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Observing Programs at Keck Observatory with ESI on Apr 24, 2015 for Williams, Prochaska, Furniss & Johnson

This page organizes all of the projects for ESI on Apr 24. Each program page should include: (i) the optimal setup for the observation; (ii) a target list with finder charts and recommended exposure times; (iii) any additional notes of interest (S/N desired, priority of targets); (iv) Worst conditions (seeing, clouds) under which observations will still be useful.

Goal

The goal of this program is to measure the redshift of TeV and candidate TeV blazars. With these measurements, we aim to address two main science goals: constraining the infrared extragalactic background light and understanding gamma-ray production in blazars.

Here is the current observing plan:

12 degree twilight begins at 09:22 LST (19:32 HST), and then begins at 18:59 LST (05:08 HST) in the morning.

Setup

Please use the 1.0" slit in echelle mode. Please obtain calibrations for the 1.0" slit at the beginning of the night.

Timeline (LST)

Sources with an asterisk (*) are TeV detected sources.

====== Apr 24 ======

9:30 - 9:33: Std: Feige34, 120 seconds, 60 seconds acquisition

9:33 - 9:56: *Mrk 180, 1200 seconds, 180 sec aquisition

9:56 - 10:19: *B2 1215+30, 1200 seconds, 180 sec aquisition

10:19 - 10:42: *PKS 1424+240, 1200 seconds, 180 sec aquisition

10:42 - 11:05: *PKS 1441+25, 1200 seconds, 180 sec aquisition

11:05 - 12:05: RGB J1448+361, 3300 seconds, 300 sec aquisition

12:05 - 12:23: *PG 1553+113, 900 seconds, 180 sec aquisition

12:23 - 12:26: Std: BD+33deg2642, 120 seconds, 60 seconds acquisition

12:26 - 12:59: H 1722+119, 1800 seconds, 180 sec acquisition

12:59 - 14:07: RGB J1756+553, 3800 seconds, 300 second acquisition (desired exposure is 5600, but our half night is done)

Target Specifics

R magnitudes are taken from the UCSC Blazar Monitoring Program (http://scipp.ucsc.edu/~afurniss/private/BlazarMonitoring/). There are two sources not in the monitoring program. The magnitudes are taken from NED.

Name

RA

DEC

Exposure

Rmag

Date

Finder

finder

Mrk 180

11 36 26.4

70 09 27.3

1200

14.4

56094.1

Mrk180_chart.jpg

pdf_finder

B2 1215+30

12 17 52.1

30 07 00.6

1200

14.5

57127.2

B2_1215_chart.jpg

pdf_finder

PKS 1424+240

14 27 00.4

23 48 00.0

1200

14.0

57127.3

PKS1424_chart.jpg

pdf_finder

RGB J1448+361

14 48 00.6

36 08 31.7

3300

16.3

11.1

NED

pdf_finder

PG 1553+113

15 55 43.0

11 11 24.4

900

13.8

57127.4

PG1553_chart.jpg

pdf_finder

H 1722+119

17 25 04.3

11 52 15.5

1800

15.3

57127.4

H1722_chart.gif

pdf_finder

RGB J1756+553

17 56 15.9

55 22 18.1

5600

17.1

11.1

NED

pdf_finder

B2 0912+29

09 15 52.4

29 33 24.0

1800

15.8

56064.1

B2_0912_chart.jpg

pdf_finder

PKS 1441+25

14 43 56.9

25 01 44.5

1200

16.0

57136

PKS_1441+25.pdf

Main Pages

Esi2015Apr24 (last edited 2015-04-25 03:35:33 by DavidWilliams)