We propose NICMOS grism observations of 15 carefully selected stars with the immediate objective of establishing their Absolute Physical Flux (ABF), and an ultimate goal of achieving the sub-1% absolute photometric accuracies required by Dark Energy science with JWST and other facilities. Even with the best data available, the current determination of ABFs is plagued by the reliance on the Vega photometric system, which is known to be problematic primarily due to the fact that Vega is a pole-on rapid rotator with an infrared excess from its circumstellar disk! It will also be too bright for the use by the next generation of large aperture telescopes including JWST. In an effort to remedy these difficulties, teams from the National Institute of Standards (NIST), the University of New Mexico, Johns Hopkins University and STScI have begun to develop a catalog of stars that have spectral energy distributions that are tied directly to NIST (diode) standards with very precisely determined physical characteristics. A key element in this pursuit has been the efforts at STScI to measure the spectra of many of these objects with STIS. We now propose to extend this effort into the near-IR with NICMOS grism observations. NICMOS is crucial in order to extend the wavelength coverage to the K-band, which in turn enables the SEDs to be reliably extended, with high fidelity, to mid-IR data from Spitzer. Stars brighter than ~V=8 are observed using spatial scanning in both WFC3/IR grisms, in the +1st order. Stars brighter than V~5 mag are observed using spatial scanning, in both grisms, and POS TARGS are used to place the -1st orders in the center of the IR detector. This allows a slower scanning rate to be used. Stars fainter than V~9 mag are observed in the traditional stare mode, and are dithered spatially. The goal is to obtain very high signal to noise spectra in the near infrared, where SNR > 1000 per resolution element. In scanning mode, we image onto ~400 rows, in stare mode, dithers consisting of 8 to 16 separate pointings are used. Scanning rates greater than or equal to 1 arcsecond per second use the GYRO mode, andhave large (up to 30 seconds) errors in position, we take a dark frame with FGS pointing control to place the star at the desired position on the array and then start the scanning observations. Visits that use darks are VIsit 04 and Visit 14. in Aug 2012 changed the scan rates for visits 2,4,6, and 7 to avoid saturation. This also means changing the total exptime (NSAMP and SAMP_SEQ) to keep the scanned spectrum to about 100 rows. For the G141 grism the changes are: LTT 2351 To: 0.852713178 From 1.26 HD27836 To: 1.145833333 From 0.58 HD205905 To: 2.037037037 From < 1 HD116405 To: 0.173775671 From 0.07 For the G102 grism change the rate to: Visit7 LTT 2351 0.547263682 From 0.6 Visit6 HD27836 0.733333333 From 0.412 Visit4 HD205905 1.358024691 From 0.687 Visit2 HD116405 0.112820513 From 0.00888 COSMOLOGY 0 false false 0.0 0.0 false false false AVAILABLE STAR A0-A3 V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 STAR A0-A3 V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 STAR F0-F2 F3-F9 This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 STAR G V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 STAR G V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. G0V Proper motions are from SIMBAD HD106252 J2000 STAR G V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. Proper motions as in simbad G1V J2000 STAR G V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. HD37962 J2000 J=6.675, H=6.343, K=6.268 STAR A0-A3 V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 STAR G V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 STAR B3-B5 V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 STAR A0-A3 V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. 1757142 J2000 STAR A0-A3 V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. 1808347 J2000 STAR DA This object was generated by the targetselector and retrieved from the SIMBAD database. G191B2B J2000 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 NIC3 Spectroscopic No No G206 NIC3 Spectroscopic No No G141 NIC3 Spectroscopic No No G096 POS-TARG DITHER 2 LINE false false 3 90 WFC3-IR-DITHER-LINE-3PT 1 false POS-TARG DITHER 1 8 points, separated by 1 arcsec = 7.69 pixels in 45 degrees LINE false false 8 45 LINE 2 false POS-TARG DITHER 2 this line pattern has 6 points, spaced by 2 arcsec, and perpendicular to spectrum LINE false false 6 90 LINE 4 false POS-TARG DITHER 1 16 point line LINE false false 16 90 LINE 5 false POS-TARG DITHER 2 LINE false false 5 45 LINE 6 false The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1335092631000 79.04827615064409 (Tic-Visit :proposal-id 12685 :visit-id "01" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:32.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2721 :al-overhead-at-end 0 :internal-dur-at-end 595 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1353385094000 325.2726002565634 (Tic-Visit :proposal-id 12685 :visit-id "02" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:33.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1183824 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2210 :al-overhead-at-end 0 :internal-dur-at-end 291 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12685 :visit-id "04" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 678944 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 1738 :al-overhead-at-end 0 :internal-dur-at-end 177 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12685 :visit-id "05" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:40.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1497168 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2390 :al-overhead-at-end 0 :internal-dur-at-end 652 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1351676447000 293.3515062664485 (Tic-Visit :proposal-id 12685 :visit-id "06" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1288240 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2706 :al-overhead-at-end 0 :internal-dur-at-end 310 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1352458503000 322.4063596883474 (Tic-Visit :proposal-id 12685 :visit-id "07" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1340496 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2495 :al-overhead-at-end 0 :internal-dur-at-end 291 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1334758026000 113.74901595016132 (Tic-Visit :proposal-id 12685 :visit-id "09" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:47.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1671248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "09" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2511 :al-overhead-at-end 0 :internal-dur-at-end 690 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3244 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1334101915000 92.50246225703148 (Tic-Visit :proposal-id 12685 :visit-id "10" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1566800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "10" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2425 :al-overhead-at-end 0 :internal-dur-at-end 652 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3430 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1333064718000 260.0 (Tic-Visit :proposal-id 12685 :visit-id "81" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:51.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1974336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "81" :obset-id "81" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "81" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3255 :al-overhead-at-end 0 :internal-dur-at-end 479 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) false 1 1 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. need to have FOV oriented such that overlaping spectra are minimzed. on APT the ideal rotation angle is 30 deg. 1353469265000 32.95410992070819 (Tic-Visit :proposal-id 12685 :visit-id "82" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:53.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1932352 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "82" :obset-id "82" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "82" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2546 :al-overhead-at-end 0 :internal-dur-at-end 709 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. ideal oratio angle is 336 to avoid overlapping spectra from nearby stars 1358359798000 346.0 (Tic-Visit :proposal-id 12685 :visit-id "83" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:57.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 727072 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "83" :obset-id "83" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "83" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2728 :al-overhead-at-end 0 :internal-dur-at-end 230 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3511 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. ideal rotation angle is 192 deg to minimize spectra overlaps spectrum runs paraller to X direction dithers are in the Y direction (hopefully) 1353998176000 202.6162534706085 (Tic-Visit :proposal-id 12685 :visit-id "84" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:44:59.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1566832 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "84" :obset-id "84" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "84" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3050 :al-overhead-at-end 0 :internal-dur-at-end 253 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3430 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1333932355000 242.93661521016998 (Tic-Visit :proposal-id 12685 :visit-id "88" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:45:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 508944 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "88" :obset-id "88" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "88" :orbit-number 1 :pcs-time 333 :si-vis-utilization 1028 :al-overhead-at-end 0 :internal-dur-at-end 638 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3511 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. Repeat Visit01 HOPR 1349649266000 266.17754061192346 (Tic-Visit :proposal-id 12685 :visit-id "89" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:45:04.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 993072 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "89" :obset-id "89" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "89" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2840 :al-overhead-at-end 0 :internal-dur-at-end 605 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) false 1 0 revised version of original Visit 05 for LTT 13402 Should be using the +1st order with fast scans, not the -1st order. option to move the target by 15arcseconds to the west (i think) (Tic-Visit :proposal-id 12685 :visit-id "5B" :proposal-version -1 :trans-version "20121031" :date "19-Apr-2013 13:42:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1671232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12685 :visit-id "5B" :obset-id "5B" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12685 :visit-id "5B" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2846 :al-overhead-at-end 0 :internal-dur-at-end 386 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) false 1 0