In late 2014, four images of Supernova (SN) "Refsdal," the first known
example of a strongly lensed SN with multiple resolved images, were detected in
the MACS J1149 galaxy-cluster field. Following the images' discovery, the SN
was predicted to reappear within hundreds of days at a new position ~8
arcseconds away in the field. The observed reappearance in late 2015 makes it
possible to carry out Refsdal's (1964) original proposal to use a multiply
imaged SN to measure the Hubble constant H0, since the time delay between
appearances should vary inversely with H0. Moreover, the position, brightness,
and timing of the reappearance enable a novel test of the blind predictions of
galaxy-cluster models, which are typically constrained only by the positions of
multiply imaged galaxies. We have developed a new photometry pipeline that uses
DOLPHOT to measure the fluxes of the five images of SN Refsdal from difference
images. We apply four separate techniques to perform a blind measurement of the
relative time delays and magnification ratios (mu_i/mu_1) between the last
image SX and the earlier images S1-S4. We measure the relative time delay of
SX-S1 to be 376.0+5.6-5.5 days and the relative magnification to be
0.30+0.05-0.03. This corresponds to a 1.5% precision on the time delay and 17%
precision for the magnification ratios, and includes uncertainties due to
millilensing and microlensing. In an accompanying paper, we place initial and
blind constraints on the value of the Hubble constant.
Beschreibung
The Magnificent Five Images of Supernova Refsdal: Time Delay and Magnification Measurements
%0 Generic
%1 kelly2023magnificent
%A Kelly, Patrick L.
%A Rodney, Steven
%A Treu, Tommaso
%A Birrer, Simon
%A Bonvin, Vivien
%A Dessart, Luc
%A Foley, Ryan J.
%A Filippenko, Alexei V.
%A Gilman, Daniel
%A Jha, Saurabh
%A Hjorth, Jens
%A Mandel, Kaisey
%A Millon, Martin
%A Pierel, Justin
%A Thorp, Stephen
%A Zitrin, Adi
%A Broadhurst, Tom
%A Chen, Wenlei
%A Diego, Jose M.
%A Dressler, Alan
%A Graur, Or
%A Jauzac, Mathilde
%A Malkan, Matthew A.
%A McCully, Curtis
%A Oguri, Masamune
%A Postman, Marc
%A Schmidt, Kasper Borello
%A Sharon, Keren
%A Tucker, Brad E.
%A von der Linden, Anja
%A Wambsganss, Joachim
%D 2023
%K tifr
%R 10.3847/1538-4357/ac4ccb
%T The Magnificent Five Images of Supernova Refsdal: Time Delay and
Magnification Measurements
%U http://arxiv.org/abs/2305.06377
%X In late 2014, four images of Supernova (SN) "Refsdal," the first known
example of a strongly lensed SN with multiple resolved images, were detected in
the MACS J1149 galaxy-cluster field. Following the images' discovery, the SN
was predicted to reappear within hundreds of days at a new position ~8
arcseconds away in the field. The observed reappearance in late 2015 makes it
possible to carry out Refsdal's (1964) original proposal to use a multiply
imaged SN to measure the Hubble constant H0, since the time delay between
appearances should vary inversely with H0. Moreover, the position, brightness,
and timing of the reappearance enable a novel test of the blind predictions of
galaxy-cluster models, which are typically constrained only by the positions of
multiply imaged galaxies. We have developed a new photometry pipeline that uses
DOLPHOT to measure the fluxes of the five images of SN Refsdal from difference
images. We apply four separate techniques to perform a blind measurement of the
relative time delays and magnification ratios (mu_i/mu_1) between the last
image SX and the earlier images S1-S4. We measure the relative time delay of
SX-S1 to be 376.0+5.6-5.5 days and the relative magnification to be
0.30+0.05-0.03. This corresponds to a 1.5% precision on the time delay and 17%
precision for the magnification ratios, and includes uncertainties due to
millilensing and microlensing. In an accompanying paper, we place initial and
blind constraints on the value of the Hubble constant.
@misc{kelly2023magnificent,
abstract = {In late 2014, four images of Supernova (SN) "Refsdal," the first known
example of a strongly lensed SN with multiple resolved images, were detected in
the MACS J1149 galaxy-cluster field. Following the images' discovery, the SN
was predicted to reappear within hundreds of days at a new position ~8
arcseconds away in the field. The observed reappearance in late 2015 makes it
possible to carry out Refsdal's (1964) original proposal to use a multiply
imaged SN to measure the Hubble constant H0, since the time delay between
appearances should vary inversely with H0. Moreover, the position, brightness,
and timing of the reappearance enable a novel test of the blind predictions of
galaxy-cluster models, which are typically constrained only by the positions of
multiply imaged galaxies. We have developed a new photometry pipeline that uses
DOLPHOT to measure the fluxes of the five images of SN Refsdal from difference
images. We apply four separate techniques to perform a blind measurement of the
relative time delays and magnification ratios (mu_i/mu_1) between the last
image SX and the earlier images S1-S4. We measure the relative time delay of
SX-S1 to be 376.0+5.6-5.5 days and the relative magnification to be
0.30+0.05-0.03. This corresponds to a 1.5% precision on the time delay and 17%
precision for the magnification ratios, and includes uncertainties due to
millilensing and microlensing. In an accompanying paper, we place initial and
blind constraints on the value of the Hubble constant.},
added-at = {2023-05-12T07:48:03.000+0200},
author = {Kelly, Patrick L. and Rodney, Steven and Treu, Tommaso and Birrer, Simon and Bonvin, Vivien and Dessart, Luc and Foley, Ryan J. and Filippenko, Alexei V. and Gilman, Daniel and Jha, Saurabh and Hjorth, Jens and Mandel, Kaisey and Millon, Martin and Pierel, Justin and Thorp, Stephen and Zitrin, Adi and Broadhurst, Tom and Chen, Wenlei and Diego, Jose M. and Dressler, Alan and Graur, Or and Jauzac, Mathilde and Malkan, Matthew A. and McCully, Curtis and Oguri, Masamune and Postman, Marc and Schmidt, Kasper Borello and Sharon, Keren and Tucker, Brad E. and von der Linden, Anja and Wambsganss, Joachim},
biburl = {https://www.bibsonomy.org/bibtex/26c5820c2a3dc8ad2e52baf0f0026940c/citekhatri},
description = {The Magnificent Five Images of Supernova Refsdal: Time Delay and Magnification Measurements},
doi = {10.3847/1538-4357/ac4ccb},
interhash = {9f81f486046be38da38f30ac564ef6a6},
intrahash = {6c5820c2a3dc8ad2e52baf0f0026940c},
keywords = {tifr},
note = {cite arxiv:2305.06377Comment: Published in ApJ. Companion paper presenting H0 constraints published in Science (DOI: 10.1126/science.abh1322)},
timestamp = {2023-05-12T07:48:03.000+0200},
title = {The Magnificent Five Images of Supernova Refsdal: Time Delay and
Magnification Measurements},
url = {http://arxiv.org/abs/2305.06377},
year = 2023
}