Alert Notice 418: Request for monitoring of V842 Cen in support of HST Observations
Note that the comparison stars currently in VSP do not cover the star in its current quiescent state. All observers -- but particularly visual observers -- should note that there is a red star with V band magnitude of approximately 14.9 about 7 arcseconds south-southwest of V842 Cen, and another red star of comparable brightness about 20 arcseconds south-southwest of the variable. These objects are currently being evaluated for suitability as formal comparison stars, but for now they may be used as references for "fainter-than" estimates. Please be certain that you do not confuse the star 7 arcseconds away with the variable, and if the two are severely blended, please be sure to note this in your observation.
The NOMAD1 ID, position, and magnitudes for the two potential comparison objects are:
7": 0323-0709135 , RA 14 35 52.170 , Dec -57 37 43.82 , V=14.88
20": 0323-0709110 , RA 14 35 51.839 , Dec -57 37 57.54 , V=14.76
If using either of these objects as "fainter-than" reference stars, please give the NOMAD ID in the Comparison star name field. Note that we may update the comparison star sequence, and will be sending out a follow-up Special Notice on or before March 16.
V842 Cen is located at the following (J2000) coordinates: RA: 14 35 52.58 , Dec: -57 37 35.1
Charts for V842 Cen may be plotted using AAVSO VSP: http://www.aavso.org/vsp
For more information on this campaign, please see AAVSO Alert Notice 417: http://www.aavso.org/aavso-alert-notice-417
Please report all observations of V842 Cen to the AAVSO using the name "V842 CEN".
This AAVSO Alert Notice was prepared by Matthew Templeton.
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
An Alert Notice archive is available at the following URL:
Subscribing and Unsubscribing may be done at the following URL: