Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging
— University of Arizona Skip to main navigation Skip to search Skip to main content University of Arizona Home Home Profiles Departments and Centers Scholarly Works Activities Grants Datasets Prizes Search by expertise, name or affiliation Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging Karl D. Gordon, Charles W. Engelbracht, Dario Fadda, John Stansberry, Stefanie Wachter, Dave T. Frayer, George Rieke, Alberto Noriega-Crespo, William B. Latter, Erick Young, Gerry Neugebauer, Zoltan Balog, Jeffrey W. Beeman, Hervé Dole, Eiichi Egami, Eugene E. Haller, Dean Hines, Doug Kelly, Francine Marleau, Karl MisseltShow 4 othersShow lessJane Morrison, Pablo Pérez-González, Jeonghee Rho, Wm A. Wheaton Steward Observatory Lunar and Planetary Lab Planetary Sciences Research output: Contribution to journal › Article › peer-review 169 Scopus citations Overview Fingerprint Abstract The absolute calibration and characterization of the Multiband Imaging Photometer for Spitzer (MIPS) 70 μm coarse- and fine-scale imaging modes are presented based on over 2.5 yr of observations. Accurate photometry (especially for faint sources) requires two simple processing steps beyond the standard data reduction to remove long-term detector transients. Point-spread function (PSF) fitting photometry is found to give more accurate flux densities than aperture photometry. Based on the PSF fitting photometry, the calibration factor shows no strong trend with flux density, background, spectral type, exposure time, or time since anneals. The coarse-scale calibration sample includes observations of stars with flux densities from 22 mJy to 17 Jy, on backgrounds from 4 to 26 MJy sr -1, and with spectral types from B to M. The coarse-scale calibration is 702 ± 35 MJy sr -1 MIPS70 -1 (5% uncertainty) and is based on measurements of 66 stars. The instrumental units of the MIPS 70 μm coarse- and fine-scale imaging modes are called MIPS70 and MIPS70F, respectively. The photometric repeatability is calculated to be 4.5% from two stars measured during every MIPS campaign and includes variations on all timescales probed. The preliminary fine-scale calibration factor is 2894 ± 294 MJy sr -1 MIPS70F -1 (10% uncertainty) based on 10 stars. The uncertainties in the coarse- and finescale calibration factors are dominated by the 4.5% photometric repeatability and the small sample size, respectively. The 5 σ, 500 s sensitivity of the coarse-scale observations is 6-8 mJy. This work shows that the MIPS 70 μm array produces accurate, well-calibrated photometry and validates the MIPS 70 μm operating strategy, especially the use of frequent stimulator flashes to track the changing responsivities of the Ge:Ga detectors. Original language English (US) Pages (from-to) 1019-1037 Number of pages 19 Journal Publications of the Astronomical Society of the Pacific Volume 119 Issue number 859 DOIs https://doi.org/10.1086/522675 State Published - 2007 ASJC Scopus subject areas Astronomy and Astrophysics Space and Planetary Science Access to Document 10.1086/522675 Other files and links Link to publication in Scopus Fingerprint Dive into the research topics of 'Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging'. Together they form a unique fingerprint. photometer Earth & Environmental Sciences 100% photometers Physics & Astronomy 75% photometry Physics & Astronomy 68% calibration Earth & Environmental Sciences 57% characterization Physics & Astronomy 46% stars Physics & Astronomy 38% flux density Physics & Astronomy 33% point spread functions Physics & Astronomy 30% View full fingerprint Cite this APA Standard Harvard Vancouver Author BIBTEX RIS Gordon, K. D., Engelbracht, C. W., Fadda, D., Stansberry, J., Wachter, S., Frayer, D. T., Rieke, G., Noriega-Crespo, A., Latter, W. B., Young, E., Neugebauer, G., Balog, Z., Beeman, J. W., Dole, H., Egami, E., Haller, E. E., Hines, D., Kelly, D., Marleau, F., ... Wheaton, W. A. (2007). Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging. Publications of the Astronomical Society of the Pacific, 119(859), 1019-1037. https://doi.org/10.1086/522675 Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging. / Gordon, Karl D.; Engelbracht, Charles W.; Fadda, Dario; Stansberry, John; Wachter, Stefanie; Frayer, Dave T.; Rieke, George; Noriega-Crespo, Alberto; Latter, William B.; Young, Erick; Neugebauer, Gerry; Balog, Zoltan; Beeman, Jeffrey W.; Dole, Hervé; Egami, Eiichi; Haller, Eugene E.; Hines, Dean; Kelly, Doug; Marleau, Francine; Misselt, Karl; Morrison, Jane; Pérez-González, Pablo; Rho, Jeonghee; Wheaton, Wm A. In: Publications of the Astronomical Society of the Pacific, Vol. 119, No. 859, 2007, p. 1019-1037. Research output: Contribution to journal › Article › peer-review Gordon, KD, Engelbracht, CW, Fadda, D, Stansberry, J, Wachter, S, Frayer, DT, Rieke, G, Noriega-Crespo, A, Latter, WB, Young, E, Neugebauer, G, Balog, Z, Beeman, JW, Dole, H, Egami, E, Haller, EE, Hines, D, Kelly, D, Marleau, F, Misselt, K, Morrison, J, Pérez-González, P, Rho, J & Wheaton, WA 2007, 'Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging', Publications of the Astronomical Society of the Pacific, vol. 119, no. 859, pp. 1019-1037. https://doi.org/10.1086/522675 Gordon KD, Engelbracht CW, Fadda D, Stansberry J, Wachter S, Frayer DT et al. Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging. Publications of the Astronomical Society of the Pacific. 2007;119(859):1019-1037. https://doi.org/10.1086/522675 Gordon, Karl D. ; Engelbracht, Charles W. ; Fadda, Dario ; Stansberry, John ; Wachter, Stefanie ; Frayer, Dave T. ; Rieke, George ; Noriega-Crespo, Alberto ; Latter, William B. ; Young, Erick ; Neugebauer, Gerry ; Balog, Zoltan ; Beeman, Jeffrey W. ; Dole, Hervé ; Egami, Eiichi ; Haller, Eugene E. ; Hines, Dean ; Kelly, Doug ; Marleau, Francine ; Misselt, Karl ; Morrison, Jane ; Pérez-González, Pablo ; Rho, Jeonghee ; Wheaton, Wm A. / Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging. In: Publications of the Astronomical Society of the Pacific. 2007 ; Vol. 119, No. 859. pp. 1019-1037. @article{74dea15c7ee041ca85c15bb15e9e6fc7, title = "Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging", abstract = "The absolute calibration and characterization of the Multiband Imaging Photometer for Spitzer (MIPS) 70 μm coarse- and fine-scale imaging modes are presented based on over 2.5 yr of observations. Accurate photometry (especially for faint sources) requires two simple processing steps beyond the standard data reduction to remove long-term detector transients. Point-spread function (PSF) fitting photometry is found to give more accurate flux densities than aperture photometry. Based on the PSF fitting photometry, the calibration factor shows no strong trend with flux density, background, spectral type, exposure time, or time since anneals. The coarse-scale calibration sample includes observations of stars with flux densities from 22 mJy to 17 Jy, on backgrounds from 4 to 26 MJy sr -1, and with spectral types from B to M. The coarse-scale calibration is 702 ± 35 MJy sr -1 MIPS70 -1 (5% uncertainty) and is based on measurements of 66 stars. The instrumental units of the MIPS 70 μm coarse- and fine-scale imaging modes are called MIPS70 and MIPS70F, respectively. The photometric repeatability is calculated to be 4.5% from two stars measured during every MIPS campaign and includes variations on all timescales probed. The preliminary fine-scale calibration factor is 2894 ± 294 MJy sr -1 MIPS70F -1 (10% uncertainty) based on 10 stars. The uncertainties in the coarse- and finescale calibration factors are dominated by the 4.5% photometric repeatability and the small sample size, respectively. The 5 σ, 500 s sensitivity of the coarse-scale observations is 6-8 mJy. This work shows that the MIPS 70 μm array produces accurate, well-calibrated photometry and validates the MIPS 70 μm operating strategy, especially the use of frequent stimulator flashes to track the changing responsivities of the Ge:Ga detectors.", author = "Gordon, {Karl D.} and Engelbracht, {Charles W.} and Dario Fadda and John Stansberry and Stefanie Wachter and Frayer, {Dave T.} and George Rieke and Alberto Noriega-Crespo and Latter, {William B.} and Erick Young and Gerry Neugebauer and Zoltan Balog and Beeman, {Jeffrey W.} and Herv{\'e} Dole and Eiichi Egami and Haller, {Eugene E.} and Dean Hines and Doug Kelly and Francine Marleau and Karl Misselt and Jane Morrison and Pablo P{\'e}rez-Gonz{\'a}lez and Jeonghee Rho and Wheaton, {Wm A.}", year = "2007", doi = "10.1086/522675", language = "English (US)", volume = "119", pages = "1019--1037", journal = "Publications of the Astronomical Society of the Pacific", issn = "0004-6280", publisher = "University of Chicago", number = "859", } TY - JOUR T1 - Absolute calibration and characterization of the multiband imaging photometer for Spitzer. II. 70 μm imaging AU - Gordon, Karl D. AU - Engelbracht, Charles W. AU - Fadda, Dario AU - Stansberry, John AU - Wachter, Stefanie AU - Frayer, Dave T. AU - Rieke, George AU - Noriega-Crespo, Alberto AU - Latter, William B. AU - Young, Erick AU - Neugebauer, Gerry AU - Balog, Zoltan AU - Beeman, Jeffrey W. AU - Dole, Hervé AU - Egami, Eiichi AU - Haller, Eugene E. AU - Hines, Dean AU - Kelly, Doug AU - Marleau, Francine AU - Misselt, Karl AU - Morrison, Jane AU - Pérez-González, Pablo AU - Rho, Jeonghee AU - Wheaton, Wm A. PY - 2007 Y1 - 2007 N2 - The absolute calibration and characterization of the Multiband Imaging Photometer for Spitzer (MIPS) 70 μm coarse- and fine-scale imaging modes are presented based on over 2.5 yr of observations. Accurate photometry (especially for faint sources) requires two simple processing steps beyond the standard data reduction to remove long-term detector transients. Point-spread function (PSF) fitting photometry is found to give more accurate flux densities than aperture photometry. Based on the PSF fitting photometry, the calibration factor shows no strong trend with flux density, background, spectral type, exposure time, or time since anneals. The coarse-scale calibration sample includes observations of stars with flux densities from 22 mJy to 17 Jy, on backgrounds from 4 to 26 MJy sr -1, and with spectral types from B to M. The coarse-scale calibration is 702 ± 35 MJy sr -1 MIPS70 -1 (5% uncertainty) and is based on measurements of 66 stars. The instrumental units of the MIPS 70 μm coarse- and fine-scale imaging modes are called MIPS70 and MIPS70F, respectively. The photometric repeatability is calculated to be 4.5% from two stars measured during every MIPS campaign and includes variations on all timescales probed. The preliminary fine-scale calibration factor is 2894 ± 294 MJy sr -1 MIPS70F -1 (10% uncertainty) based on 10 stars. The uncertainties in the coarse- and finescale calibration factors are dominated by the 4.5% photometric repeatability and the small sample size, respectively. The 5 σ, 500 s sensitivity of the coarse-scale observations is 6-8 mJy. This work shows that the MIPS 70 μm array produces accurate, well-calibrated photometry and validates the MIPS 70 μm operating strategy, especially the use of frequent stimulator flashes to track the changing responsivities of the Ge:Ga detectors. AB - The absolute calibration and characterization of the Multiband Imaging Photometer for Spitzer (MIPS) 70 μm coarse- and fine-scale imaging modes are presented based on over 2.5 yr of observations. Accurate photometry (especially for faint sources) requires two simple processing steps beyond the standard data reduction to remove long-term detector transients. Point-spread function (PSF) fitting photometry is found to give more accurate flux densities than aperture photometry. Based on the PSF fitting photometry, the calibration factor shows no strong trend with flux density, background, spectral type, exposure time, or time since anneals. The coarse-scale calibration sample includes observations of stars with flux densities from 22 mJy to 17 Jy, on backgrounds from 4 to 26 MJy sr -1, and with spectral types from B to M. The coarse-scale calibration is 702 ± 35 MJy sr -1 MIPS70 -1 (5% uncertainty) and is based on measurements of 66 stars. The instrumental units of the MIPS 70 μm coarse- and fine-scale imaging modes are called MIPS70 and MIPS70F, respectively. The photometric repeatability is calculated to be 4.5% from two stars measured during every MIPS campaign and includes variations on all timescales probed. The preliminary fine-scale calibration factor is 2894 ± 294 MJy sr -1 MIPS70F -1 (10% uncertainty) based on 10 stars. The uncertainties in the coarse- and finescale calibration factors are dominated by the 4.5% photometric repeatability and the small sample size, respectively. The 5 σ, 500 s sensitivity of the coarse-scale observations is 6-8 mJy. This work shows that the MIPS 70 μm array produces accurate, well-calibrated photometry and validates the MIPS 70 μm operating strategy, especially the use of frequent stimulator flashes to track the changing responsivities of the Ge:Ga detectors. UR - http://www.scopus.com/inward/record.url?scp=35348878437&partnerID=8YFLogxK UR - http://www.scopus.com/inward/citedby.url?scp=35348878437&partnerID=8YFLogxK U2 - 10.1086/522675 DO - 10.1086/522675 M3 - Article AN - SCOPUS:35348878437 VL - 119 SP - 1019 EP - 1037 JO - Publications of the Astronomical Society of the Pacific JF - Publications of the Astronomical Society of the Pacific SN - 0004-6280 IS - 859 ER - Powered by Pure, Scopus & Elsevier Fingerprint Engine™ © 2022 Elsevier B.V We use cookies to help provide and enhance our service and tailor content. By continuing you agree to the use of cookies Log in to Pure About web accessibility Contact us
