2025-11-19T10:27:26Z 100 Hamburg/ESO Survey Spectra The Hamburg/ESO survey (HES) is a digital objective prism survey covering the total southern extragalactic sky. It is based on Kodak IIIa-J plates which have been taken with the 1m ESO Schmidt telescope and its 4° prism. The spectral coverage is 3200-5300 Å, at an resolution of 15 Å at H gamma. The magnitude range covered is roughly between 18.5 and 11 mag in B_J. This is a collection of uniformly reduced spectra prepared by Norbert Christlieb. It is also intended as a sort-of resolver for HES names (“identifiers“) like ”HE 2301-7732” (these are B1950 coordinates) or “HE000000m090649d2856” (these are J2000). The shorter form usually matches multiple objects, and you will need to apply domain knowledge in order to find the object actually being referred to when resolving a short HE identifier. spectroscopy surveys schmidt-cameras astronomical-object-identification Reimers, D.; Wisotzki, L; Christlieb, N. 1m ESO Schmidt Hamburger Sternwarte; ESO La Silla A&A...358...77W Research Survey Optical survey archival spectrum MAXREC=1 # the wavelengths (in angstrom) at the coordinates along axis 1 # of the spectrum FITSes computed by res/calib.py rd.lambdas = [5752.560175491419, 5730.763596550914, 5709.221636881887, 5687.929405212022, 5666.882140644632, 5646.075208226229, 5625.504094696857, 5605.164404414354, 5585.051855444196, 5565.162275807008, 5545.491599876322, 5526.03586491949, 5506.7912077751, 5487.753861660555, 5468.920153103873, 5450.286498993956, 5431.849403744061, 5413.6054565632985, 5395.55132883136, 5377.683771571889, 5359.99961302015, 5342.495756280844, 5325.169177072178, 5308.016921552434, 5291.036104225514, 5274.223905922082, 5257.577571853106, 5241.094409732739, 5224.771787967667, 5208.6071339101145, 5192.597932171941, 5176.7417229972525, 5161.036100691204, 5145.47871210267, 5130.0672551586395, 5114.799477448255, 5099.6731748545235, 5084.686190231809, 5069.836412127317, 5055.121773544848, 5040.540250749167, 5026.089862109444, 5011.768666980247, 4997.574764618663, 4983.506293136178, 4969.561428483996, 4955.73838347056, 4942.035406810053, 4928.450782200756, 4914.982827432138, 4901.629893519639, 4888.39036386614, 4875.262653449144, 4862.245208032736, 4849.3365034034605, 4836.53504462923, 4823.839365340473, 4811.248027032726, 4798.759618389922, 4786.372754627649, 4774.086076855692, 4761.898251459188, 4749.807969497768, 4737.813946122026, 4725.914920006812, 4714.1096528006965, 4702.396928591095, 4690.775553384548, 4679.244354601622, 4667.802180585964, 4656.447900127043, 4645.18040199611, 4633.998594494987, 4622.901405017222, 4611.887779621242, 4600.956682615112, 4590.107096152515, 4579.338019839619, 4568.6484703524675, 4558.037481064572, 4547.5041016843825, 4537.047397902332, 4526.666451047147, 4516.360357751158, 4506.128229624309, 4495.969192936619, 4485.882388308829, 4475.866970410984, 4465.92210766872, 4456.046981977014, 4446.2407884211825, 4436.502735004908, 4426.832042385083, 4417.227943613276, 4407.6896838836265, 4398.216520286965, 4388.807721571007, 4379.462567906411, 4370.18035065855, 4360.960372164845, 4351.801945517458, 4342.704394351251, 4333.667052636809, 4324.689264478415, 4315.770383916826, 4306.909774736724, 4298.106810278695, 4289.360873255637, 4280.671355573445, 4272.037658155879, 4263.459190773491, 4254.93537187649, 4246.465628431464, 4238.049395761828, 4229.686117391916, 4221.375244894603, 4213.1162377423825, 4204.908563161791, 4196.751695991096, 4188.645118541167, 4180.588320459435, 4172.5807985968695, 4164.622056877891, 4156.711606173139, 4148.848964175029, 4141.033655276016, 4133.265210449513, 4125.543167133369, 4117.867069115874, 4110.236466424202, 4102.650915215239, 4095.1099776687347, 4087.6132218827292, 4080.160221771178, 4072.750556963742, 4065.383812707671, 4058.0595797717465, 4050.777454352212, 4043.537037980664, 4036.337937433839, 4029.179764645264, 4022.0621366187083, 4014.9846753434144, 4007.9470077110445, 4000.9487654343197, 3993.989584967293, 3987.069107427238, 3980.1869785180966, 3973.342848455456, 3966.536371893026, 3959.767207850568, 3953.0350196432523, 3946.339474812406, 3939.6802450576206, 3933.057006170185, 3926.469437967819, 3919.917224230672, 3913.4000526385626, 3906.917614709422, 3900.4696057389306, 3894.0557247413003, 3887.675674391195, 3881.3291609667476, 3875.0158942936655, 3868.7355876903835, 3862.4879579142553, 3856.2727251087517, 3850.089612751645, 3843.9383476041603, 3837.818659661071, 3831.730282101716, 3825.672951241923, 3819.6464064868123, 3813.65039028447, 3807.684648080462, 3801.7489282731767, 3795.842982169983, 3789.9665639441732, 3784.1194305926897, 3778.3013418946034, 3772.5120603703413, 3766.7513512416385, 3761.0189823922037, 3755.3147243290846, 3749.6383501447094, 3743.989635479605, 3738.3683584857636, 3732.774299790656, 3727.207242461867, 3721.666971972351, 3716.1532761662884, 3710.665945225531, 3705.2047716366264, 3699.76955015841, 3694.360077790151, 3688.9761537402405, 3683.6175793954176, 3678.2841582905107, 3672.975696078698, 3667.6920005022575, 3662.4328813638285, 3657.1981504981354, 3651.9876217441947, 3646.8011109179793, 3641.6384357855427, 3636.499416036584, 3631.3838732584486, 3626.2916309105617, 3621.2225142992756, 3616.1763505531317, 3611.1529685985292, 3606.15219913578, 3601.1738746155625, 3596.2178292157487, 3591.2838988186113, 3586.3719209883893, 3581.4817349492205, 3576.613181563423, 3571.766103310123, 3566.9403442642238, 3562.135750075706, 3557.352167949256, 3552.5894466242153, 3547.8474363548466, 3543.1259888909017, 3538.4249574585037, 3533.7441967413197, 3529.083562862027, 3524.442913364068, 3519.8221071936846, 3515.2210046822343, 3510.6394675287693, 3506.0773587828917, 3501.5345428278642, 3497.0108853639804, 3492.5062533921887, 3488.0205151979594, 3483.553540335405, 3479.105199611628, 3474.6753650713135, 3470.2639099815465, 3465.8707088168608, 3461.4956372445054, 3457.138572109936, 3452.7993914225153, 3448.477974341429, 3444.17420116181, 3439.8879533010595, 3435.619113285381, 3431.3675647364976, 3427.1331923585735, 3422.915881925321, 3418.715520267296, 3414.5319952593745, 3410.3651958084142, 3406.2150118410923, 3402.0813342919146, 3397.964055091402, 3393.8630671544406, 3389.778264368801, 3385.70954158382, 3381.656794599241, 3377.619920154215, 3373.598815916454, 3369.593380471541, 3365.6035133123823, 3361.6291148288183, 3357.6700862973676, 3353.726329871124, 3349.7977485697866, 3345.884246269833, 3341.9857276948246, 3338.1020984058478, 3334.2332647920857, 3330.379134061519, 3326.539614231755, 3322.7146141209814, 3318.9040433390423, 3315.107812278636, 3311.3258321066332, 3307.5580147555115, 3303.804272914903, 3300.064520023261, 3296.338670259636, 3292.626638535555, 3288.928340487023, 3285.24369246662, 3281.5726115357047, 3277.9150154567274, 3274.2708226856366, 3270.639952364392, 3267.0223243135706, 3263.417859025077, 3259.8264776549427, 3256.2481020162195, 3252.6826545719723, 3249.130058428356, 3245.5902373277845, 3242.0631156421887, 3238.5486183663625, 3235.04667111139] //products#table//ssap#plainlocation//ssap#simpleCoverage name, label, ucd c2idx1, C2 feature at 5165Á, em.opt c2idx2, C2 feature at 4737Á, em.opt cnidx1, CN feature at 4216Á, em.opt cnidx3, CN feature at 3883Á, em.uv This naming convention was originally adopted in 1990 when the HES was conceived as a wide-angle quasar survey, following similar schemes of earlier quasar surveys in the 1980s. Later it turned out that HES spectra could be used for several other purposes, in particular for stellar work, made it clear that the concept was not appropriate as multiple HES sources can have the same HE name. For this reason an alternative HES identifier was retrospectively added, see entry "hes_id". As the ESO Schmidt plates were physically too large for the PDS scanner at Hamburg Observatory, they had to be scanned in four quarters with the following orientation: a refers to the South-Western (SW) quadrant of the scanned field, b to the SE, c to the NE, and d to the NW. For point-like objects ("stars") a PSF-weighted extraction was used with an extraction aperture equal to the typical PSF FWHM, approximately 1 arcsec. The spectra of extended sources were extracted with Gaussian weights based on the actual width of the object, but with an upper limit on the extraction aperture of 9.5 arcsec full width (+/-4.75 arcsec) around the centroid trace. Partly saturated ("bright") objects were extracted as unweighted sum over 12 arcsec (full width). For these objects the spectral values are unreliable because of the saturation and not even approximately proportional to fluxes. Absorption lines can however still be discerned in many spectra. In such cases the colour information of a HES spectrum is not to be trusted. Absorption or emission lines may still be traced correctly, depending on the nature of the overlapping source. Even for a flag value of 0, contamination by a faint object or an overlap at a wavelength shorter than 390.0 nm is still possible. The photographic B_J band approximately covers the wavelength range 395.0-540.0nm. The photometric calibration of DSS magnitudes in all HES fields is only an approximate one, often based on just a few reference stars. (This was done before calibrated all-sky data became available.) The calibration relation was obtained as a Chebychev polynomial fit, which by construction gives meaningful results only over a predefined magnitude interval, typically around B_J ~ 10 as bright and B_J ~ 20 as faint limit. Outside of these intervals, in particular for brighter objects, the "calibrated" magnitudes can take almost arbitrary values. This divergence behaviour of the Chebychev polynomials varies from field to field but is similar for all objects within one field, so that the resulting magnitude distributions of very bright stars will show artificial clustering in magnitude space. The conversion between B_J and Johnson B is based on the transformation B = B_J + 0.28 · (B − V), valid for main sequence stars in the colour range −0.1 < (B − V) < 1.6 (Hewett et al. 1995, 1995AJ....109.1498H). The 1σ uncertainty of BHES is typically around 0.2 mag (Christlieb et al. 2001, 2001A&A...366..898C)." make_view previews sequence: 1-9 hes_name: 11-22 hes_unique: 24-43 field: 45-49 plate: 51-55 quadrant: 57-57 objtype: 59-64 ra: 66-75 dec: 77-85 l: 87-94 b: 96-103 xpos: 105-114 ypos: 116-125 xspc: 127-138 yspc: 140-151 x_hpp1: 153-159 x_hpp2: 161-167 x_hpp3: 169-175 x_qd: 177-183 ovl: 185-190 bj_dss: 192-197 sn_bj: 199-204 hes_b: 206-209 hes_v: 211-214 hes_u: 216-219 BminVHES: 221-226 UminBHES: 228-233 strc1: 235-239 balmsum: 241-246 kphes: 248-253 gphes: 255-260 c2idx1: 262-267 c2idx2: 269-274 cnidx1: 276-281 cnidx3: 283-288 @accref = \inputRelativePath{False}[:-4]+"/"+str(int(@sequence)) yield row "\schema.meta" @accref 10000 "application/x-votable+xml" \fullDLURL{sdl}{@accref} \splitPreviewPath{.png} hmsToDeg(@ra) dmsToDeg(@dec) { "stars": 1/3600., "ext": 9/3600., "bright": 12/3600.}[@objtype] @ra @dec @aperture sdlssa_pubDID//ssap#view//obscore#publishSSAPMIXC HES spectrum//ssap#sdm-instanceHamburg-ESO objective prism spectrum.These spectra were extracted from objective prism spectra on the HES plates. For non-saturated sources, the flux column is roughly linear. For extended sources, the given aperture is an upper limit; actually, a Gaussian-weighted extraction based on the the actual FWHM with an upper limit of 9.5 arcsec was performed. For bright sources, extraction used the unweighted sum over 12 arcsec (full width). Because of the saturation, for these objects the spectral values are unreliable and not even approximately proportional to flux. Absorption lines may however still be traced correctly. accparts = urllib.parse.unquote( self.sourceToken["accref"].split('?', 1)[-1]).split("/") path = "/".join(accparts[:-1])+".fits" row = int(accparts[-1]) hdus = pyfits.open(base.getConfig("inputsDir") / path) row = hdus[0].data[row] hdus.close() for x, (spec, flux) in enumerate(zip(rd.lambdas, row)): yield {"x": 20*x-400, "spectral": spec, "flux": flux} \schema Datalink Service This service produces Hamburg-ESO spectra in a variety of formats. data "\rdId#data" "\rdId#build_spectrum" if descriptor.pubDID is None: return parts = descriptor.pubDID.split("?")[-1].split("/") row = parts[-1] yield descriptor.makeLinkFromFile( base.getConfig("inputsDir") / ("/".join(parts[:-1])+".fits"), description="The original FITS produced by Norbert Christlieb;" " this is a stack of spectra, and the current spectrum is" f" in row {row}.") \schema Web Hamburg/ESO Survey Browser Service if input and re.match(r"\d\d\d\d\d\d[pm]", input): # this is probably a naked HE identifier without a leading HE. return "HE"+input return input SDM Spectrum hes_name, hes_id, bj_dss, sn_bj, objtype, strc1 \schema SSAP Hamburg/ESO service SSAP full auto%delete this line if you have no previews; else delete just this.% ssa/ssap.xml row = self.getFirstVOTableRow() self.assertEqual(row["ssa_dstitle"], "HE 1250-1235") self.assertEqual(row["hes_id"], "HE125239m125148a9159") self.assertAlmostEqual(row["ra"], 193.16125) self.assertAlmostEqual(row['ssa_specend'], 4.3e-07) self.assertAlmostEqual(row['sn_bj'], 1.85) web/form # This will fail if DaCHS' preparse on inputKeys fails. self.assertHasStrings("193.1612500") sdl/dlmeta by_sem = self.datalinkBySemantics() self.assertTrue( by_sem["#progenitor"][0]["description"].endswith( "and the current spectrum is in row 185.")) self.assertEqual( by_sem["#progenitor"][0]["content_type"], "application/fits") self.assertTrue( by_sem["#this"][0]["access_url"].endswith( "getproduct/hamburg_eso/data/f718_p9159/185")) sdl/dlget self.assertXpath( "//v:PARAM[@utype='spec:Spectrum.Char.SpatialAxis.Coverage.Location.Value']", {"value": "193.16125000183936 -12.863055554902795"})