Author Topic: We got observing time!  (Read 42683 times)

mitch

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Re: We got observing time!
« Reply #195 on: February 04, 2014, 03:53:05 am »
Great, thanks Bill.  8) 8) 8)
Did the AGN/galaxy pairs come from the thread or are they new ones?

NGC3314

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Re: We got observing time!
« Reply #196 on: February 04, 2014, 01:37:25 pm »
They came mostly from the thread. Since it takes 1-2 hours of telescope time to get a helpful spectrum for each, we worked out priority lists based on the proximity of the companion and the emission-line output of the AGN. There are a few likely instances of cross-ionization from data last year, and this time we hope to catch up with pairs posted up to now. If the humidity will drop, that is - one of the most frustrating experiences in taking data is a night where you can see the stars but the humidity is too high to safely open the telescope. We've lost the last two nights to humidity - maybe that means there's a bit of moisture to relieve the unusually dry California winter for somebody.

Edit: nice, Vardha got about 4 hours' worth of data overnight, now processing the files. At least one confirmed [O III] cloud from that.
« Last Edit: February 04, 2014, 02:05:22 pm by NGC3314 »

NGC3314

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Re: We got observing time!
« Reply #197 on: July 08, 2014, 02:35:43 pm »
We've been trying to get Hubble images of some of the Galaxy Zoo overlapping-galaxy pairs for about 5 years now. The program has finally borne fruit - this cycle, a program led by Benne Holwerda was approved. I attribute this in part to his clever formation of the acronym STARSMOG[1] for the project. Another selling point was selection of pairs already known to be at very different redshifts so they can't be interacting with each other and therefore possible distorted). The list of target galaxies so far looks like it will be roughly half Galaxy Zoo finds and half pairs selected from the GAMA redshift survey (these samples do, umm, overlap a good bit). This is a so-called snapshot program - projects using relatively brief observations, typically 30 minutes or less, which can be slotted in between longer ones to fill out gaps in the telescope schedule given it pointing constraints. So we are allowed to send a list of 150 potential targets with no actual guarantee which or how many will be observed; recent years' results suggest we'll get about 50 images.

The science goal is a set of dust-attenuation maps of the foreground spirals, looking only at pairs that have a smooth background system. Among other things, this will inform analysis of supernova luminosities and improve our zero point for the evolution of dust effects with cosmic time (with Hubble Zoo overlaps forming the rest of that effort).

Getting each new data set for this project will be, in the words of a famous (albeit fictional) resident of this state, like a box of chocolates. We never know what we'll get.

[1] STarlight Absorption Reduction through a Survey of Multiple Occulting Galaxies ("reduction" in the sense that the results will allow us to reduce the uncertainties due to this absorption)

djj

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Re: We got observing time!
« Reply #198 on: July 08, 2014, 03:27:32 pm »
Many thanks for this excellent news, Bill 8) 8) 8).

ElisabethB

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Re: We got observing time!
« Reply #199 on: July 08, 2014, 04:53:41 pm »
Woohoo ! Great news Bill !

Hanny

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Re: We got observing time!
« Reply #200 on: July 08, 2014, 05:02:59 pm »
Excellent, Bill! 8)

Infinity

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Re: We got observing time!
« Reply #201 on: July 08, 2014, 08:19:44 pm »
This is great news! 8)

mitch

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Re: We got observing time!
« Reply #202 on: July 09, 2014, 12:37:08 am »
Marvellous  8) 8)

elizabeth

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Re: We got observing time!
« Reply #203 on: July 09, 2014, 01:07:50 am »
 8) 8) 8) 8) 8) 8) ;D

Budgieye

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Re: We got observing time!
« Reply #204 on: July 09, 2014, 06:16:10 am »
Another Hubble experience!

c_cld

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Re: We got observing time!
« Reply #205 on: July 09, 2014, 06:41:33 am »
Great approval  8)

http://archive.stsci.edu/proposal_search.php?mission=hst&id=13695
GAMA-8" Number="1" ProvisionalCoordinates="11 42 12.8085 +00 37 58.65   1237648722302533803 175.55358, 0.63287
GAMA-10" Number="2" ProvisionalCoordinates="11 44 24.3981 +00 45 30.99 1237671129125945995 176.10397, 0.75771
GAMA-11" Number="3" ProvisionalCoordinates="11 48 8.5623 +00 40 12.33   1237648722303189250 177.03585, 0.66984
GAMA-25" Number="4" ProvisionalCoordinates="11 58 19.5573 +00 42 2.71   1237648722304303393 179.58146, 0.70074
GAMA-36" Number="5" ProvisionalCoordinates="12 10 3.6533 +00 49 16.57   1237648722305548747 182.51507, 0.82108

« Last Edit: July 09, 2014, 07:07:10 am by c_cld »