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Sigma QUick Infrared Camera manual

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Table of contents for the manual

  • Page 1

    Obser v er’ s Guide f or QUIRC K.-W . Hodapp J.L. Hora M.R . Metzge r Univ ersity of Ha waii October 30, 1997[...]

  • Page 2

    [...]

  • Page 3

    October 30, 1997 1 1S y s t e m O v e r v i e w The Uni ve rsity of Ha wa ii (UH) Q Uick Infra red C amera (QUI RC ) utilizes a 1024 1024 pix el HgCdT e Astronomic al W ide Area Inf rare d Imaging ( HA W AII ) arr ay produced by R ockwell S cienc e Ce nter . This ar ray is se nsitiv e to ra diation fro m 1 to 2.5 m. The reimaging optics pro vide a [...]

  • Page 4

    2 QUIRC User Guide in ca ses where the backgr ound ha s bee n changing r apidly . It may also gi ve be tter results if the dome fla t was not ev enly illumina ted (it is dif ficult to a chie ve e v en illumination a t the 0.6m te lescope ). The dark should be subtracted from t he sk y before division. The disadva ntages of this technique ar e tha[...]

  • Page 5

    October 30, 1997 3 2.2 Dewar T emperature The de war now has a tempera ture sensor and heater . For nor mal ope ration, the tempe rature controlle r should be used to set the detector temper ature to 80.0K. If the controller is not used, drifts can occur as the telesc ope is mov ed, re sulting in dark curr ent instabilitie s in the arra y . The ne [...]

  • Page 6

    4 QUIRC User Guide 3.1 W orkstation setup The program is run from a works tati on in th e contro l room , current ly io (or halley on the 88”). There is one confi guration file that qcdcom rea ds upon startup to dete rmine the telesc ope, secondar y , and ot her i nform atio n. There are four pres et con figurat ion files current ly us ed, lo[...]

  • Page 7

    October 30, 1997 5 3.2 QCDCOM S etup and Operat ion The qcdc om program should be run from the directory whe re you want your data to be writte n, though this can be changed from within qcdcom using the cd command. So e xe cute the follo wing comma nds: % cd /scr/data (or whe re ver your data should go) % qcdcom Whe n qcdcom is starte d, it initial[...]

  • Page 8

    6 QUIRC User Guide belo w . This puts t he progr am into a mode tha t will be appropriate f or most obse rving, and will a t lea st allow one to obtain “nor mal” image s. The description of the auto com mand below li sts t he p aramet ers t o be s et. Th e pr oper d efault s are # resets 1, shutter on, r eadout on, write on, idle on, double-co [...]

  • Page 9

    October 30, 1997 7 4 Writing Scripts and T aking Mos aics An y sequence of qc dcom comma nds ca n be entere d into a te xt file (using your fav orite editor) and e x ecute d by qcdc om. The command to do this is source file , wher e file is the file name of the comma nd list. This allo ws some routine types of obse rv ations to be perfo rmed au[...]

  • Page 10

    8 QUIRC User Guide positions ar e a va ilable for filters. These will include the standard broadband filters J, H, K, K ,a n d H+K. In a ddition ther e will usually be se ver al narro wband and othe r spec ial purpose fi lters insta lled. Be low is a list of the cur rent filte rs as of the date of this manual. These are subject to change ; the [...]

  • Page 11

    October 30, 1997 9 5.2 T aking Dark Frame s Sinc e the re is no blank position in the fi lter w heel and the shutter is war m, some ex tra c are is re quired to obtain re asonable dark fr ames. W ith the installation of the sec ond filte r whee l, a “LO WFLUX " setting has be en pro vided. This se tting selec ts two fi lters simulta neous[...]

  • Page 12

    10 QUIRC User Guide progra m is describe d here . 7.1 Setting up The setup file .vf-init has been installed in the home direc tory of the user obs . If running from a dif fer ent user name, you must ha ve this file in your home direc tory , as well a s the *.cm fil es and ps proc . The progra m can be run by typing the f ollowing in an y window:[...]

  • Page 13

    October 30, 1997 11 The TCS c oordinate windo w (under Options) can be used to ce nter a source or mo ve it ar ound the arr ay at the 88-inch. The plate sc ale defaults to the f/10 scale (0.1886 arc sec/pix) , for the f/31 scale it is 0. 0608 arcse c/pix. First mov e to the source a nd pre ss the “f" ke y , it will gr ab the pix el loca tion[...]

  • Page 14

    12 QUIRC User Guide ll file R ead DSP code .lod file ll re ads a DS P code binar y file into the Sparc station me mory . dl Download DS P code dl sends the DSP code to the DS P electr onics, and then ca uses the DSP to start e x ecuting this code. dl also a sks the DSP to r eca librate its A/D con ve rter , which take s about 2 sec onds. du file [...]

  • Page 15

    October 30, 1997 13 object time name Se tup for object object pr epar es qcdcom to ta ke an e xposure of a gene ral tar get. Y ou can spec ify inte gration time as the fir st ar gument and an object name a s the second. The object comma nd sets the automatic actions: # of resets: 1, shutter on, rea dout on. Exam pl e: object 300 N3031 (se t inte g[...]

  • Page 16

    14 QUIRC User Guide dither subtrac t on/of f This option, when turned on, will subtract the pre vious image from the curre nt one and store the result in a file with a “chop" adde d to the normal data file name instead of the file number . The name is t he same a s the chop mode descr ibed abo ve. This is often use ful when dithering on a[...]

  • Page 17

    October 30, 1997 15 fw wheel# position Set filter whe el to position Se t the spec ified fi lter wheel (1 or 2) to a spe cific position (1 through 8) . F or e xample, one would giv e the command fw 2 3 to mo ve filte r wheel 2 to position number 3. This command is norma lly not used, the fi com man d (see ab ov e) i s us ed to set the sta ndar[...]

  • Page 18

    16 QUIRC User Guide name objname Se t object na me name is use d to set the object na me which w ill be writte n to the FI TS header . pupil num command Set pupil position This comma nd se ts the pupil position. If no pupil number is gi ve n, a list of a va ilable pupils a re giv en and the curre nt pupil position is shown. If t he pupil numbe r is[...]

  • Page 19

    October 30, 1997 17 sound T oggle fa nc y sounds Qcdcom will use distinctiv e sounds f or va rious ope rations. If you don’ t wa nt to listen to them you ca n turn them of f with the sound command. synch “P ing” the DS P by sending it data a nd asking it to send it back. This is use ful to check t o see whet her the con trol ler i s alive and[...]

  • Page 20

    18 QUIRC User Guide Exam pl es: oc IDL put controller in idle m ode oc RDC per form de tector rea d diag l1 cnt r|c data 4MHz loopbac k test mode. T est fiber opt ic in terface in hardware loopback mode. Receiv er i s wi red for operatio n at 4M Hz, and a fiber is co nnect ed direct ly bet ween th e receiv er an d trans m itter . This test runs c[...]