J/ApJ/561/106 Gravitational lensing of SN 1997ff (Mortsell+, 2001)
Gravitational lensing of the farthest known supernova SN 1997ff.
Mortsell E., Gunnarsson C., Goobar A.
<Astrophys. J. 561, 106 (2001)>
=2001ApJ...561..106M 2001ApJ...561..106M
ADC_Keywords: Supernovae ; Gravitational lensing ; Redshifts
Keywords: galaxies: high-redshift - gravitational lensing -
supernovae: individual (SN 1997ff)
Abstract:
We investigate the effects of gravitational lensing due to intervening
galaxies on the recently discovered Type Ia supernova at z∼1.7,
SN 1997ff, in the Hubble Deep Field North. We find that it is possible
to obtain a wide range of magnifications by varying the mass and/or
the velocity dispersion normalization of the lensing galaxies. In
order to be able to use SN 1997ff to constrain the redshift-distance
relation, very detailed modeling of the galaxies to control the
systematic effects from lensing is necessary. Thus, we argue that,
based on our current limited knowledge of the lensing galaxies, it is
difficult to use SN 1997ff to constrain the values of ΩM and
Ω_Λ, or even to place severe limits on gray dust
obscuration or luminosity evolution of Type Ia supernovae.
Objects:
----------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------
12 36 44.1 +62 12 44 SN 1997ff = SN 1997ff
----------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 45 11 Data for galaxies in the HDF-N, closer than 10"
to the line of sight to SN 1997ff
hdfnpz.dat 94 1021 Photometric redshifts in the HDF North
hdfspz.dat 90 897 Photometric redshifts in the HDF South
refs.dat 66 9 References
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Gwyn Galaxy (Gwyn HDFN NNN in Simbad) number
5- 9 F5.3 --- z Redshift
10 A1 --- n_z [a] a: Photometric redshift used because
spectroscopic redshift is not available
13- 20 E8.3 --- m/m*(rST) Mass relative to the rST band mass value
23- 30 E8.3 --- m/m*(iST) Mass relative to the iST band mass value
33- 37 F5.3 --- v/v*(rST) Velocity dispersion relative to the
rST band velocity dispersion value
41- 45 F5.3 --- v/v*(iST) Velocity dispersion relative to the
iST band velocity dispersion value
--------------------------------------------------------------------------------
Byte-by-byte Description of file: hdfnpz.dat hdfspz.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 5 A4 --- Seq Sequential number (1)
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 18 F5.2 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21- 22 I2 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
27- 31 F5.2 arcsec DEs Declination (J2000)
33- 39 F7.2 pix Xpos X position
41- 47 F7.2 pix Ypos Y position
49- 54 F6.3 mag Umag UST magnitude (F300W)
56- 61 F6.3 mag Bmag BST magnitude (F450W)
63- 68 F6.3 mag Rmag RST magnitude (F606W)
70- 75 F6.3 mag Imag IST magnitude (F814W)
77- 81 F5.3 --- zph Photometric redshift
83- 88 F6.4 --- z Spectroscopic redshift
90- 94 A5 --- Ref Reference, in refs.dat file
--------------------------------------------------------------------------------
Note (1): No. 1 to 1015, s1 to s6 in the HDF-North
No. 1 to 886, s1 to s11 in the HDF-South
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference number
4- 22 A19 --- BIbCode BibCode
24- 44 A21 --- Aut Author's name
47- 66 A20 --- Com Comments
--------------------------------------------------------------------------------
History:
Copied at http://astrowww.phys.uvic.ca/grads/gwyn/pz/hdfn/spindex.html
(End) James Marcout, Patricia Bauer [CDS] 14-Jan-2002