0 Assigned ID: 388 ----- Attempting Submission 1 (Fri Apr 11 07:37:00 GMT 2014) ----- Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. 0 ----- Attempting Submission 1 (Thu Jul 17 21:52:41 GMT 2014) ----- HST Phase II Proposal 13759 (phaseIIv1.apt) successfully submitted. ----- Attempting Submission 2 (Wed Jul 23 15:15:16 GMT 2014) ----- Target has been observed with HST in the past; current observations are built using archival data not the ETC Extreme Variability in the M87 Jet The M87 jet is experiencing extreme optical/UV variability and very high energy emission that were never anticipated. HST-1, a knot along the M87 jet located at ~0.85" from the nucleus, has experienced unusual and repeated flaring at all wavelengths during the last decade: exceptional brightness variability for an individual component of an AGN jet. Hubble Space Telescope observations revealed that the NUV intensity of HST-1 increased by a factor of 100 between 1999 and 2005. Equivalent variability was recorded by Chandra, and the VLA. This is an unprecedented event that has only been observed in the M87 jet and has serious implications for models of jet variability and unified schemes of AGNs. Similarly, all three major Cherenkov observatories studying very high energy gamma-rays reported flaring of M87 in the very high energy regime in 2005, 2008, and 2010. This proposal aims at obtaining a single orbit image of the M87 jet with STIS to determine the evolution of the rapidly changing M87 jet during Cycle 22. This new image will be an important addition to the dataset of HST observations of M87 in the optical and near ultraviolet spaning more than 20 years. A single observation of the M87 jet in 2015 will also make a substantial contribution to the interpretation of M87 observations built by Chandra. With these observations we aim to: study the physical origin of the flare, find new and longer periodicities for this event, and measure the impact of such an energetic burst on the outflow of an AGN jet. We will also follow the emergence of new knot along the M87 jet, unrelated to HST-1, and present during the last years of STIS observations. We will obtain near ultraviolet imaging of the M87 jet with the Space Telescope Imaging Spectrograph. We will use the NUV/MAMA with the F25QTZ longpass filter. The observations we propose have the same configuration as STIS archival data in order to build a homogenous database. We made no formal coordination request but on a best effort basis HST and Chandra observations can be scheduled within a few days of each other. We have a recently approved Chandra program with one observation scheduled in December 2014; another in March 2015. The observation window for December 2014 (13 DEC 2014 to 18 DEC 2014) is the preferred one. AGN/QUASARS 12 Regular false false false false false SUPPORTED GALAXY JET This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STIS/NUV-MAMA Imaging No No F25QTZ The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. Exposure times based on archival data. 1421232892000 280.0 (Tic-Visit :proposal-id 13759 :visit-id "01" :proposal-version -1 :trans-version "20140605" :date "23-Jul-2014 10:58:56.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 278320 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13759 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13759 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2873 :al-overhead-at-end 0 :internal-dur-at-end 450 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3226 :pcs-gap 0 ) false 1 0 /private/var/folders/q_/glfmvhmj0mq4qm_yvhs134lh0003lp/T/OPVisit9113735243229536013.xml Exposure times based on archival data. (Tic-Visit :proposal-id 13759 :visit-id "51" :proposal-version -1 :trans-version "20150128" :date "29-Apr-2015 08:38:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 278320 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13759 :visit-id "51" :obset-id "51" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13759 :visit-id "51" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2873 :al-overhead-at-end 0 :internal-dur-at-end 450 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3226 :pcs-gap 0 ) false 1 0