Jun 112016
 

We are pleased to announce new v0.5 HST mosaics for Epoch 2 of the cluster Abell S1063, completing the 70 orbits of observations from Epoch 2 of our Frontier Fields program (14037, PI.: J. Lotz), adding 22 orbits with WFC3/IR on the main cluster, and with ACS on the parallel field, in addition to existing public archival ACS and WFC3/IR imaging obtained in these filters from programs 12458 (PI.: M. Postman) and 13459 (PI.: T. Treu). The products released here are the most complete full-depth mosaics in these filters, where all data have been fully reprocessed using the most current calibration files, to produce the best possible quality, science-ready full-depth mosaics. For ACS, these mosaics incorporate CTE correction and bias destriping, as well as a set of mosaics that have been processed with the new selfcal approach to better correct for low-level dark current structure. The WFC3/IR mosaics have been masked for persistence and bad pixels, and in addition include a set of mosaics that have been corrected for time-variable sky emission that can occur during the orbit and can otherwise impact the up-the-ramp count-rate fitting if not properly corrected. All these mosaics are aligned to a common pixel grid as well as to an absolute astrometric frame based on pre-existing catalogs of this field. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following location:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 5:02 pm
Apr 102016
 

We are pleased to announce the Version 1.0 release of Epoch 1 of Abell 370, after the completion of all the ACS and WFC3/IR imaging for this epoch on the main cluster and parallel field from our Frontier Fields program (14038, PI: J. Lotz). These mosaics complete the full depth of Epoch 1 obtained with ACS F435W, F606W and F814W on the main cluster, along with WFC3/IR F105W, F125W, F140W and F160W on the parallel field, and also include public archival ACS and WFC3/IR imaging obtained in these filters from programs 11108 (PI.: E. Hu), 11507 (PI.: K. Noll), 11591 (PI.: J.-P. Kneib), 13459 (PI.: T. Treu), 13790 (PI.: S. Rodney), and 14216 (PI.: R. Kirshner). All the mosaics in this v1.0 release have been fully recalibrated relative to the v0.5 mosaics that we released during this epoch. For ACS, the v1.0 mosaics incorporate new bias and dark current reference files, along with CTE correction and bias destriping, and also include a set of mosaics that have been processed with the new selfcal approach to better account for the low-level dark current structure. The WFC3/IR v1.0 mosaics have improved masking for persistence and bad pixels, and in addition include a set of mosaics that have been corrected for time-variable sky emission that can occur during the orbit and can otherwise impact the up-the-ramp count-rate fitting if not properly corrected. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following location:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 12:33 pm
Mar 252016
 

We are pleased to announce the Version 1.0 release of Epoch 1 of Abell S1063, after the completion of all the ACS and WFC3/IR imaging on the main cluster and parallel field from our Frontier Fields program (14037, PI: J. Lotz). These mosaics complete the full depth of Epoch 1 obtained with ACS F435W, F606W and F814W on the main cluster, along with WFC3/IR F105W, F125W, F140W and F160W on the parallel field, including also all the public archival ACS and WFC3/IR imaging obtained in these filters from programs 12458 (PI.: M. Postman) and 13459 (PI.:T. Treu). All the mosaics in this v1.0 release have been fully recalibrated relative to the v0.5 mosaics that we released during this epoch. For ACS, the v1.0 mosaics incorporate new bias and dark current reference files, along with CTE correction and bias destriping, and also include a set of mosaics that have been processed with the new selfcal approach to better account for the low-level dark current structure. The WFC3/IR v1.0 mosaics have improved masking for persistence and bad pixels, and in addition include a set of mosaics that have been corrected for time-variable sky emission that can occur during the orbit and can otherwise impact the up-the-ramp count-rate fitting if not properly corrected. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following location:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 12:11 pm
Jan 212016
 

We are pleased to announce the v0.5 release of the new HST mosaics obtained for epoch 1 on the cluster Abell 370, from the first 46 orbits of observations of this target from our ongoing Frontier Fields program ID 14038 (PI: J. Lotz), also including public archival ACS and WFC3/IR imaging data from programs 11108 (PI: E. Hu), 11507 (PI: K. Noll), 11591 (PI: J.-P. Kneib), and 13459 (PI: T. Treu). These have all been combined to provide the most complete full-depth mosaics in the ACS/WFC and WFC3/IR filters that are used for the Frontier Fields program, where all data have been fully reprocessed using the most current calibration files. These mosaics have all been processed beyond the default pipeline calibration, in order to produce the best possible quality, science-ready full-depth mosaics. For ACS, these mosaics incorporate CTE correction and bias destriping, as well as a set of mosaics that have been processed with the new selfcal approach to better correct for low-level dark current structure. The WFC3/IR mosaics have been masked for persistence and bad pixels, and in addition include a set of mosaics that have been corrected for time-variable sky emission that can occur during the orbit and can otherwise impact the up-the-ramp count-rate fitting if not properly corrected. All these mosaics are aligned to a common pixel grid as well as to an absolute astrometric frame based on pre-existing catalogs of this field. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following link:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 5:43 pm
Nov 282015
 

We are pleased to announce the v0.5 release of the new HST mosaics obtained for epoch 1 on the cluster Abell S1063, from the first 50 orbits of observations of this target from our Frontier Fields program ID 14037 (PI: J. Lotz), which also includes archival ACS and WFC3/IR data (programs 12458, PI.: M. Postman, and and program 13459, PI.: T. Treu), to provide the most complete full-depth mosaics in the ACS/WFC and WFC3/IR filters that are used for the Frontier Fields program, where all data have been fully reprocessed using the most current calibration files. These mosaics have all been processed beyond the default pipeline calibration, in order to produce the best possible quality, science-ready full-depth mosaics. For ACS, these mosaics incorporate CTE correction and bias destriping, as well as a set of mosaics that have been processed with the new selfcal approach to better correct for low-level dark current structure. The WFC3/IR mosaics have been masked for persistence and bad pixels, and in addition include a set of mosaics that have been corrected for time-variable sky emission that can occur during the orbit and can otherwise impact the up-the-ramp count-rate fitting if not properly corrected. All these mosaics are aligned to a common pixel grid as well as to an absolute astrometric frame based on pre-existing catalogs of this field. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following link:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 7:24 pm
Mar 242015
 

We are pleased to announce the first new v0.5 HST mosaics for Epoch 2 of the cluster MACSJ0717.5+3745, from the observations of this target from our Frontier Fields program ID 13498 (PI: J. Lotz). In this second epoch, the orientation of HST enables the instruments to be swapped, in order to obtain WFC3/IR imaging on the main cluster field and ACS imaging on the parallel field, with a total of 28 orbits so far that have been obtained from this program during this epoch. We have combined these data with archival data from programs 12103 (PI: M. Postman), 13389 (PI: B. Siana), and 13459 (PI.: T. Treu), to create mosaics that are intended to contain the full depth of WFC3/IR data on the main cluster and ACS data on the parallel field. These mosaics have all been processed beyond the default pipeline calibration, including correction for time-variable background and persistence effects in WFC3/IR, as well as self-calibration processing for ACS, and astrometric alignment to the previous mosaics that have already been constructed for this cluster. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following location:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 8:47 am
Feb 022015
 

We are pleased to announce the Version 1.0 release of Epoch 1 of MACSJ1149.5+2223, after the completion of the first 70 orbits of ACS and WFC3/IR imaging on this cluster and its parallel field from our Frontier Fields program ID 13504 (PI: J. Lotz). These v1.0 mosaics have been fully recalibrated relative to the v0.5 mosaics that we have released during the course of this epoch from November 2014 to January 2015. For ACS, the v1.0 mosaics incorporate new bias and dark current reference files, along with CTE correction and bias destriping, and also include a set of mosaics that have been processed with the new selfcal approach to better account for the low level dark current structure. The WFC3/IR v1.0 mosaics have improved masking for persistence and bad pixels, and in addition include a set of mosaics that have been corrected for time-variable sky emission that can occur during the orbit and can otherwise impact the up-the-ramp count-rate fitting if not properly corrected. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following location:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 10:19 pm
Jan 102015
 

We are pleased to announce new v0.5 HST mosaics for the cluster MACSJ1149.5+2223, from the observations of this target from our Frontier Fields program ID 13504 (PI: J. Lotz). The observations for this epoch are now complete at a total of 70 orbits, which we have combined into mosaics on the main cluster field observed with WFC3/IR (F105W, F125W, F140W, F160W) and on the parallel field with ACS (F435W, F606W, F814W). We note that these v0.5 mosaics do not yet include older archival data from CLASH or from other programs; this is to help facilitate study of transient phenomena, for which the data from our program 13504 can be compared with other datasets. All other archival data will be combined together with the Frontier Fields data when we release the full-depth v1.0 mosaics. The current v0.5 mosaics have all been processed beyond the default pipeline calibration. For ACS, these mosaics incorporate CTE correction and bias destriping, while the WFC3/IR mosaics have been masked for persistence, bad pixels, and other detector defects, and also include a set that have been corrected for time-variable background emission in the IR. All the mosaics are aligned to a common pixel grid, as well as to an absolute astrometric frame based on pre-existing catalogs of this field. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following link:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 2:32 pm
Jan 102015
 

We are pleased to announce the Version 1.0 release of Epoch 1 of MACSJ0717.5+3745, after the completion of the first 70 orbits of ACS and WFC3/IR imaging on this cluster and its parallel field from our Frontier Fields program ID 13498 (PI: J. Lotz). These full-depth v1.0 mosaics also include archival ACS and WFC3/IR data in the Frontier Fields filter set, from programs 9722 and 10420 (PI: H. Ebeling), programs 10493 and 10793 (PI: A. Gal-Yam), program 12103 (PI: M. Postman), program 13389 (PI: B.Siana), and program 13459 (PI: T. Treu). These v1.0 mosaics have been fully recalibrated relative to the v0.5 mosaics that we have released during the course of this epoch in October and November 2014. For ACS, the v1.0 mosaics incorporate new bias and dark current reference files, along with CTE correction and bias destriping, and also include a set of mosaics that have been processed with the new selfcal approach to better account for the low-level dark current structure. The WFC3/IR v1.0 mosaics have improved masking for persistence and bad pixels, and in addition include a set of mosaics that have been corrected for time-variable sky emission that can occur during the orbit and can otherwise impact the up-the-ramp count-rate fitting if not properly corrected. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following location:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 2:30 pm
Sep 242014
 

We are pleased to announce the Version 1.0 release of Epoch 2 of MACSJ0416.1-2403 after the completion of all the ACS and WFC3/IR imaging on the main cluster and parallel field from our Frontier Fields program
(13496, PI: J. Lotz). These v1.0 mosaics have been fully recalibrated relative to the v0.5 mosaics that we released regularly throughout the course of this epoch during August and September 2014. For ACS, the v1.0 mosaics incorporate new bias and dark current reference files, along with bias destriping and correction for CTE losses, and also include a set of mosaics that have been processed with the new selfcal approach to better correct for low-level dark current structure. The WFC3/IR v1.0 mosaics have improved masking for persistence and bad pixels, and in addition include a set of mosaics that have been corrected for time-variable sky emission that can occur during the orbit and can otherwise impact the up-the-ramp count-rate fitting if not properly corrected. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following location:

More general information about the data for this project can be obtained from our Frontier Fields MAST archive website:

as well as our main Frontier Fields HST project website:

and our Frontier Fields astronomer’s blog and other social media:

We hope that these high-level science products are useful for your research, and we welcome any suggestions or questions that you may have about them.

 Posted by at 2:52 pm