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J/ApJ/797/24       Imaging observations of iPTF 13ajg         (Vreeswijk+, 2014)

The hydrogen-poor superluminous supernova iPTF 13ajg and its host galaxy in absorption and emission. Vreeswijk P.M., Savaglio S., Gal-Yam A., De Cia A., Quimby R.M., Sullivan M., Cenko S.B., Perley D.A., Filippenko A.V., Clubb K.I., Taddia F., Sollerman J., Leloudas G., Arcavi I., Rubin A., Kasliwal M.M., Cao Y., Yaron O., Tal D., Ofek E.O., Capone J., Kutyrev A.S., Toy V., Nugent P.E., Laher R., Surace J., Kulkarni S.R. <Astrophys. J., 797, 24 (2014)> =2014ApJ...797...24V (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, SDSS ; Photometry, UBVRI ; Photometry, infrared Keywords: ISM: atoms - supernovae: general - supernovae: individual: iPTF 13ajg Abstract: We present imaging and spectroscopy of a hydrogen-poor superluminous supernova (SLSN) discovered by the intermediate Palomar Transient Factory, iPTF 13ajg. At a redshift of z=0.7403, derived from narrow absorption lines, iPTF 13ajg peaked at an absolute magnitude of Mu,AB=-22.5, one of the most luminous supernovae to date. The observed bolometric peak luminosity of iPTF 13ajg is 3.2x1044 erg/s, while the estimated total radiated energy is 1.3x1051 erg. We detect narrow absorption lines of Mg I, Mg II, and Fe II, associated with the cold interstellar medium in the host galaxy, at two different epochs with X-shooter at the Very Large Telescope. From Voigt profile fitting, we derive the column densities log N(Mg I)=11.94±0.06, log N(Mg II)=14.7±0.3, and log N(Fe II)=14.25±0.10. These column densities, as well as the Mg I and Mg II equivalent widths of a sample of hydrogen-poor SLSNe taken from the literature, are at the low end of those derived for gamma-ray bursts (GRBs) whose progenitors are also thought to be massive stars. This suggests that the environments of hydrogen-poor SLSNe and GRBs are different. From the nondetection of Fe II fine-structure absorption lines, we derive a lower limit on the distance between the supernova and the narrow-line absorbing gas of 50 pc. The neutral gas responsible for the absorption in iPTF 13ajg exhibits a single narrow component with a low velocity width, ΔV=76 km/s, indicating a low-mass host galaxy. No host galaxy emission lines are detected, leading to an upper limit on the unobscured star formation rate (SFR) of SFR[OII]<0.07 M/yr. Late-time imaging shows the iPTF 13ajg host galaxy to be faint, with gAB∼27.0 and RAB≥26.0 mag, corresponding to MB,Vega≳-17.7 mag. Description: iPTF 13ajg was imaged with the Palomar 48 inch (P48) Oschin iPTF survey telescope equipped with a 12kx8k CCD mosaic camera (Rahmer et al. 2008SPIE.7014E..4YR) in the Mould R filter, the Palomar 60 inch and CCD camera (Cenko et al. 2006PASP..118.1396C) in Johnson B and Sloan Digital Sky Survey (SDSS) gri, the 2.56 m Nordic Optical Telescope (on La Palma, Canary Islands) with the Andalucia Faint Object Spectrograph and Camera (ALFOSC) in SDSS ugriz, the 4.3 m Discovery Channel Telescope (at Lowell Observatory, Arizona) with the Large Monolithic Imager (LMI) in SDSS r, and with LRIS (Oke et al. 1995PASP..107..375O) and the Multi-Object Spectrometer for Infrared Exploration (MOSFIRE; McLean et al. 2012SPIE.8446E..0JM), both mounted on the 10 m Keck-I telescope (on Mauna Kea, Hawaii), in g and Rs with LRIS and J and Ks with MOSFIRE. Objects: ----------------------------------------------------- RA (ICRS) DE Designation(s) ----------------------------------------------------- 16 39 03.95 +37 01 38.4 iPTF 13ajg = PTF 13ajg ----------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 67 141 Log of imaging observations of iPTF 13ajg
See also: II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009) II/313 : Palomar Transient Factory (PTF) photometric catalog 1.0 (Ofek+, 2012) J/MNRAS/448/1206 : Superluminous supernovae in faint galaxies (McCrum+, 2015) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 F9.3 d MJD Modified Julian Date 11- 17 F7.3 d Time Observed time relative to R band peak (1) 19- 25 F7.3 d Phase Phase 27- 38 A12 --- Tel Telescope identifier (2) 40- 46 A7 min Exp Exposure time 48- 50 A3 --- Filter Filter used (ugriz, B, R, Rs, J or Ks) 52- 54 F3.1 arcsec Seeing Seeing 56 A1 --- l_mag [>] Limit flag on mag 58- 62 F5.2 mag mag Magnitude in Filter (3) 64- 67 F4.2 mag e_mag ? Uncertainty in mag
Note (1): Where R band peak was JD=2456406.1. Note (2): Telescope as follows: P48 = Palomar 48-inch Oschin iPTF survey telescope; P60 = Palomar 60-inch telescope; NOT+ALFOSC = Nordic Optical Telescope+Andalucia Faint Object Spectrograph and Camera DCT+LMI = Discovery Channel Telescope+Large Monolithic Imager Keck+LRIS = Keck-I telescope+Low Resolution Imaging Spectrograph Keck+MOSFIRE = Keck-I telescope+Multi-Object Spectrometer for Infrared Exploration Note (3): The magnitudes have not been corrected for Galactic extinction.
History: From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 14-Aug-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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