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X-shooter

User Manual

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VLT-MAN-ESO-12000-0115
1
01.03.2009
47 of 60

ESO, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany

5.1.3.1.9 Generic offsets

Table 24: User defined and fixed parameters for

SHOOT_ifu_obs_GenericOffset.

SHOOT_ifu_obs_GenericOffset

Keyword

Range

Default

Label in P2PP

Free parameters

DET1.WIN1.UIT1

0..3600

NODEFAULT

UVB Exposure Time (s)

DET1.READ.CLKDESCR

see

Table 5

100k/1pt/hg

UVB read-out mode

DET2.WIN1.UIT1

0..3600

NODEFAULT

VIS Exposure Time (s)

DET2.READ.CLKDESCR

see

Table 5

100k/1pt/hg

VIS read-out mode

DET3.DIT

0.88..3600

NODEFAULT

NIR Detector Integration
Time (s)

DET3.NDIT

1..9999

number of DITs

SEQ.NEXP.UVB

0..999

UVB number of exposures
per offset position

SEQ.NEXP.VIS

0..999

VIS number of exposure
per offset position

SEQ.NEXP.NIR

0..999

NIR number of exposure
per offset position

SEQ.OFFSET.COORDS SKY,SLIT

SKY

Offset coordinate

type

RA/DEC or X/Y

SEQ.RELOFF1

-3600..3600

NODEFAULT

List of RA/X offsets (“)

SEQ.RELOFF2

-3600..3600

NODEFAULT

List of DEC/Y offsets (“)

SEQ.OBS.TYPE

O,S

List of observation type
(object or sky)

SEQ.NOFFSET

0..99

Number of offsets

SEQ.OFFSET.ZERO

T, F

Return to Origin?

SEQ.AGSNAPSHOT

T,F

Take an acquisition image
before science exposures?

Fixed Values

INS.MODE

SLITSPEC,
IFUSPEC

IFUSPEC

Instrument Mode

INS.OPTI3.NAME

1”x12.6”

UVB Slit slide

INS.OPTI4.NAME

1”x12.6”

VIS Slit slide

INS.OPTI5.NAME

1”x12.6”

NIR Slit slide

Содержание X-shooter

Страница 1: ...09 Prepared Jo l Vernet Name Date Signature Approved Sandro D Odorico Name Date Signature Released Name Date Signature European Organisation for Astronomical Research in the Southern Hemisphere Organi...

Страница 2: ...X shooter User Manual Doc Issue Date Page VLT MAN ESO 12000 0115 1 01 03 2009 2 of 60 ESO Karl Schwarzschild Str 2 85748 Garching bei M nchen Germany...

Страница 3: ...5748 Garching bei M nchen Germany CHANGE RECORD ISSUE DATE SECTION PARA AFFECTED REASON INITIATION DOCUMENTS REMARKS 0 1 13 01 06 All FDR version ToC prepared by C line P roux 0 2 14 08 08 All PAE ver...

Страница 4: ...n Correctors 15 2 2 2 The UVB spectrograph 16 Slit carriage 16 Optical layout 17 Detector 17 2 2 3 The VIS spectrograph 19 Slit carriage 19 Optical layout 19 Detector 19 2 2 4 The NIR spectrograph 19...

Страница 5: ...tions 36 5 1 2 Acquisition templates 37 Slit acquisition template 37 IFU acquisition template 38 5 1 3 Science templates 39 Slit observations 39 5 1 3 1 1 Staring 39 5 1 3 1 2 Synchronized staring sli...

Страница 6: ...X shooter User Manual Doc Issue Date Page VLT MAN ESO 12000 0115 1 01 03 2009 6 of 60 ESO Karl Schwarzschild Str 2 85748 Garching bei M nchen Germany...

Страница 7: ...UV blue arm Range 300 550 nm in 12 orders Resolution 5100 1 slit Slit width 0 5 0 8 1 0 1 3 1 6 5 0 Detector 4k x 2k E2V CCD Visual red arm Range 550 1000 nm in 14 orders Resolution 8800 0 9 slit Sli...

Страница 8: ...characteristics are summarized in Table 1 X shooter was built by a Consortium involving institutes from Denmark Italy The Netherlands France and ESO Name of the institutes and their respective contrib...

Страница 9: ...Software DFS Data Flow System ESO European Southern Observatory GUI Graphical User Interface ICS Instrument Control Software IFU Integral Field Unit ISF Instrument Summary File IWS Instrument Worksta...

Страница 10: ...omponents The backbone which is directly mounted on the Cassegrain derotator of the telescope It contains all pre slit optics the calibration unit a slide with the 3 positions mirror and the IFU the a...

Страница 11: ...X shooter in the order they are encountered along the optical path going from the telescope to the detectors see Figure 2 The functionalities of the different sub units are explained and reference is...

Страница 12: ...libration system is given in Section 4 The Acquisition and Guiding slide Light coming either directly from the telescope or from the Calibration Unit described above reaches first the A G slide This s...

Страница 13: ...t transmission TBC but drops to 50 TBC below 400 nm due to reduced coating efficiency in the blue The Acquisition and Guiding Camera The A G camera allows to visually detect and centroid objects from...

Страница 14: ...ng 80 of the energy for a seeing of 0 8 for airmass 1 with sky brightness 3 days from new moon Filter 1 Effective Central 2 Effective FWHM 3 Efficiency incl atmosphere 4 Limiting Mag 3s SNR 5 5 Limiti...

Страница 15: ...rotating double prisms The focal reducers bring the focal ratio from f 13 41 to f 6 5 and provide a measured plate scale at the entrance slit of the spectrographs of 3 91 mm in the UVB and 3 82 mm in...

Страница 16: ...d with the LPKF Laser Cutter used for FORS and VIMOS It is mounted on a motorized slide in order to select one of the 9 positions available All science observation slits are 11 high and different widt...

Страница 17: ...varies by 22 7 m C which corresponds to a defocus of 9 m C or 0 08 C This is automatically compensated at the beginning of every exposure by moving the triplet doublet of the camera by 10 9 m C Detect...

Страница 18: ...High 0 64 Low 1 5 2 12 Readout noise e rms Slow 2 6 Fast 4 5 Slow 3 2 Fast 5 3 Short DIT 22 DIT 600s 5 5 Saturation ADU 65000 TBC 65000 45000 TBC Full frame readout time s 1x1 slow fast 70 19 1x2 slo...

Страница 19: ...m at f 2 8 plate scale 8 98 mm onto the detector not tilted Focussing is obtained by acting on the triplet doublet sub unit of the camera However unlike the UVB arm the back focal length varies less t...

Страница 20: ...d calibration masks Size Purpose 0 4 11 slit SCI CAL 0 6 11 slit SCI CAL 0 9 11 slit SCI CAL 1 2 11 slit SCI CAL 1 5 11 slit SCI CAL 5 0 11 slit CAL Raw of 9 pinholes of 0 5 spaced at 1 4 CAL 0 5 pinh...

Страница 21: ...off plane angle is 1 8 After dispersion the collimator creates an intermediate spectrum near the entrance slit where M8 a spherical mirror acts as a field mirror relocating the pupil between L2 and L...

Страница 22: ...ESO 12000 0115 1 01 03 2009 22 of 60 ESO Karl Schwarzschild Str 2 85748 Garching bei M nchen Germany Figure 8 example of UVB top VIS middle and NIR bottom calibration frames Strong order curvature an...

Страница 23: ...30 525 3 550 5 561 0 29 535 8 568 0 580 2 28 554 6 585 9 600 8 27 575 2 607 7 622 9 26 597 4 629 5 646 8 25 621 3 653 8 672 5 24 647 2 682 1 700 4 23 675 4 711 2 730 7 22 706 1 742 6 763 8 21 739 7 7...

Страница 24: ...559 5 nm and 1024 nm respectively Between UVB and VIS the region where the combined dichroics transmit less than 80 is 556 0 563 8 nm 7 8 nm wide This region falls in the UVB order 13 and VIS order 29...

Страница 25: ...ers air mass 1 2 0 8 seeing 1 slit for UVB 0 9 slit for VIS and NIR The first version of the ESO ETC was used to compute these values The model uses overall efficiencies measured during commissioning...

Страница 26: ...out it has to wait until the first one is fully readout and transferred to disk until readout can start 2 4 2 Remnance TBD 2 4 3 Instrument stability Backbone flexures The active flexure compensation...

Страница 27: ...nhole present in each slit slide Commands are sent to the three tip tilt mirrors based on computed flexures 4 The Acquisition and Guiding slide is set to MIR position the field is now visible in the a...

Страница 28: ...emplates SHOOT_slt_obs_StareSynchro or SHOOT_ifu_obs_StareSynchro should be used In this case the number of exposures is fixed to one per arm Exposure times can still be different in each arm but the...

Страница 29: ...sition S with the possibility of adding a small jittering around the object and the sky position One cycle is a pair of OS or SO observations Cycles are repeated in OSSO sequences For each arm the use...

Страница 30: ...5 s 3 4 2 Example of execution time computation Below a generic example of how total execution time shall be estimated For a nod on slit sequence with 2 cycles ABBA sequence returning to the original...

Страница 31: ...t IFU flats 5 setting D2 lamp 5 setting halo lamp 5 setting daily Pixel to pixel variations blaze function correction Arcs single pinhole 1 1 1 ON OFF weekly Pipeline calibration first guess disp solu...

Страница 32: ...ion is SHOOT_slt_cal_UvbVisArcsMultiplePinhole and SHOOT_slt_cal_NIRArcsMultiplePinhole provisional those two templates will be merged into a single one if the use of the ThAr lamp for the NIR arm is...

Страница 33: ...equency fringes with peak to valley amplitudes up to 5 are present in the red part of the VIS spectra 4 4 Spectrophotometric calibration 4 4 1 Telluric absorption correction The visual red and a near...

Страница 34: ...e used other stellar types as telluric standards For example F dwarfs are commonly used Users should think carefully about which star is best for their program Although the Observatory will automatica...

Страница 35: ...ully support both instrument modes SLIT and IFU and deliver the following products Sky subtracted cosmic ray hits cleaned flux and wavelength calibrated 2D spectra rectified to a regular grid in wavel...

Страница 36: ...stronomical offset conventions and definitions The positive position angle PA is defined from North to East Offsets are always given in arc seconds but the reference system can be chosen to be the sky...

Страница 37: ...differential tracking velocity arcsec s TEL TARG ADDVELDELTA 15 0 15 0 0 0 DEC differential tracking velocity arcsec s TEL TARG OFFSETALPHA 0 0 RA blind offset arcsec TEL TARG OFFSETDELTA 0 0 DEC bli...

Страница 38: ...l tracking velocity arcsec s TEL TARG ADDVELDELTA 15 0 15 0 0 0 DEC differential tracking velocity arcsec s TEL TARG OFFSETALPHA 0 0 RA blind offset arcsec TEL TARG OFFSETDELTA 0 0 DEC blind offset ar...

Страница 39: ...slide INS OPTI5 NAME see Table 8 NODEFAULT NIR Slit slide DET1 WIN1 UIT1 0 3600 NODEFAULT UVB Exposure Time s DET1 READ CLKDESCR see Table 5 100k 1pt hg UVB read out mode DET2 WIN1 UIT1 0 3600 NODEFA...

Страница 40: ...I5 NAME see Table 8 NODEFAULT NIR Slit slide DET1 WIN1 UIT1 0 3600 NODEFAULT UVB Exposure Time s DET1 READ CLKDESCR see Table 5 100k 1pt hg UVB read out mode DET2 WIN1 UIT1 0 3600 NODEFAULT VIS Exposu...

Страница 41: ...CLKDESCR see Table 5 100k 1pt hg UVB read out mode DET2 WIN1 UIT1 0 3600 NODEFAULT VIS Exposure Time s DET2 READ CLKDESCR see Table 5 100k 1pt hg VIS read out mode DET3 DIT 0 88 3600 NODEFAULT NIR Det...

Страница 42: ...d out mode DET2 WIN1 UIT1 0 3600 NODEFAULT VIS Exposure Time s DET2 READ CLKDESCR see Table 5 100k 1pt hg VIS read out mode DET3 DIT 0 88 3600 NODEFAULT NIR Detector Integration Time s DET3 NDIT 1 999...

Страница 43: ...NODEFAULT VIS Exposure Time s DET2 READ CLKDESCR see Table 5 100k 1pt hg VIS read out mode DET3 DIT 0 88 3600 NODEFAULT NIR Detector Integration Time s DET3 NDIT 1 9999 1 number of DITs SEQ NEXP UVB 0...

Страница 44: ...1pt hg UVB read out mode DET2 WIN1 UIT1 0 3600 NODEFAULT VIS Exposure Time s DET2 READ CLKDESCR see Table 5 100k 1pt hg VIS read out mode DET3 DIT 0 88 3600 NODEFAULT NIR Detector Integration Time s D...

Страница 45: ...hg UVB read out mode DET2 WIN1 UIT1 0 3600 NODEFAULT VIS Exposure Time s DET2 READ CLKDESCR see Table 5 100k 1pt hg VIS read out mode DET3 DIT 0 88 3600 NODEFAULT NIR Detector Integration Time s DET3...

Страница 46: ...88 3600 NODEFAULT NIR Detector Integration Time s DET3 NDIT 1 9999 1 number of DITs SEQ NEXP UVB 0 999 1 UVB number of exposures per offset position SEQ NEXP VIS 0 999 1 VIS number of exposure per off...

Страница 47: ...tegration Time s DET3 NDIT 1 9999 1 number of DITs SEQ NEXP UVB 0 999 1 UVB number of exposures per offset position SEQ NEXP VIS 0 999 1 VIS number of exposure per offset position SEQ NEXP NIR 0 999 1...

Страница 48: ...number of exposure Fixed Value INS MODE SLTSPEC Instrument Mode Table 26 User and fixed keywords for SHOOT_slt_cal_NIRArcs SHOOT_slt_cal_NIRArcs Keyword Range Default Label in P2PP INS OPTI5 NAME see...

Страница 49: ...Keyword Range Default Label in P2PP DET1 WIN1 UIT1 0 36000 1 UVB Exposure Time DET1 READ CLKDESCR see Table 5 400k 1pt lg UVB readout mode DET2 WIN1 UIT1 0 36000 1 VIS Exposure Time DET2 READ CLKDESC...

Страница 50: ...d keywords for SHOOT_slt_cal_UBVHighLampFlatSinglePinhole SHOOT_slt_cal_UVBHighLampFlatSinglePinhole tsf Keyword Range Default Label in P2PP DET1 WIN1 UIT1 0 36000 1 UVB Exposure Time DET1 READ CLKDES...

Страница 51: ...slt_cal_UVBVisArcsMultiplePinhole Keyword Range Default Label in P2PP DET1 WIN1 UIT1 0 36000 1 UVB Exposure Time DET1 READ CLKDESCR see Table 5 400k 1pt lg UVB readout mode DET2 WIN1 UIT1 0 36000 1 VI...

Страница 52: ...User and fixed keywords for SHOOT_ifu_cal_UBVLampFlat SHOOT_ifu_cal_UVBLampFlat Keyword Range Default Label in P2PP DET1 READ CLKDESCR see Table 5 100k 1pt hg UVB readout mode DET1 WIN1 UIT1 HIGHF 0 3...

Страница 53: ...ST T FF Lamp VIS Table 41 User and fixed keywords for SHOOT_slt_cal_NIRLampFlat SHOOT_slt_cal_NIRLampFlat Keyword Range Default Label in P2PP INS OPTI5 NAME see Table 8 NIR Slit slide DET3 DIT 0 36000...

Страница 54: ...T1 0 VIS Exposure Time Table 44 User and fixed keywords for SHOOT_gen_cal_DarkUVBVis SHOOT_gen_cal_DarkUVBVis Keyword Range Default Label in P2PP DET1 WIN1 UIT1 0 3600 1 UVB Exposure Time DET1 READ CL...

Страница 55: ...0 NODEFAULT NIR Exposure Time DET3 NDIT 1 9999 1 Number of DITs SEQ NEXPO UVB 0 999 1 UVB number of exposure SEQ NEXPO VIS 0 999 1 VIS number of exposure SEQ NEXPO NIR 0 999 1 NIR number of exposure F...

Страница 56: ...Number of DITs SEQ NEXPO UVB 0 30 1 UVB number of exposure SEQ NEXPO VIS 0 30 1 VIS number of exposure SEQ NEXPO NIR 0 30 1 NIR number of exposure Fixed Value INS MODE CALIB Instrument Mode Table 49...

Страница 57: ...2763 SCI CAL 6 1 12 6 slit 251 3165 With IFU only 7 Raw of 9 pinholes of 0 5 spaced at 1 4 126 holes spaced by 352 CAL 8 0 5 11 slit 126 2763 SCI CAL 9 1 0 x11 slit 251 2763 SCI CAL 5 2 2 VIS Table 5...

Страница 58: ...95 5683 CAL 3 0 9 11 slit 485 5683 SCI CAL 4 1 0 12 6 slit 544 6510 With IFU only 5 1 2 11 slit 647 5683 SCI CAL 6 tilted slit TECH focus 7 1 5 11 slit 809 5683 SCI CAL 8 Blind 9 0 4 pinhole 216 hole...

Страница 59: ...ge VLT MAN ESO 12000 0115 1 01 03 2009 59 of 60 ESO Karl Schwarzschild Str 2 85748 Garching bei M nchen Germany 5 4 A G camera filter curves A G Camera CCD 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 200...

Страница 60: ...X shooter User Manual Doc Issue Date Page VLT MAN ESO 12000 0115 1 01 03 2009 60 of 60 ESO Karl Schwarzschild Str 2 85748 Garching bei M nchen Germany...

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