HMXB and SFXT Charts for AAVSO Observers

This is not an official AAVSO page.

The original HMXB observing project is described in our JAAVSO article: you can read the e-JAAVSO version or the astro-ph version . The "LPH" numbers are defined in the JAAVSO article, they refer to the old HMXB catalog by Liu, van Paradijs and van den Heuvel. The latest HMXB catalogs split the Magellanic Cloud HMXBs from those in the Milky Way.

In 2011, the HMXB observing program has been extended to include the challenging Super Fast X-ray Transients (SFXTs), a new type of HMXB identified in INTEGRAL data. The SFXT project is also described in a JAAVSO article: see the eJAAVSO posting.

The charts posted here are for reference - the old ones (with links on the LPH numbers) name comparison stars with a consistent set of letters that observers have reported prior to circa 2011, they also recommend which comparison stars to use. The old charts typically consist of two pages, meant to be printed double-sided. That way the front is the most useful side with information on the back being useful in case there are problems with the sequence printed on the front. Since this HMXB/SFXT project began, the AAVSO VSP chart plotter has come on-line. The VSP uses the latest available data for comparison stars, so it is recommended that comparison star magnitudes from the VSP be used where they differ from the charts posted here. VSP charts can now be generated for all the LPH HMXBs in this project, listed below, thanks to Keith Graham, Sebastian Otero and Tim Crawford with their fantastic work on defining comparison star sequences in the HMXB fields. The SFXT charts posted here were also made using the VSP and are posted here as a convenient reference.

Notes on data submission

There are some old charts posted here (links on the LPH numbers) that have comparison star magnitudes based on my all-sky photometry with the ANU 24 and 40 inch telescopes. Some of that photometry is rough due to limited observing time and non-ideal observing conditions. The data from APASS project is now available in the VSP so use the comparison star data from the VSP database.

Please submit your data directly to the AAVSO. Please note the chart revision date and comparison star used when submitting data.

The Charts

(SMC = Small Magellanic Cloud, LMC = Large Magellanic Cloud.) Thanks to Keith Graham and Sebastian Otero for sorting out APASS comp star data in the HMXB fields in the AAVSO VSP database, sorting out AAVSO AUIDs and generally working to make useable charts for the HMXBs in the VSP. The latest VSP charts can be searched on the AAVSO VSP using the LPHXXX numbers. It is recommended that you generate your own VSP charts instead of using the ones on this page since the ones here may not be optimal for your particular equipment set-up. Note that some of the HMXBs in the VSP are classified as GCAS stars. They are not. For info on the gamma Cas stars from an HMXB point-of-view, see: Lopes de Oliveira R, Motch C, Haberl F, Negueruela I, Janot-Pacheco E, "New gamma Cassiopeiae-like objects: X-ray and optical observations of SAO 49725 and HD 161103", Astronomy and Astrophysics, 454, 265-276 (2006).

Star Chart and Notes
LPH001 In SMC. RA: 00:32:56.100, Dec: -73:48:19.00. RX J0032.9-7348. V = 15.3 (from LPH catalog, but this may include a nearby star, the 15.6 comp in the VSP chart). VSP version.
LPH004 AUID 000-BJP-525; SMC X-3. Orbital period now known to be 44.86 days. (SSO standards.) Latest non-VSP revision: [2009-09-07]. VSP version.
LPH008 In SMC. RA: 00:51:52.29, Dec: -73:10:33.4. RX J0051.9-7311. V = 14.4. VSP version.
LPH009 In SMC. The original coordinates from LPH are RA: 00:52:13.90, Dec: -73:19:13.0 for RX J0052.1-7319, SMC SC6 99923. V = 14.667. However, there appear to be two HMXBs at this location for which charts can be made in VSP (these are the names to type into VSP): RX J0052.1-7319 A (V = 14.4, orbital period reported as 75.1 d) and RX J0052.1-7319 B (V = 15.6, orbital period reported as 21.68 d).
LPH010 In SMC. RA: 00:52:59.20, Dec: -71:57:58.0. RX J0052.9-7158. V = 15.46. VSP version.
LPH011 In SMC. RA: 00:54:36.20, Dec: -73:40:35.0. H 0053-739. V = 16.0. This is SMC X-2, you will need this finding chart from Figure 1 of Clark, Doxsey, Li, Jernigan, J van Paradijs, ApJ, 221, L37-L41, 1978. LPH011 (SMC X-2) is star 5 in the finding chart image. VSP version.
LPH012 AUID 000-BCY-660; old AAVSO designation 0050+60. gamma Cas - this star has been on the AAVSO photoelectric program for many years. You can use its VSP version. Its orbital period is now known at 203.59 days.
LPH017 In SMC. RA: 00:58:11.70, Dec: -72:30:50.0. RX J0058.2-7231. V = 14.9. VSP version. Orbital period is now listed as 59.72 d in Magellenic Cloud LPH catalog.
LPH018 In SMC. RA: 00:59:11.30, Dec: -71:38:45.0. RX J0059.2-7138. V = 14.1. VSP version.
LPH020 In SMC. RA: 01:03:13.90, Dec: -72:09:14.0. RX J0103-722. V = 14.8. You may need this H-alpha image from Hughes and Smith, ApJ, 107, 1363-1370, 1994 to ID the star. This HMXB is associated with the SNR 0101-724. VSP version
LPH021 In SMC. RA: 01:09:15.00, Dec: -74:44:40.0. 1H0103-762. V = 17.0. VSP version.
LPH023 In SMC. RA: 01:06:15.10, Dec: -72:05:25.0. RX J0106.2-7205. V = 16.7. This H-alpha image from Hughes and Smith, ApJ, 107, 1363-1370, 1994 IDs the suspected star. This X-ray source is associated with the SNR 0104-72.3. According to Jae-Joon et al.. ApJ 731, L8 (2011) this source is not an HMXB. It is therefore no longer a part of this HMXB observing program.
LPH024 In SMC. RA: 01:11:08.40, Dec: -73:16:46.0. XTE J0111.2-7317. V = 15.32. VSP version.
LPH028 In SMC. RA: 01:17:41.40, Dec: -73:30:49.0. RX J0117.6-7330. V = 14.19. VSP version.
LPH029 AUID 000-BCY-758; old AAVSO Harvard designation 0140+60B; AAVSO name V831 Cas. Other names: LS I+61^o235, RX J0146.9+6121. Latest revision: [2009-09-07]. VSP version.
LPH033 AUID 000-BBG-820; AAVSO designation 0411+55. CI Cam - this star has been on the AAVSO program for many years. You can use its VSP version chart. Its orbital period is now known at 19.41 days.
LPH034 AUID 000-BCZ-082; old AAVSO designation 0434+41. Other names: BSD 24-491, RX J0440.9+4431. Latest revision: [2009-09-07]. VSP version.
LPH035 In LMC. RA: 05:01:23.90, Dec: -70:33:33.0. RX J0501.6-7034. V = 14.5. VSP version. Note from Keith and Sebastian (June 29, 2012): "Zaritsky shows 2 components for this object, one component being an apparent red giant. The ESO.B MAMA 8969 image shows this target to be only 1 object, and the surveys I used (UCAC#, PPMXL, SMASS, and USNOB1.0) all show only 1 object for this position. Sebastian picked up the double component when he saw the f mags for the 2 Zaritsky components as 16.52 and 14.98. The paper gives a mean V mag as 14.5." These components are so close as to most certainly be unseparable using amateur equipment, so the best strategy is to report the combined magnitude assuming that the non-HMXB is constant.
LPH036 In LMC. RA: 05:02:51.60, Dec: -66:26:25.0. RX J0502.9-6626. V = 14.22. VSP version.
LPH038 In LMC. RA: 05:16:00.10, Dec: -69:16:09.0. RX J0516.0-6916. V = 15.0. VSP version.
LPH039 In LMC. RA: 05:20:30.30, Dec: -69:32:04.0. RX J0520.5-6932. V = 14.4. VSP version. Orbital period is now listed as 24.4 d in Magellenic Cloud LPH catalog.
LPH040 AUID 000-BCT-897; old AAVSO designation 0515+37. Other names: V420 Aur, 0521+373, HD 34921, EXO 051910+3737.7. Latest revision: [2009-09-07]. VSP version.
LPH046 AUID 000-BJP-526; RX J0532.5-6551. In LMC. Latest revision: [2009-09-07] VSP version.
LPH053 AUID 000-BJP-527; RX J0541.4-6936. In LMC. Latest revision: [2009-09-07] VSP version.
LPH054 In LMC. RA: 05:41:37.10, Dec: -68:32:32.0. RX J0541.5-6833, LMC BI267. V = 14.02. VSP version.
LPH055 In LMC. RA: 05:44:15.60, Dec: -66:34:59.0. H 0544-665. V = 15.4. VSP version.
LPH056 In LMC. RA: 05:44:06.30, Dec: -71:00:50.0. 1SAX J0544.1-7100. V = 15.33. VSP version. Orbital period is now listed as 286 d in Magellenic Cloud LPH catalog.
LPH057 AUID 000-BCZ-340; old AAVSO designation 0549+28B. Other names: HD 249179, 1H 0556+286. Latest revision: [2009-09-07]. VSP version.
LPH058 AUID 000-BCZ-435; old AAVSO designation 0630+05B. Other names: SAX J0635+0533. Latest revision: [2009-09-07]. VSP version.
LPH061 RA: 07:47:23.60, Dec: -53:19:57.0. 1H 0739-529, HD63666. V = 7.62. VSP version.
LPH062 RA: 07:50:15.77, Dec: -61:05:58.2. 1H 0749-600, HD65663. V = 6.73. VSP version.
LPH067 AUID 000-BJP-528. Southern object, 1024.0-5732 = Wack 2134 = GSC 08608-00157. May not be HMXB, may be WR + O star. Not listed in Liu, QZ, van Paradijs J, van den Heuvel EPJ, A&A, 455:1165-1168 (2006). (SSO standards.) Latest revision: [2009-09-07]. VSP version.
LPH069 AUID 000-BCZ-878. Southern HMXB. RX J1037.5-5647 = LS 1698. (SSO standards.) Latest revision: [2009-12-03]. VSP version.
LPH071 AUID 000-BJP-400; NSV 18753; 1A 1118-615. Southern HMXB. (SSO standards.) Latest revision: [2009-09-06]. VSP version.
LPH079 RA: 12:42:50.30, Dec: -63:03:31.0. 1H 1249-637, HD110432. V = 5.31. VSP version.
LPH080 RA: 12:39:14.60. Dec: -75:22:14.0. 1H 1253-761, HD109857. V = 6.49. VSP version.
LPH081 RA: 12:54:36.90, Dec: -57:10:07.0. 1H 1255-567, mu2 Cru. V = 5.17. VSP version.
LPH088 AUID 000-BJP-529. Southern HMXB. 1H 1555-552 = SAO 243098 = HD 141926. (SSO standards.) Latest revision: [2009-12-04]. VSP version.
LPH095 AUID 000-BCX-089. Southern HMXB. RX J1744.7-2713 = HD 161103 = V3892 SGR = old AAVSO 1738-27 = SAO 185681. Latest revision: [2009-09-07]. VSP version.
LPH100 AUID 000-BDB-845; old AAVSO designation 1820-14. Other names: LS 5039, RX J1826.2-1450, V479 Sct. Latest revision: [2009-09-07]. VSP version.
LPH107 AUID 000-BJP-573. Southern HMXB. AX 1845.0-0433. (SSO standards.) Latest revision: [2009-09-07]. VSP version.
LPH115 AUID 000-BDC-070; old AAVSO Harvard designation 1930+53. Other names: 1H 1936+541, DM+53^o2262. Latest revision: [2009-09-07]. VSP version.
LPH117 RA: 19:49:30.50, Dec: +30:12:24.0. KS 1947+300. V = 14.24. Orbital period listed as 14.4d in the Milky Way LPH catalog. VSP version.
LPH123 AUID 000-BDC-306; old AAVSO designation 2027+47. Other names: RX J2030.5+4751, SAO 49725. Latest revision: [2009-09-07]. VSP version.
LPH127 AUID 000-BFS-469; old AAVSO designation 2157+49. Other names: 1H 2202+501, SAO 51568, V2175 Cyg. Latest revision: [2009-09-07]. VSP version.
LPH128 AUID 000-BDC-531; old AAVSO Harvard designation 2204+54; AAVSO name 2206+543. Other names: 4U 2206+543, TYC 3973-812-1, GSC 3973-0812. Latest revision: [2010-01-18]. VSP version.
LPH129 AUID 000-BDC-567; old AAVSO designation 2223+60. Other names: V669 Cep, 2214+589, GG3 71, IRAS 22248+6058. May not be an HMXB - low priority object. Latest revision: [2009-09-07]. VSP version.

Star	Chart and Notes
LPH001	In SMC. RA: 00:32:56.100, Dec: -73:48:19.00. RX J0032.9-7348. V = 15.3 (from LPH catalog, but this may include a nearby star, the 15.6 comp in the VSP chart). VSP version.
LPH004	AUID 000-BJP-525; SMC X-3. Orbital period now known to be 44.86 days. (SSO standards.) Latest non-VSP revision: [2009-09-07]. VSP version.
LPH008	In SMC. RA: 00:51:52.29, Dec: -73:10:33.4. RX J0051.9-7311. V = 14.4. VSP version.
LPH009	In SMC. The original coordinates from LPH are RA: 00:52:13.90, Dec: -73:19:13.0 for RX J0052.1-7319, SMC SC6 99923. V = 14.667. However, there appear to be two HMXBs at this location for which charts can be made in VSP (these are the names to type into VSP): RX J0052.1-7319 A (V = 14.4, orbital period reported as 75.1 d) and RX J0052.1-7319 B (V = 15.6, orbital period reported as 21.68 d).
LPH010	In SMC. RA: 00:52:59.20, Dec: -71:57:58.0. RX J0052.9-7158. V = 15.46. VSP version.
LPH011	In SMC. RA: 00:54:36.20, Dec: -73:40:35.0. H 0053-739. V = 16.0. This is SMC X-2, you will need this finding chart from Figure 1 of Clark, Doxsey, Li, Jernigan, J van Paradijs, ApJ, 221, L37-L41, 1978. LPH011 (SMC X-2) is star 5 in the finding chart image. VSP version.
LPH012	AUID 000-BCY-660; old AAVSO designation 0050+60. gamma Cas - this star has been on the AAVSO photoelectric program for many years. You can use its VSP version. Its orbital period is now known at 203.59 days.
LPH017	In SMC. RA: 00:58:11.70, Dec: -72:30:50.0. RX J0058.2-7231. V = 14.9. VSP version. Orbital period is now listed as 59.72 d in Magellenic Cloud LPH catalog.
LPH018	In SMC. RA: 00:59:11.30, Dec: -71:38:45.0. RX J0059.2-7138. V = 14.1. VSP version.
LPH020	In SMC. RA: 01:03:13.90, Dec: -72:09:14.0. RX J0103-722. V = 14.8. You may need this H-alpha image from Hughes and Smith, ApJ, 107, 1363-1370, 1994 to ID the star. This HMXB is associated with the SNR 0101-724. VSP version
LPH021	In SMC. RA: 01:09:15.00, Dec: -74:44:40.0. 1H0103-762. V = 17.0. VSP version.
LPH023	In SMC. RA: 01:06:15.10, Dec: -72:05:25.0. RX J0106.2-7205. V = 16.7. This H-alpha image from Hughes and Smith, ApJ, 107, 1363-1370, 1994 IDs the suspected star. This X-ray source is associated with the SNR 0104-72.3. According to Jae-Joon et al.. ApJ 731, L8 (2011) this source is not an HMXB. It is therefore no longer a part of this HMXB observing program.
LPH024	In SMC. RA: 01:11:08.40, Dec: -73:16:46.0. XTE J0111.2-7317. V = 15.32. VSP version.
LPH028	In SMC. RA: 01:17:41.40, Dec: -73:30:49.0. RX J0117.6-7330. V = 14.19. VSP version.
LPH029	AUID 000-BCY-758; old AAVSO Harvard designation 0140+60B; AAVSO name V831 Cas. Other names: LS I+61^o235, RX J0146.9+6121. Latest revision: [2009-09-07]. VSP version.
LPH033	AUID 000-BBG-820; AAVSO designation 0411+55. CI Cam - this star has been on the AAVSO program for many years. You can use its VSP version chart. Its orbital period is now known at 19.41 days.
LPH034	AUID 000-BCZ-082; old AAVSO designation 0434+41. Other names: BSD 24-491, RX J0440.9+4431. Latest revision: [2009-09-07]. VSP version.
LPH035	In LMC. RA: 05:01:23.90, Dec: -70:33:33.0. RX J0501.6-7034. V = 14.5. VSP version. Note from Keith and Sebastian (June 29, 2012): "Zaritsky shows 2 components for this object, one component being an apparent red giant. The ESO.B MAMA 8969 image shows this target to be only 1 object, and the surveys I used (UCAC#, PPMXL, SMASS, and USNOB1.0) all show only 1 object for this position. Sebastian picked up the double component when he saw the f mags for the 2 Zaritsky components as 16.52 and 14.98. The paper gives a mean V mag as 14.5." These components are so close as to most certainly be unseparable using amateur equipment, so the best strategy is to report the combined magnitude assuming that the non-HMXB is constant.
LPH036	In LMC. RA: 05:02:51.60, Dec: -66:26:25.0. RX J0502.9-6626. V = 14.22. VSP version.
LPH038	In LMC. RA: 05:16:00.10, Dec: -69:16:09.0. RX J0516.0-6916. V = 15.0. VSP version.
LPH039	In LMC. RA: 05:20:30.30, Dec: -69:32:04.0. RX J0520.5-6932. V = 14.4. VSP version. Orbital period is now listed as 24.4 d in Magellenic Cloud LPH catalog.
LPH040	AUID 000-BCT-897; old AAVSO designation 0515+37. Other names: V420 Aur, 0521+373, HD 34921, EXO 051910+3737.7. Latest revision: [2009-09-07]. VSP version.
LPH046	AUID 000-BJP-526; RX J0532.5-6551. In LMC. Latest revision: [2009-09-07] VSP version.
LPH053	AUID 000-BJP-527; RX J0541.4-6936. In LMC. Latest revision: [2009-09-07] VSP version.
LPH054	In LMC. RA: 05:41:37.10, Dec: -68:32:32.0. RX J0541.5-6833, LMC BI267. V = 14.02. VSP version.
LPH055	In LMC. RA: 05:44:15.60, Dec: -66:34:59.0. H 0544-665. V = 15.4. VSP version.
LPH056	In LMC. RA: 05:44:06.30, Dec: -71:00:50.0. 1SAX J0544.1-7100. V = 15.33. VSP version. Orbital period is now listed as 286 d in Magellenic Cloud LPH catalog.
LPH057	AUID 000-BCZ-340; old AAVSO designation 0549+28B. Other names: HD 249179, 1H 0556+286. Latest revision: [2009-09-07]. VSP version.
LPH058	AUID 000-BCZ-435; old AAVSO designation 0630+05B. Other names: SAX J0635+0533. Latest revision: [2009-09-07]. VSP version.
LPH061	RA: 07:47:23.60, Dec: -53:19:57.0. 1H 0739-529, HD63666. V = 7.62. VSP version.
LPH062	RA: 07:50:15.77, Dec: -61:05:58.2. 1H 0749-600, HD65663. V = 6.73. VSP version.
LPH067	AUID 000-BJP-528. Southern object, 1024.0-5732 = Wack 2134 = GSC 08608-00157. May not be HMXB, may be WR + O star. Not listed in Liu, QZ, van Paradijs J, van den Heuvel EPJ, A&A, 455:1165-1168 (2006). (SSO standards.) Latest revision: [2009-09-07]. VSP version.
LPH069	AUID 000-BCZ-878. Southern HMXB. RX J1037.5-5647 = LS 1698. (SSO standards.) Latest revision: [2009-12-03]. VSP version.
LPH071	AUID 000-BJP-400; NSV 18753; 1A 1118-615. Southern HMXB. (SSO standards.) Latest revision: [2009-09-06]. VSP version.
LPH079	RA: 12:42:50.30, Dec: -63:03:31.0. 1H 1249-637, HD110432. V = 5.31. VSP version.
LPH080	RA: 12:39:14.60. Dec: -75:22:14.0. 1H 1253-761, HD109857. V = 6.49. VSP version.
LPH081	RA: 12:54:36.90, Dec: -57:10:07.0. 1H 1255-567, mu2 Cru. V = 5.17. VSP version.
LPH088	AUID 000-BJP-529. Southern HMXB. 1H 1555-552 = SAO 243098 = HD 141926. (SSO standards.) Latest revision: [2009-12-04]. VSP version.
LPH095	AUID 000-BCX-089. Southern HMXB. RX J1744.7-2713 = HD 161103 = V3892 SGR = old AAVSO 1738-27 = SAO 185681. Latest revision: [2009-09-07]. VSP version.
LPH100	AUID 000-BDB-845; old AAVSO designation 1820-14. Other names: LS 5039, RX J1826.2-1450, V479 Sct. Latest revision: [2009-09-07]. VSP version.
LPH107	AUID 000-BJP-573. Southern HMXB. AX 1845.0-0433. (SSO standards.) Latest revision: [2009-09-07]. VSP version.
LPH115	AUID 000-BDC-070; old AAVSO Harvard designation 1930+53. Other names: 1H 1936+541, DM+53^o2262. Latest revision: [2009-09-07]. VSP version.
LPH117	RA: 19:49:30.50, Dec: +30:12:24.0. KS 1947+300. V = 14.24. Orbital period listed as 14.4d in the Milky Way LPH catalog. VSP version.
LPH123	AUID 000-BDC-306; old AAVSO designation 2027+47. Other names: RX J2030.5+4751, SAO 49725. Latest revision: [2009-09-07]. VSP version.
LPH127	AUID 000-BFS-469; old AAVSO designation 2157+49. Other names: 1H 2202+501, SAO 51568, V2175 Cyg. Latest revision: [2009-09-07]. VSP version.
LPH128	AUID 000-BDC-531; old AAVSO Harvard designation 2204+54; AAVSO name 2206+543. Other names: 4U 2206+543, TYC 3973-812-1, GSC 3973-0812. Latest revision: [2010-01-18]. VSP version.
LPH129	AUID 000-BDC-567; old AAVSO designation 2223+60. Other names: V669 Cep, 2214+589, GG3 71, IRAS 22248+6058. May not be an HMXB - low priority object. Latest revision: [2009-09-07]. VSP version.

SFXT charts will be posted here as the field photometry becomes available. You may be able to plot better charts than I can with the AAVSO VSP (use the star coords as given in our SFXT project paper. Many thanks to Tim Crawford for his hard work at getting the data into the AAVSO VSP.

SFXT Charts	V	I	K
IGR J08408-4503 SARTY101026 LM Vel chart	7.6	?	6.8
IGR J16195-4945	17.2	15.5	11.0
IGR J16207-5129	17.7	13.6	9.2
IGR J16318-4848	21.1	16.1	7.6
IGR J16358-4726	?	12.6	?
IGR J16465-4507	?	?	9.8
IGR J16479-4514	20.4	?	9.8
IGR J17354-3255	?	?	10.3
XTE J1739-302	14.9	11.4	7.4
IGR J17407-2808	?	?	?
XTE J1743-363	?	?	7.6
IGR J17544-2619	12.7	?	8.0
SAX J1818.6-1703	?	?	7.9
AX J1820.5-1434	?	?	?
AX J1841.0-0536	?	?	8.9
AX J1845.0-0433	14.0	11.4	8.9
IGR J18483-0311	21.9	15.3	8.6

Professional and Space Telescope Observing Runs. The data that you have submitted to the AAVSO have been extremely useful complements for the following observing runs:

SSO_2005_08: G. Sarty, 40-in/WFI, Siding Spring, Australia, August 22 - September 5, 2005.
SSO_2006_03: G. Sarty, 24-in/CCD Imager, Siding Spring, Australia, March 23 - April 1, 2006.
SSO_2006_07: G. Sarty, L. Kiss, 40-in/WFI, K. Wu, 2.3-m CASPIR, Siding Spring, Australia, July 17 - July 24, 2006.
DAO_2007_04: G. Sarty, R. Huziak, D. Luciuk, 72-in/spectroscope, DAO, Victoria, Canada, April 24 - May 2, 2007.
SSO_2007_07: G. Sarty, 40-in/WFI, Siding Spring, Australia, July 13 - July 28, 2007.
DAO_2007_08: D. Luciuk, 72-in/spectroscope DAO, Victoria, Canada, August 20 - September 3, 2007.
DAO_2007_12: R. Huziak, T. Crawford, 72-in/spectroscope DAO, Victoria, Canada, December 3 - December 12, 2007.
DAO_2008_05: N. Johnson, G. Sarty, D. Balam DAO, Victoria, Canada, 72-in/spectroscope, May 14-26, 2008.
DAO_2008_08: D. Luciuk, 72-in/spectroscope DAO, Victoria, Canada, August 14 -21, 2008; D. Bohlender, September 18-21, 2008
DAO_2008_10: T. Crawford and D. Balam, 72-in/spectroscope DAO, Victoria, Canada, October 29 - November 9, 2008.
DAO_2009_01: D. Balam, 72-in/spectroscope DAO, Victoria, Canada, January 6 - January 18, 2009.
DAO_2009_05: N. Johnson, D. Balam, 72-in/spectroscope DAO, Victoria, Canada, May 29 - June 11, 2009.
SSO_2009_07: L. Kiss and T. Szalai, 2.3-m/Echelle spectrometer, Siding Spring, Australia, July 8 - July 13, 2009.
MOST_2009: MOST Canadian Space Telescope, July 7 - July 27, 2009.
DAO_2009_08: N. Johnson, 72-in/spectroscope DAO, Victoria, Canada, July 31 - August 11, 2009.
Spitzer2009: Spitzer IR Space Telescope, 12.5 hours 2009-2010.
DAO_2009_11: D. Balam, 72-in/spectroscope DAO, Victoria, Canada, November 9 - 11, November 23 - 29, December 7 - 10, 2009.
DAO_2010_01: D. Balam, 72-in/spectroscope DAO, Victoria, Canada, January 4 - 7, January 22 - 31, 2010.
DAO_2010_05: D. Balam, 72-in/spectroscope DAO, Victoria, Canada, May 21 -27, June 24 - 30, 2010.
DAO_2010_07: D. Balam, 72-in/spectroscope DAO, Victoria, Canada, July 1, July 29 - August 2, August 25 - 29, September 22-23, 2010.
OMM_2011: "Dust in the V420 Aur X-ray Binary System", Observatoire du mont Megantic, Quebec, Canada, Queued observations, 2010-2011.
DAO_2010_10: D. Balam, 72-in/spectroscope DAO, Victoria, Canada, October 20-24, November 15-18, December 19-23, 2010.
REM_2011: "Searching for Orbital Periods of Supergiant Fast X-ray Transients", INAF REM robotic telescope, La Silla, Chile, 85 hours, ID 23071, AOT-23, 2011.

Publications. The data you have submitted to the AAVSO have, directly and indirectly, made possible the following publications on HMXBs:

G.E. Sarty, L.L. Kiss, R. Huziak, L.J.J. Catalan, D. Luciuk, T.R. Crawford, D.J. Lane, R.D. Pickard, T.A. Grzybowski, P. Closas, H. Johnston, D. Balam, K. Wu, "Periodicities in the high-mass X-ray binary system RX J0146.9+6121/LS I+61 235", Monthly Notices of the Royal Astronomical Society, 392, 1242-1252, 2009.
G.E. Sarty, T. Szalai, L.L. Kiss, J.M. Matthews, K. Wu, R. Kuschnig, D.B. Guenther, A.F.J. Moffat, S.M. Rucinski, D. Sasselov, W.W. Weiss, R. Huziak, H.M. Johnston, A. Phillips, M.C.B. Ashley, "The gamma-ray binary LS 5039: mass and orbit constraints from MOST observations", Monthly Notices of the Royal Astronomical Society, 411, 1293-1300, 2011.
G.E. Sarty, B. Pilecki, D.E. Reichart, K.M. Ivarsen, J.B. Haislip, M.C. Nysewande, A.P. LaCluyze, H.M. Johnston, R.R. Shobbrook, L.L. Kiss, K. Wu, "Photometric Observations of Three High Mass X-Ray Binaries and a Search for Variations Induced by Orbital Motion", Research in Astronomy and Astrophysics, 11, 947-964, 2011.

Acknowledgements: The finder charts were made using the POSS2/UKSTU Red images from the STScI Digitized Sky Survey. The Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions.

The National Geographic Society - Palomar Observatory Sky Atlas (POSS-I) was made by the California Institute of Technology with grants from the National Geographic Society.

The Second Palomar Observatory Sky Survey (POSS-II) was made by the California Institute of Technology with funds from the National Science Foundation, the National Geographic Society, the Sloan Foundation, the Samuel Oschin Foundation, and the Eastman Kodak Corporation.

The Oschin Schmidt Telescope is operated by the California Institute of Technology and Palomar Observatory.

The UK Schmidt Telescope was operated by the Royal Observatory Edinburgh, with funding from the UK Science and Engineering Research Council (later the UK Particle Physics and Astronomy Research Council), until 1988 June, and thereafter by the Anglo-Australian Observatory. The blue plates of the southern Sky Atlas and its Equatorial Extension (together known as the SERC-J), as well as the Equatorial Red (ER), and the Second Epoch [red] Survey (SES) were all taken with the UK Schmidt.

All data are subject to the copyright given in the copyright summary. Copyright information specific to individual plates is provided in the downloaded FITS headers.

Supplemental funding for sky-survey work at the ST ScI is provided by the European Southern Observatory.