ChaMPlane Observation: Magellan 6.5m/LDSS-2 May 17-20, 2001

ChaMPlane Observation

Magellan 6.5m/LDSS-2 July 25-28, 2001

I. LDSS-2 Multi-slit Spectroscopy

LDSS-2 Multi-slit Spectroscopy will cover following three fields in order of priority. All of them have been observed with Chandra. Their deep Mosaic imaging were taken at CTIO in May 2000. Use Med/Blue grism with NO blocking filter for the multi-slit and single slit spectra. 
                      ChaMPlane Observation July 25-28, 2001   

N  Object                  RA        Dec(J2000)   glong   glat  nH(e22)  Exp Mask
---------------------------------------------------------------------------------
1  SgrB2                17:47:06.70 -28:26:47.3   0.590 -0.025  1.290  100.0  16
2  Galactic Center Arc  17:46:20.00 -28:52:00.0   0.142 -0.097  1.100   50.0   4
3  SgrA*                17:45:40.00 -29:00:28.0 359.946 -0.046  1.090   50.0   9
---------------------------------------------------------------------------------

1. SgrB2 Field

Sisteen multi-slit masks were cut to cover 226 sources in the SgrB2 field. 160 of them are X-ray sources; 67 are Ha sources; one of the X-ray source is also an Ha source. 
                   SgrB2 Field Mask List   Mask PA = 270 degree

    Mask    M F Algn N of    Center of Mask          Telescope Pointing            
Pri Map     C C Star Slit  RA       Dec (J2000)     RA       Dec (J2000)  Mag range
-----------------------------------------------------------------------------------
1  SgrB2_1  M F  3  22  17 47  7.39 -28 26 28.6  17 47  7.39 -28 27 19.8  14.0-23.1  
2  SgrB2_2  M F  3  20  17 47 14.97 -28 28  8.6  17 47 14.97 -28 28 59.8  14.1-22.6  
3  SgrB2_3  M F  3  18  17 47 14.97 -28 26 28.6  17 47 14.97 -28 27 19.8  14.9-24.5  
4  SgrB2_4  M F  4  15  17 46 46.16 -28 28  8.6  17 46 46.16 -28 28 59.8  12.9-24.9  
5  SgrB2_5  M F  4  17  17 47 22.55 -28 29 48.6  17 47 22.55 -28 30 39.8  15.3-24.3  
6  SgrB2_6  M F  3  15  17 47  9.66 -28 23  8.6  17 47  9.66 -28 23 59.8  14.9-24.8  
7  SgrB2_7  M F  4  13  17 46 44.64 -28 24 48.6  17 46 44.64 -28 25 39.8  14.8-24.4  
8  SgrB2_8  M F  3  14  17 47  2.08 -28 31 58.6  17 47  2.08 -28 32 49.8  16.2-24.0  
9  SgrB2_9  M F  4  10  17 47 24.83 -28 20 48.6  17 47 24.83 -28 21 39.8  14.7-21.8  
10 SgrB2_10 M F  4  10  17 47 21.04 -28 26 48.6  17 47 21.04 -28 27 39.8  17.4-24.2  
11 SgrB2_11 M F  4  12  17 47 37.72 -28 33 28.6  17 47 37.72 -28 34 19.8  15.5-22.5  
12 SgrB2_12 M F  4  16  17 47 37.72 -28 38  8.6  17 47 37.72 -28 38 59.8  20.8-22.7  
13 SgrB2_13 M F  3  17  17 47 14.97 -28 46 58.6  17 47 14.97 -28 47 49.8  19.7-22.2  
14 SgrB2_14 M F  4   8  17 47 32.41 -28 21 38.6  17 47 32.41 -28 22 29.8  16.0-22.8  
15 SgrB2_15 M F  4   9  17 47 15.73 -28 40 18.6  17 47 15.73 -28 41  9.8  18.5-22.6  
16 SgrB2_16 M F  4  11  17 47  6.63 -28 46 28.6  17 47  6.63 -28 47 19.8  20.4-22.2  
-----------------------------------------------------------------------------------
Total sources:226; Chandra sources:160; Ha sources:67; Chandra sources with Ha:1			       

Here is a list of magnitudes of all the objects covered by the masks.

Mask map is E-left & N-up. Slits go E-W. Magnitude Charts (5.0' x 6.8') are the same as Mask maps but marked with magnitudes. Finding Charts (6.1' x 7.9', E-up & N-right) show the R image taken with CTIO/4m/MosaicII. The sources are circled on the image with ID numbers and R magnitudes. Sources with ID numbers less than 500 are X-ray sources; greater than 500 and less than 1000 are Ha sources; greater than 1000 are alignment stars

Here is a list of all the sources, including the sources covered by the masks, mask alignment stars and the left over sources for the slit spectroscopy, with their RA, Dec, Rmag and ID. Here is the same list, but instead of absolute RA and Dec are the RA and Dec offset in arcecond from the Chandra aimpoint (266.78079 -28.441287; 17 47 7.39 -28 26 28.6).

2. Galactic Center Arc Field

Four multi-slit masks were cut to cover 48 sources in the Galactic Center Arc field. 30 of them are X-ray sources; 18 are Ha sources. 
            Galactic Center Arc Field Mask List   Mask PA = 180 degree

    Mask    M F Algn N of    Center of Mask          Telescope Pointing            
Pri Map     C C Star Slit  RA       Dec (J2000)     RA       Dec (J2000)  Mag range
-----------------------------------------------------------------------------------
1  GalCA_1  M F  3  22  17 47  7.39 -28 26 28.6  17 47  7.39 -28 27 19.8  14.0-23.1
2  GalCA_2  M F  3  20  17 47 14.97 -28 28  8.6  17 47 14.97 -28 28 59.8  14.1-22.6  
3  GalCA_3  M F  3  18  17 47 14.97 -28 26 28.6  17 47 14.97 -28 27 19.8  14.9-24.5  
4  GalCA_4  M F  4  15  17 46 46.16 -28 28  8.6  17 46 46.16 -28 28 59.8  12.9-24.9  
-----------------------------------------------------------------------------------
Total sources:48; Chandra sources:30; Ha sources:18; Chandra sources with Ha: 0

Here is a list of magnitudes of all the objects covered by the masks.

Mask map is E-up & N-right. Slits go N-S. Magnitude Charts (6.8' x 5.0') are the same as Mask maps but marked with magnitudes. Finding Charts (7.9' x 6.1', E-up & N-right) show the R image taken with CTIO/4m/MosaicII. The sources are circled on the image with ID numbers and R magnitudes. Sources with ID numbers less than 500 are X-ray sources; greater than 500 and less than 1000 are Ha sources; greater than 1000 are alignment stars

Here is a list of all the sources, including the sources covered by the masks, mask alignment stars and the left over sources for the slit spectroscopy, with their RA, Dec, Rmag and ID. Here is the same list, but instead of absolute RA and Dec are the RA and Dec offset in arcecond from the Chandra aimpoint (266.58223 -28.872350; 17 46 19.74 -28 52 20.5).

3. SgrA* Field

SgrA* Field spectral observation was carried out in May 2001 with Magellan 6.5m/LDSS-2. Nine multi-slit masks were cut to cover 94 sources in the SgrA* field. 86 out of the 94 are X-ray sources, 10 are Ha sources, two of the Ha sources are also X-ray sources. Some sources are covered by two masks. The first 6 high priority masks were observed. The rest of 3 were not observed. 
                         SgrA* Field Mask List    Mask PA = 270 degree


    Mask    M F Algn N of    Center of Mask          Telescope Pointing             Observed
Pri Map     C C Star Slit  RA       Dec (J2000)     RA       Dec (J2000)  Mag range  in May?
--------------------------------------------------------------------------------------------
1  SgrA1    M F  3  20  17 45 40.00 -29 00 28.0  17 45 40.00 -29 01 19.2  14.0-22.8    Y
2  SgrA2    M F  3  21  17 45 40.00 -28 58 28.0  17 45 40.00 -28 59 19.2  15.5-23.3    Y
3  SgrA4    M F  4  15  17 45 30.85 -29 00 28.0  17 45 30.85 -29 01 19.2  16.0-24.6    Y
4  SgrA3    M F  4  13  17 45 40.00 -29 02 58.0  17 45 40.00 -29 03 49.2  15.2-23.1    Y
5  SgrA7    M F  3  12  17 45 47.62 -28 55  8.0  17 45 47.62 -28 55 59.2  16.4-23.3    Y
6  SgrA6    M F  5  10  17 46  2.87 -29 01 48.0  17 46  2.87 -29 02 39.2  15.4-23.8    Y
7  SgrA9    M F  4   5  17 47  9.96 -28 41 13.7  17 47  9.96 -28 42  4.9  18.6-21.7    N
8  SgrA5    M F  3   9  17 45  4.93 -29 00 48.0  17 45  4.93 -29 01 39.2  17.0-22.4    N
9  SgrA8    M F  3   8  17 45 59.06 -29 07  8.0  17 45 59.06 -29 07 59.2  14.1-23.8    N
--------------------------------------------------------------------------------------------
Total sources:94; Chandra sources:86; Ha sources:10; Chandra sources with Ha: 2

Here is a list of magnitudes of all the objects covered by the masks.
Priorities are sorted by number of slits on the mask, except for mask SgrA9 with priority 7, which has 5 slits for relatively bright Ha sources

Mask map is E-left & N-up. Slits go E-W. Magnitude Charts (5.0' x 6.8') are the same as Mask maps but marked with magnitudes. Finding Charts (6.5' x 8.1') show the deep R image taken with CTIO/4m/MosaicII. The sources are circled on the image with ID numbers and R magnitudes. Sources with ID numbers less than 500 are X-ray sources; greater than 500 and less than 1000 are Ha sources; greater than 1000 are alignment stars

Here is a list of all the sources, including the sources covered by the masks, mask alignment stars and the left over sources for the slit spectroscopy, with their ID, Rmag, RA and Dec. Here is the same list, but instead of absolute RA and Dec are the RA and Dec offset in arcecond from the Chandra aimpoint (266.417 -29.0078; 17 45 40.00 -29 00 28.0).

II. Single slit Spectroscopy

Following are the brightest H-alpha eccess objects detected by imaging and are not covered by masks. They are to be done by long single slit. Click ID numbers to see the finding charts, which are deep R images taken with CTIO 4m/MosaicII (E-up & N-right, 6.5' x 7.9').

1. SgrB2 Field

  SgrB2 Field Sources for Single slit Spectroscopy

Pri    RA            Dec       Mag     Ha-R    S/N   OptID  ID 
---------------------------------------------------------------
1   17 47 46.61  -28 13  5.1  17.465  -0.918  143.4  64374  501
2   17 47 47.42  -28 15 43.7  19.940  -0.997   88.1  64818  507
3   17 46 55.03  -28 35 57.0  20.495  -0.830   46.6  36136  513
4   17 47  4.72  -28 47 26.2  20.824  -0.863   32.4  41048  523
---------------------------------------------------------------

2. Galactic Center Arc Field

  Galactic Center Arc Field Sources for Single slit Spectroscopy

Pri    RA            Dec       Mag     Ha-R    S/N   OptID  ID
---------------------------------------------------------------
1   17 48  7.14  -28 59 16.4  19.889  -0.410   12.0  63769  505
2   17 47 35.23  -28 58  9.9  20.589  -0.728   39.5  46635  511
3   17 46 55.60  -29 01  2.1  20.762  -0.472   21.5  26633  512
4   17 46  7.52  -28 59 51.3  21.323  -0.666   20.9   6622  535 X-ray!
---------------------------------------------------------------

3. SgrA* Field

SgrA* Field Sources for Single slit Spectroscopy

Priority   RA            Dec         R Mag   ID  
------------------------------------------------
1       17 47  9.41  -28 49 23.5     17.649  501
2       17 46 55.03  -28 35 57.1     20.495  505
3       17 46 33.20  -29 02 14.2     20.502  506
4       17 46  7.50  -28 59 51.2     21.205  508
5       17 47 27.22  -29 00 11.2     21.510  511
6       17 47  5.40  -28 51 36.5     22.386  515
7       17 46 34.77  -29 10 12.5     22.466  517
------------------------------------------------

III. 47 Tuc Field

Use Med/Blue grism with no blocking filter for the multi-slit spectra. 
                          47 Tuc Field Mask   Mask PA = 135 degree

    Mask    F Algn N of     Center of Mask(*)       Telescope Pointing            
Pri Map     C Star Slit   RA       Dec (J2000)     RA       Dec (J2000)  Mag range
----------------------------------------------------------------------------------
1  47Tuc    F  4  18   00 24 05.29 -72 04 52.7  00 24 08.28 -72 03 26.5  17.4-21.9
----------------------------------------------------------------------------------
(*) The assumed field center is the reference position for the targets. This was used to generate the delta(RA) and delta(Dec) values in the mask generation program. Click on the mask name to see the mask map. The mask PA = 135 deg, so E is to the upper right, N to lower right (these directions are labeled on the finding chart). Primary targets (optical counterparts to X-ray sources and sky slits) are shown in red circles, the alignment stars with blue circles and several bright red giants (useful for fixing the telescope pointing) are shown with maroon circles. Click on the Finding Chart name to see the Finding Chart (~3' x 3') for that mask, based on a WFPC2 mosaic. E & N directions are as labeled. Sources with ID numbers less than 200 are optical counterparts; greater than 500 and less than 600 are sky slits; greater than 1000 are alignment stars

Here is a list of all the source positions in RA and Dec. This includes the target optical counterparts, the sky slits and the mask alignment stars, as numbered above. This is a similar list except it gives the offset source positions with respect to RA = 00 24 05.29, Dec = -72 04 52.7, the assumed field center given above. Here is a list of the positions of 6 bright red giants shown in the finding chart (in the HST coordinate frame used to generate the masks).

IV. LMC X-3

To measure the radial velocity of LMC X-3. Use high grism and NO blocking filter for the single slit spectra. 
Object	    RA          Dec      V Mag   Spectral  Exp
-------------------------------------------------------
LMC X-3  05 38 56.4 -64 05 01	 17.2    B3Ve     30min
Comp828	 05 27 02.1 -68 46 20    14.9    B2V       5min
-------------------------------------------------------

V. Observing Chart and Almanac

Here is an observing chart showing the locus of targets during the night. Horizontal axis is the time in hours. Space between two gray bars are the astronomital twilight zone. Versitcal axis is the distance of the object above horizon in 10-degrees.


postscript and txt

Here is an observing almanac made for this run.

Here is an observing log of our Magellan May run by J. Silverman.

Ping Zhao: zhao@cfa.harvard.edu