ChaMPlane Observation: Magellan 6.5m/LDSS-2 June 16-19, 2002
ChaMPlane Observation
LDSS-2 Multi-slit (Mask) Spectroscopy will cover the following five
fields in the order of priority. All of them have been observed with
Chandra. Their deep Mosaic imaging were taken at CTIO in May 2000.
The masks for G347 and J1655 fields are newly made. The masks for the
other three fields were made last year but were not observed. Use
Med/Blue grism with NO blocking filters for all the mask
observations.
Target fields
Pri Field RA Dec(J2000) glong glat nH(e22) Exp Masks
----------------------------------------------------------------------------------
1 GRO J1655-40 16:54:28.90 -39:51:31.7 344.983 2.456 0.686 43.0 7
2 G347.5-0.5b 17:15:36.00 -39:58:36.0 347.368 -0.857 1.430 40.0 4
3 Galactic Center Arc 17:46:20.00 -28:52:00.0 0.142 -0.097 1.100 50.0 4
4 SgrB2 17:47:06.70 -28:26:47.3 0.590 -0.025 1.290 100.0 3
5 SgrA* 17:45:40.00 -29:00:28.0 359.946 -0.046 1.090 50.0 3
----------------------------------------------------------------------------------
Click a field name to see the Mosaic image with ACIS and source
overlay (E-up & N-right). Blue circles are Chandra sources; green
circles are optical counterparts of Chandra sources; red circles are
H-alpha emission sources. This is just for global viewing. For
details, see individual finding charts below.
Seven multi-slit masks were cut to cover 64 sources
in the GRO J1655-40 field. 39 of them are X-ray sources; 17 are Ha
sources. Two of them, source 40 and 65 on mask J1655_2, are Chandra
sources with Ha emission.
GRO J1655-40 Field Mask List
Mask PA = 270 degree (Slits are East-west)
Mask M F Algn N of Telescope Pointing X-Ha
Pri Map C C Star Slits RA Dec (J2000) Source
---------------------------------------------------------
1 J1655_2 M F 4 13 16 54 16.50 -39 52 50.0 #40,65
2 J1655_4 M F 3 15 16 53 54.70 -39 47 05.0
3 J1655_3 M F 4 11 16 54 04.50 -39 52 00.0
4 J1655_5 M F 4 8 16 53 51.60 -39 47 05.0
5 J1655_6 M F 4 6 16 54 06.10 -39 47 45.0
6 J1655_7 M F 4 6 16 53 49.50 -39 52 54.0
7 J1655_1 M F 3 5 16 54 15.30 -39 57 25.0
---------------------------------------------------------
Total sources:64; Chandra sources:39; Ha sources:17; Chandra sources with Ha emission: 2 (sources 40 and 65 on mask J1655_2)
Here is a list of the J1655 field
Chandra optical counterparts with H-alpha emission.
Here is a list of all the J1655 field
Chandra optical counterparts with chandra error circle < 3 arcsec and
daophot |sharpness|<0.8 & Chi^2<3.
Here is a list of all the J1655
field Chandra optical counterparts with chandra error circle < 3.5
arcsec and no daofit restriction.
Here is a list of all the
J1655 field H-alpha emission sources.
Mask maps are 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-left & N-up) show the R image taken with CTIO/4m/MosaicII.
The sources are circled on the image with ID numbers. 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
Four multi-slit masks were cut to cover 39 sources
in the G347.5-0.5b field. 31 of them are X-ray sources; 5 are Ha
sources. One of them, source 39 on mask G347b_1, is a
Chandra source with Ha emission.
G347.5-0.5b Field Mask List
Mask PA = 270 degree (Slits are East-west)
Mask M F Algn N of Telescope Pointing X-Ha
Pri Map C C Star Slits RA Dec (J2000) Source
---------------------------------------------------------
1 G347b_1 M F 4 7 17 15 26.00 -40 02 20.0 #39
2 G347b_3 M F 4 12 17 15 22.50 -39 54 58.0
3 G347b_2 M F 4 8 17 15 26.00 -39 59 40.0
4 G347b_4 M F 4 8 17 14 50.00 -39 55 02.0
---------------------------------------------------------
Total sources:35; Chandra sources:31; Ha sources:5; Chandra sources with Ha emission: 1 (source 39 on mask G347b_1)
Here is a list of the G347b field Chandra optical counterparts with H-alpha emission.
Here is a list of all the G347b field Chandra optical counterparts with chandra error circle < 3 arcsec
and daofit |sharpness|<0.8 & Chi^2<3.
Here is a list of all the G347b field Chandra optical counterparts with chandra error circle < 3.5 arcsec
and no daofit restriction.
Here is a list of all the G347b field H-alpha emission sources.
Mask maps are 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-left & N-up) show the R
image taken with CTIO/4m/MosaicII. The sources are circled on the image with ID numbers. 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
Four multi-slit masks
were cut to cover 48 sources in the Galactic Center Arc field. 30 of them are X-ray sources; 19 are Ha
sources. One of them, source 508 on mask GalCA_2, is a Chandra source with Ha emission.
Galactic Center Arc Field Mask List
Mask PA = 180 degree (Slits are North-south)
Mask M F Algn N of Telescope Pointing X-Ha
Pri Map C C Star Slits RA Dec (J2000) Mag range Source
--------------------------------------------------------------------
1 GalCA_2 M F 4 12 17 46 28.78 -28 53 25.5 15.1-21.3 #508
2 GalCA_1 M F 4 16 17 46 15.84 -28 52 20.5 14.9-23.1
3 GalCA_3 M F 4 12 17 46 59.24 -28 49 30.5 16.4-24.7
4 GalCA_4 M F 4 8 17 47 15.98 -28 41 30.5 17.0-22.0
--------------------------------------------------------------------
Total sources:48; Chandra sources:30; Ha sources:19; Chandra sources with Ha emission: 1 (source 508 on mask GalCA_2)
Here is a list of magnitudes of all the objects covered by the masks.
Mask maps are 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.
Sixteen 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 them, source 500 on mask SgrB2_14, is a Chandra source with Ha
emission. 13 of the 16 masks were observed in July 2001. Three unobserved masks are listed below.
SgrB2 Field Mask List
Mask PA = 270 degree (Slits are East-west)
Mask M F Algn N of Telescope Pointing X-Ha
Pri Map C C Star Slits RA Dec (J2000) Mag range Source
--------------------------------------------------------------------
1 SgrB2_14 M F 4 8 17 47 32.41 -28 22 29.8 16.0-22.8 #500
2 SgrB2_16 M F 4 11 17 47 6.63 -28 47 19.8 20.4-22.2
3 SgrB2_15 M F 4 9 17 47 15.73 -28 41 9.8 18.5-22.6
--------------------------------------------------------------------
Total sources:226; Chandra sources:160; Ha sources:67; Chandra sources with Ha:1 (source 500 on mask SgrB2_14)
Here is a list of magnitudes of all the objects covered by the masks.
Mask maps are 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-left & N-up) 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.
Nine multi-slit masks were cut to cover 94 sources in the SgrA*
field. 86 of them are X-ray sources; 10 are Ha sources. Two of them, source 510 on mask SgrA5 and source 10 on mask SgrA6 (observed),
are Chandra sources with Ha emission. Some sources are covered by two masks. 6 of the 9 masks were observed in may 2001. Three
unobserved masks are listed below.
SgrA* Field Mask List
Mask PA = 270 degree (Slits are East-west)
Mask M F Algn N of Telescope Pointing X-Ha
Pri Map C C Star Slits RA Dec (J2000) Mag range Source
--------------------------------------------------------------------
1 SgrA5 M F 3 9 17 45 4.93 -29 01 39.2 17.0-22.4 #510
2 SgrA8 M F 3 8 17 45 59.06 -29 07 59.2 15.1-23.8
3 SgrA9 M F 4 5 17 47 9.96 -28 42 4.9 18.6-21.7
--------------------------------------------------------------------
Total sources: 94; Chandra sources: 84; Ha sources: 10; Chandra sources with Ha: 2 (sources 510 on mask SgrA5 and 10 on SgrA6)
Here is a list of magnitudes of all the objects covered by the masks.
Mask maps are 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', E-left & N-up) 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.
XTE J1901+014 is a new (very fast) X-ray transient (IAUC 7880) that
went outburst in April 2002. We have found a potential optical
counterpart with orbital period about 3hrs or about 6 hrs. It is the
Candidate B:
19:01:52.71 +1:26:01.6 (J2000) in this finding chart. It has mag
of R ~ 19.3.
On the first good night of the run, please take 10-min spectra of
J1901 Candidate B continuously for at least 3 hours (6 hours is
strongly preferred); take 1 henear spectrum after every pair of object
spectra. Please use the Boller and Chivens Spectrograph (B&C),
Grating: 1200/5000, Grating Angle: 23.0, and no Blocking Filter.
It takes about 15 min to switch the instrument from LDSS2 to B&C.
The astronomical twilight on June 16-19, 2002 is 10hr57m. So we can
spend about 2hrs on each field (including overhead time).
In the afternoon:
1. Mount the masks (6 mask + one single slit).
2. Take an image for each mask and single slit (without grism).
This image is need to align the mask when observing.
3. Take Biases.
4. Take Domeflats (mask or slit with med/glue grism, also take with
high grism if plan to use it).
5. Take Biases and Domeflats with B&C if plan to do J1901 that night.
Observing (for each field)
1. First take an image of the field through open slot (no mask).
2. After identifying the field, take an image of the field with mask
(no grism).
3. Starting taking spectra (mask with grism) when objects are in
the slits. Take 3-5 spectra per field of 20-30 mins each.
4. Take HeNeAr Lamp immediately after each spectrum.
5. Take a few flux standards if it's photometric.
Here is an observing elevation chart showing the locus of targets
during the night. Horizontal axis is the time in hours. Space
between two gray bars are the astronomical twilight zone. Vertical
axis is the distance of the object above horizon in 10-degrees. From
left to right are J1655 G347b GalCA SgrB2 SgrA* and J1901.
postscript and txt
Here is an observing almanac made for this run.
Here is an observing log of our Magellan run in July 2001.
Ping Zhao: zhao@cfa.harvard.edu
