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.
(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+61o235, 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+53o2262. 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.
SARTY101026 LM Vel chart
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.
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