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J/ApJ/851/L21  UV-NIR obs. compilation of GW170817 counterpart  (Villar+, 2017)

The combined ultraviolet, optical, and near-infrared light curves of the kilonova associated with the binary neutron star merger GW170817: unified data set, analytic models, and physical implications. Villar V.A., Guillochon J., Berger E., Metzger B.D., Cowperthwaite P.S., Nicholl M., Alexander K.D., Blanchard P.K., Chornock R., Eftekhari T., Fong W., Margutti R., Williams P.K.G. <Astrophys. J., 851, L21 (2017)> =2017ApJ...851L..21V
ADC_Keywords: Gravitational wave ; Photometry, ugriz ; Photometry, infrared ; Photometry, ultraviolet Keywords: catalogs ; gravitational waves ; stars: neutron Abstract: We present the first effort to aggregate, homogenize, and uniformly model the combined ultraviolet, optical, and near-infrared data set for the electromagnetic counterpart of the binary neutron star merger GW170817. By assembling all of the available data from 18 different papers and 46 different instruments, we are able to identify and mitigate systematic offsets between individual data sets and to identify clear outlying measurements, with the resulting pruned and adjusted data set offering an opportunity to expand the study of the kilonova. The unified data set includes 647 individual flux measurements, spanning 0.45-29.4d post-merger, and thus has greater constraining power for physical models than any single data set. We test a number of semi-analytical models and find that the data are well modeled with a three-component kilonova model: a "blue" lanthanide-poor component (κ=0.5cm2/g) with Mej∼0.020M and vej∼0.27c; an intermediate opacity "purple" component (κ=3cm2/g) with Mej∼0.047M and vej∼0.15c; and a "red" lanthanide-rich component (κ=10cm2/g) with Mej∼0.011M and vej∼0.14c. We further explore the possibility of ejecta asymmetry and its impact on the estimated parameters. From the inferred parameters we draw conclusions about the physical mechanisms responsible for the various ejecta components, the properties of the neutron stars, and, combined with an up-to-date merger rate, the implications for r-process enrichment via this channel. To facilitate future studies of this keystone event we make the unified data set and our modeling code public. Description: Following the public announcement of the discovery and observations of GW170817, we aggregated the UV, Optical, NIR photometry available in the literature. The data span from 0.45 days to 29.4 days post-merger and were collected with 46 instruments in 37 unique filters. See section 2 for the details. Objects: ---------------------------------------------------- RA (ICRS) DE Designation(s) ---------------------------------------------------- 13 09 48.09 -23 22 53.3 GW 170817 = GrW 170817 ---------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 96 737 Photometric data
See also: J/ApJ/848/L16 : Counterpart of GW170817. I. DECam obs. (Soares-Santos+, 2017) J/ApJ/848/L29 : Opt. follow-up of GW170817 counterpart (Diaz+, 2017) J/ApJ/848/L33 : Opt. follow-up of GW events with LCO (Arcavi+, 2017) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 9 F9.3 d MJD [57982.9/58012] MJD of observation (JD-2400000.5) 11- 16 F6.3 d Phase [0.4/29.5] Phase of observation relative to 57982.529 18- 28 A11 --- Inst Instrument name 30- 40 A11 --- Tel Telescope name (1) 42- 46 A5 --- Band Filter/Band name 48 A1 --- l_mag Upper limit flag 50- 54 F5.2 mag mag [7.4/27] New AB magnitude value used in modeling 56- 60 F5.2 mag e_mag [0.01/0.7]? Reported error 62- 66 F5.2 mag Delta [-1.5/0] Difference between new and original value 68- 86 A19 --- Ref Reference, ADS bibcode (2) 88 A1 --- Use [*] Used in model (3) 90 A1 --- Avg [A] Averaged point (3) 92 A1 --- Rt [R] Repeated observation (3) 94 A1 --- Out [O] Outlier (3) 96 A1 --- Exc [X] Excluded from model (3)
Note (1): Telescope as follows: Gemini-S = 8.1-meter diameter Gemini South telescope on the summit of Cerro Pachon in Chile with GMOS or FLAMINGOS-2 from Troja+ (2017Natur.551...71T), Kasliwal+ (2017Sci...358.1559K) and Cowperthwaite+ (2017ApJ...848L..17C) (90 occurrences) LCO1m = Las Cumbres Observatory (LCO) 1-meter autonomous telescope with Sinistro from Arcavi+ 2017Natur.551...64A (58 occurrences) VLT = Very Large Telescope (VLT) with FORS2, HAWKI, VIMOS, VISIR, X-Shooter or FORS from Kasliwal+ (2017Sci...358.1559K), Pian+ (2017Natur.551...67P), Tanvir+ (2017ApJ...848L..27T) and Andreoni+ (2017PASA...34...69A) (51 occurrences) T80S = the T80-South telescope (0.80m) located at CTIO, Cerro Tololo, Chile, with the T80Cam gri filters from Diaz+ (2017ApJ...848L..29D) (48 occurrences) Blanco/CTIO = the Victor Blanco 4m Telescope with DECam from Cowperthwaite+ (2017ApJ...848L..17C) (48 occurrences) LaSilla = The MPG/ESO 2.2m Telescope at La Silla with GROND from Smartt+ (2017Natur.551...75S) (47 occurrences) Magellan = Magellan I 6.5m Baade Telescope with IMACS and FourStar and Magellan II Telescope with LDSS from Shappee+ (2017Sci...358.1574S) and Drout+ (2017Sci...358.1570D) (45 occurrences) HST = Hubble Space Telescope with WFC3/UVIS, WFC3/IR and ACS/WFC from Tanvir+ (2017ApJ...848L..27T), Troja+ (2017Natur.551...71T), Kasliwal+ (2017Sci...358.1559K) and Cowperthwaite+ (2017ApJ...848L..17C) (44 occurrences) IRSF = The IR Survey Facility (IRSF) 1.4m Telescope with SIRIUS at the South African Astronomical Observatory from Utsumi+ (2017PASJ...69..101U) and Kasliwal+ (2017Sci...358.1559K) (38 occurrences) VISTA = The 4m Visible and Infrared Survey Telescope for Astronomy (VISTA) with VIRCAM from Tanvir+ (2017ApJ...848L..27T) (34 occurrences) NTT = The 3.58m New Technology Telescope with SOFI, EFOSC2 from Smartt+ (2017Natur.551...75S) and Drout+ (2017Sci...358.1570D) (33 occurrences) Swift = Swift with the Ultraviolet/Optical Telescope (UVOT) from Evans+ (2017Sci...358.1565E) (32 occurrences) Skymapper = The 1.35-m telescope SkyMapper located at Siding Spring Observatory from Andreoni+ (2017PASA...34...69A)(21 occurrences) Pan-STARRS = 1.8m Panoramic Survey Telescope and Rapid Response System (Pan-STARRS1) with GPC from Smartt+ (2017Natur.551...75S) (17 occurrences) Swope = the Swope Telescope at Las Campanas Observatory in Chile with the E2V 4kx4k CCD camera from Coulter+ (2017Sci...358.1556C) (16 occurrences) KMTNet-SAAO = Korea Microlensing Telescope Network (KMTNet) 1.6-m telescope at the South African Astronomical Observatory in South Africa, the Siding Spring Observatory in Australia, and the Cerro-Tololo Inter-American Observatory in Chile from Troja+ (2017Natur.551...71T) (16 occurrences) KMTNet-SSO = Korea Microlensing Telescope Network (KMTNet) 1.6-m telescope at the Siding Spring Observatory in Australia from Troja+ (2017Natur.551...71T) (13 occurrences) KMTNet/CTIO = Korea Microlensing Telescope Network (KMTNet) 1.6-m telescope at the Cerro-Tololo Inter-American Observatory in Chile from Troja+ (2017Natur.551...71T) (12 occurrences) SAAO = South African Astronomical Observatory (SAAO) MASTER Global Robotic Net telescopes from Lipunov+ (2017ApJ...850L...1L) (12 occurrences) Prompt5 = PROMPT-5 0.4m telescope located at Cerro Tololo Inter-American Observatory (CTIO) with T80Cam and AltaU47+ from Valenti+ (2017ApJ...848L..24V) (11 occurrences) REM = the Rapid Eye Mount (REM) 60-cm robotic telescope located at the ESO La Silla Observatory with ROS2 from Pian+ (2017Natur.551...67P) (10 occurrences) Subaru = The Subaru 8.2m telescope located in Mauna Kea, Hawaii, with HSC or MOIRCS from Utsumi+ (2017PASJ...69..101U) (5 occurrences) AST3-2 = the second telescope of the Antarctic Survey Telescopes (AST) at Dome A, Antarctica with the 10kx10k CCD camera from Hu+ (2017SciBu..62.1433H) (5 occurrences) 1.3m/CTIO = the SMARTS 1.3m telescope at Cerro Tololo Inter-American Observatory (CTIO) with ANDICAM from Kasliwal+ (2017Sci...358.1559K) (5 occurrences) zadko = the 1-m Zadko telescope in Western Australia from Andreoni+ (2017PASA...34...69A) (4 occurrences) RC-1000 = the 1-m Ritchey-Chretien telescope (RC-1000) of the Chilescope observatory with the 4kx4k CCD camera from Pozanenko+ (2017, arXiv:1710.05448) (4 occurrences) OAFA = Observatorio Astronomico Felix Aguilar (OAFA) MASTER Global Robotic Net telescopes from Lipunov+ (2017ApJ...850L...1L) (4 occurrences) VST = the 2.6-m ESO VLT Survey Telescope (VST) with OmegaCam from Pian+ (2017Natur.551...67P) (3 occurrences) B&C = the 61cm Boller & Chivens telescope (B&C) with Tripol5 at the Mt. John Observatory in New Zealand from Utsumi+ (2017PASJ...69..101U) (3 occurrences) Keck-I = the 10-m Keck I telescope with LRIS from Drout+ (2017Sci...358.1570D) (2 occurrences) 1.5B = the 1.5B telescope from Smartt+ (2017Natur.551...75S) (2 occurrences) VIRT = the 0.5m Virgin Islands Robotic Telescope located at the Etelman Observatory in the U. S. Virgin Island with the 1kx2k CCD camera from Andreoni+ (2017PASA...34...69A) (1 occurrence) Palomar5m = The 200-inch (5.1m) Hale Telescope at Palomar Observatory with WIRC from Kasliwal+ (2017Sci...358.1559K) (1 occurrence) DK1.5 = the Danish 1.5m Telescope (DK1.5) from Tanvir+ (2017ApJ...848L..27T) (1 occurrence) APO = the ARC 3.5m telescope at the Apache Point Observatory with NICFPS from Kasliwal+ (2017Sci...358.1559K) (1 occurrence) Note (2): We request that any use of the data in this table includes appropriate citation to the original papers, as well as to our compilation: this paper = this paper (Villar et al. 2017ApJ...851L..21V), 2017arXiv171005452C = Coulter et al. (2017); 2017arXiv171005846A = Andreoni et al. (2017); 2017Natur.551...64A = Arcavi et al. (2017); 2017ApJ...848L..17C = Cowperthwaite et al. (2017); 2017ApJ...848L..29D = Diaz et al. (2017); 2017arXiv171005443D = Drout et al. (2017); 2017arXiv171005437E = Evans et al. (2017); 2017arXiv171005462H = Hu et al. (2017); 2017arXiv171005436K = Kasliwal et al. (2017); 2017ApJ...850L...1L = Lipunov et al. (2017); 2017Natur.551...67P = Pian et al. (2017); 2017arXiv171005448P = Pozanenko et al. (2017); 2017Natur.551...75S = Smartt et al. (2017); 2017ApJ...848L..27T = Tanvir et al. (2017); 2017Natur.551...71T = Troja et al. (2017); 2017arXiv171005848U = Utsumi et al. (2017); 2017ApJ...848L..24V = Valenti et al. (2017); Note (3): Flag as follows: X = Photometry is not included in our model fit, O = photometry has been visually flagged as an outlier, R = photometry reported in multiple sources with unique reduction routines A = photometry generated by averaging repeated photometry * = photometry used in modeling
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Jul-2018
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