Correlated X-ray and near-IR flare emission from Sgr A*, the closest supermassive black hole, contains information about the hydrodynamics, energetics, and accretion behavior of matter within the innermost ten Schwarzschild radii of the hole. We propose HST/NICMOS observations of near-IR flares, in conjunction with already approved obsrevations using XMM-Newton (214 ksec) and CSO (3 nights), which can make the precise, new measurements necessary to understand the radiation mechanism and low luminosity of Sgr A*. HST/NICMOS is required due to its very low and stable background, and its stable, tightly focused PSF, which allow accurate measurement of fainter flares than can be observed using groundbased adaptive optics systems. We will measure the spectral index distribution, the time-averaged flux and duration of flares, and the statistics of flare activity, and will confirm previously reported quasi-periodic variability. These measurements will have far-reaching implications for testing the inverse Compton scattering (ICS) and synchrotron models of low-luminosity flares, for understanding the process of accretion onto and outflow from supermassive black holes, and for constraining the acceleration mechanism of flares and the inferred black hole spin. This knowledge, in turn, will help us understand more generally low-luminosity AGN and X-ray binaries in a very low/quiescent accretion state.

NICMOS camera 1 will be used to monitor the near-IR flux of the black hole at the Galactic Center, Sgr-A*, simultaneously with XMM observations scheduled in 2 30-hour long observing windows. Our total observing time allocation of 40 orbits will be evenly split into 20 orbits within each of the two XMM observing windows. We have constructed our visits to use a 4-position BOX dither pattern, obtaining 2 sets of F145M and F170M exposures at each dither position, and cycling through the complete pattern once in each visit, with one visit filling one orbit. We will therefore have a total of 20 visits (20 orbits) in each XMM observing time window, for a total of 40 visits (40 orbits). Each orbit will consist of 8 cycles of exposures in the F145M and F170M filters. This choice of filters provides with reasonable throughput in combination with adequate wavelength spacing to make spectral index measurements. We wish to have as many of the orbits scheduled contiguously as possible, in order to fully sample the time-dependent variability of Sgr-A* and to stay within the parallel XMM observing windows. Duplication of many existing archival NICMOS images of the Galactic Center is necessary because of the need to acquire new observations taken simultaneously with the other observatories that will be joining in this campaign. AGN/QUASARS 12 false 0.0 false false false false false false SUPPORTED STELLAR CLUSTER NUCLEUS 0.15 mJy in H-band GALACTIC-CENTER J2000 17 45 40.0300 -29 00 27.90 J2000 NIC1 Imaging No No F145M NIC1 Imaging No No F170M POS-TARG DITHER 0.635 LINE 0.635 false false 90 4 120 BOX 1 false Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the first 20 visits/orbits as possible should be scheduled within the first XMM observing window, which runs from 01-Apr-2007 14:06 through 02-Apr-2007 20:17 GMT. 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(Tic-Visit :proposal-id 10859 :visit-id "19" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "19" :obset-id "19" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "19" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the first 20 visits/orbits as possible should be scheduled within the first XMM observing window, which runs from 01-Apr-2007 14:06 through 02-Apr-2007 20:17 GMT. (Tic-Visit :proposal-id 10859 :visit-id "20" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:12.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "20" :obset-id "20" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "20" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "21" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:16.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "21" :obset-id "21" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "21" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "22" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "22" :obset-id "22" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "22" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "23" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "23" :obset-id "23" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "23" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "24" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:29.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "24" :obset-id "24" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "24" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "25" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:35.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "25" :obset-id "25" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "25" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "26" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "26" :obset-id "26" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "26" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "27" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "27" :obset-id "27" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "27" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "28" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:48.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "28" :obset-id "28" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "28" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "29" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:52.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "29" :obset-id "29" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "29" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "30" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:13:58.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "30" :obset-id "30" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "30" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "31" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "31" :obset-id "31" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "31" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "32" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "32" :obset-id "32" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "32" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "33" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:11.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "33" :obset-id "33" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "33" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "34" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "34" :obset-id "34" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "34" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "35" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "35" :obset-id "35" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "35" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "36" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "36" :obset-id "36" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "36" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "37" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:30.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "37" :obset-id "37" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "37" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "38" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "38" :obset-id "38" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "38" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "39" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:38.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "39" :obset-id "39" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "39" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Each visit consists of 1 complete cycle through the 4-position BOX dither pattern, obtaining two sets of F145M and F170M exposures at each of the 4 pattern positions. One visit fills one orbit. As many of the second 20 visits/orbits as possible should be scheduled within the second XMM observing window, which runs from 03-Apr-2007 13:58 through 04-Apr-2007 20:09 GMT. (Tic-Visit :proposal-id 10859 :visit-id "40" :proposal-version -1 :trans-version "20060322" :date "18-May-2006 14:14:44.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 212016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10859 :visit-id "40" :obset-id "40" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10859 :visit-id "40" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 72 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0