We propose to obtain second epoch imaging of the deep Galactic bulge field observed using NICMOS by Zoccali et al. (2000). The bulge luminosity and mass function suffered from 30-50% contamination by foreground disk stars, which was impossible to correct for in the original study. Revisiting the field after 9 years, we propose to segregate the foregound disk stars because they have large transverse velocities, thus revealing the luminosity function of Galactic bulge low mass stars to near the hydrogen burning limit. The slope of the mass function has implications for galaxy formation and for understanding the nature of microlensing in the Galactic bulge.

This is second epoch imaging of a Galactic bulge field perviously observed with NICMOS. All 3 cameras are to be run, but only NIC1 and NIC 2 to provide data useful for proper motion measurement. The NIC2 is to be run in F110W and NIC2 in F160W. We aim to precisely reproduce the first epoch observations. RESOLVED STELLAR POPULATIONS 12 false 0.0 false false false false false false SUPPORTED STELLAR CLUSTER BULGE H=25 J2000 18 11 3.8000 +31 45 49.10 J2000 STELLAR CLUSTER BULGE H=25 J2000 18 11 3.8000 +31 45 49.10 J2000 STELLAR CLUSTER BULGE H=25 J2000 18 11 3.8000 +31 45 49.10 J2000 STELLAR CLUSTER BULGE H=25 J2000 18 11 3.8000 +31 45 49.10 J2000 STELLAR CLUSTER BULGE H=25 J2000 18 11 3.8000 +31 45 49.10 J2000 NIC2 Imaging No No F110W NIC1 Imaging No No F110W NIC3 Imaging No No F222M WFPC2 Imaging No F606W WFPC2 Imaging No F814W POS-TARG DITHER DITHER 0.4 NIC-XSTRIP-DITH false false 8 0 POS-TARG NIC-SPIRAL-DITH 0 1 false POS-TARG DITHER DITHER 0.4 NIC-XSTRIP-DITH false false 4 0 POS-TARG NIC-SPIRAL-DITH 0 2 false (Tic-Visit :proposal-id 11159 :visit-id "01" :proposal-version -1 :trans-version "20070325" :date "11-May-2007 08:53:49.0" :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 251760 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11159 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11159 :visit-id "01" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2730 :al-overhead-at-end 0 :internal-dur-at-end 118 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 1 0 (Tic-Visit :proposal-id 11159 :visit-id "02" :proposal-version -1 :trans-version "20070325" :date "11-May-2007 09:25:29.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 503536 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11159 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11159 :visit-id "02" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11159 :visit-id "02" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2728 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 (Tic-Visit :proposal-id 11159 :visit-id "03" :proposal-version -1 :trans-version "20070325" :date "11-May-2007 09:14:58.0" :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 251760 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11159 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11159 :visit-id "03" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2730 :al-overhead-at-end 0 :internal-dur-at-end 118 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 1 0 (Tic-Visit :proposal-id 11159 :visit-id "04" :proposal-version -1 :trans-version "20070325" :date "11-May-2007 09:07:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 503536 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11159 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11159 :visit-id "04" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11159 :visit-id "04" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2728 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 (Tic-Visit :proposal-id 11159 :visit-id "05" :proposal-version -1 :trans-version "20070325" :date "11-May-2007 09:08:12.0" :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 251760 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11159 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11159 :visit-id "05" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2730 :al-overhead-at-end 0 :internal-dur-at-end 118 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 1 0