney compilation plot2 UV data in the Storchi-Bergmann, Calzetti & Kinney compilation
- QSO Spectra
Examples from literature
Examples of VVDS QSOs
- Faint blue galaxy templates [1500-3000 Angs]
examples that is for galaxies at 1.4 <z< 3.5
- Spectra with Lyman_alpha [1000-1800 Angs]
2 plots with W(Lya)<-7Ang and -7<W(Lya)<7Ang from Steidel et al. 2004 2 plots with 7<W(Lya)<20Ang and W(Lya)>20Ang from Steidel et al. 2004 1 plot W(Lya)>0Ang from Shaple, Steidel, Pettini & Adelberger, 2003, in press (astro-ph/0301230)
3. SPECTRAL LINES
Below, the list of lines as known by VIPGI. Such list is in file "lines.dat", in the config directory under the VIPGI INSTALLATION tree. If wished you can edit (carefully) such file. In the following table, conventions are as follows
- When it is a doublet, then both lines should be observed.
- In red are the main lines for galaxies.
- A : Lines only in absorption, E : Lines only in emission, AE : Lines either in emission or in absorption.
- B : Main broad lines seen in AGN.
Lambda Label Lines 10320 [10320] E [SII] 9381 [9381.0] A CN 9190 [9190.0] A CN 8863 [8863.0] A TiO (stellar) 8542 [8542.0] A CaII 8430 [8430.0] A TiO (stellar) 8195 [8195.0] A NaI 8183 [8183.0] A NaI 7590 [7590.0] A TiO (stellar) 7325 [7325.0] E [OII]7319.0+7330.3 7136 [7135.8] E [ArIII] 7065 [7065.2] AE HeI 6725 [6725.0] E [SII]6717.0+6731.3 6678 [6678.1] AE HeI 6584 [6583.6] E [NII] (doublet-1) 6563 [6562.8] AE, B Halpha 6548 [6548.1] E [NII] (doublet-1/3) 6364 [6363.9] E [OI] (doublet-1) 6300 [6300.2] E [OI] (doublet-2) 6159 [6159.0] A TiO (stellar) 5893 [5892.5] A NaD 5876 [5875.6] AE HeI 5615 [5615.0] A FeI 5603 [5603.0] A TiO (stellar) 5411 [5411.0] AE HeII 5324 [5324.0] A FeI 5269 [5269.0] A Ca, Fe 5232 [5232.0] A FeI 5175 [5175.4] A MgI 5007 [5006.8] E [OIII] (doublet-1) 4959 [4958.9] E [OIII] (doublet-1/3) 4861 [4861.3] AE, B Hbeta 4686 [4685.7] AE HeII 4471 [4471.6] AE HeI 4466 [4466.0] A FeI 4384 [4383.6] A FeI 4363 [4363.2] E [OIII] 4340 [4340.4] AE Hgamma 4304 [4304.4] A Gband 4271 [4271.0] A FeI 4260 [4260.0] A FeI 4227 [4226.7] A CaI, FeI 4216 [4216.0] A CN 4102 [4101.7] AE Hdelta 4000 [4000.0] Break Balmer break 4072 [4072.0] E [SII]4068.6+4076.2 4045 [4045.0] A FeI 3968 [3967.5] E [NeIII] (doublet-1) 3970 [3970.1] AE Hepsilon 3969 [3968.5] A CaII H 3934 [3933.7] A CaII K 3889 [3889.1] AE Hksi, CN (H8) 3889 [3888.8] AE HeI 3869 [3868.7] E [NeIII] (doublet-2) 3835 [3835.4] A FeI, H9(AE) 3818 [3818.0] A FeI 3798 [3797.9] AE Hteta 3771 [3770.6] AE H11 3734 [3734.4] A FeI, H13(AE) 3727 [3727.5] E [OII] 3722 [3722.0] AE H14 3581 [3581.0] A FeI 3426 [3425.8] E [NeV] (doublet-1) 3346 [3345.9] E [NeV] (doublet-2) 3191 [3191.0] E FeII 3134 [3134.0] E [OIII] 2964 [2964.0] E FeII, Broad bump in AGN 2853 [2852.9] A MgI 2799 [2799.0] AE, B MgII 2626 [2626.0] E FeII 2600 [2600.0] A FeII 2586 [2586.7] A FeII 2424 [2424.0] E [NeIV] 2382 [2382.0] A FeII 2374 [2374.0] A FeII 2344 [2344.2] A FeII 2326 [2326.0] E CII, FeII 2260 [2260.0] A FeII 2142 [2142.0] E [NII] 2077 [2077.0] A FeIII 1909 [1909.0] E, B [CIII] 1856 [1856.0] A AlIII 1671 [1670.8] A AlII 1640 [1640.0] AE HeII 1608 [1608.5] A FeII 1549 [1549.0] AE, B CIV 1548+1550 1527 [1526.7] A SiII 1397 [1397.0] AE, B SiIV 1393 + OIV 1402 1334 [1334.5] A CII 1303 [1303.0] A [OI]1302+1304 1260 [1260.4] A SiII 1240 [1240.0] AE NV 1216 [1215.7] AE, B LyA 1033 [1033.0] AE OVI 1026 [1025.6] AE LyB 973 [ 972.5] AE LyG