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[vsnet-campaign-data 99] Observations of V4740 Sgr, 20020714
PHOTOMETRY OF V4740 SGR, 2002-07-14 UTC
WOODRIDGE OBSERVATORY
180mm refr @ f/9,
SBIG ST7e CCD camera, binned 1x1.
Images Exptime=120s, Clear filter, flat-fielded & dark-subtracted.
33 images used, 09:43:31-11:20:07 (1 hr 36m)
Comp star = GSC 7392:2893, GSC mag = 11.06
Sigma on var=0.021 mag.
The plot shows a hump of amplitude ~0.04 mag, and 4 deep and steep drops
of ~0.1 mag at irregular intervals of ~0.02d.
Dr Thomas J. (Tom) Richards, FRAS
Woodridge Observatory
8 Diosma Rd, Eltham, Vic 3095, Australia.
Tel +61(0)3 9431-1072, Fax +61(0)3 9840-1500
www.WoodridgeObsy.org
Carpe noctem!
DATA IN AIP4WIN FORMAT:
AIP4Win Multi-Image Photometry Tool
Analysis of 34 images from directory: D:\Astronomy\Imaging\2002-07-14
V4740 Sgr\Reduced Raws
Radius of star diaphragm: 6
Sky annulus inner radius: 9
Sky annulus outer Radius: 15
Search Radius: 6
Initial Comparison Star coords: X=274.64, Y=170.14
Initial Variable Star coords: X=326.28, Y=274.74
Initial Check Star coords: X=207.09, Y=389.33
Image time = time in FITS file header or log file.
JD calculated from image time plus half of exposure duration.
JD time zone correction added = 0 hours.
JD user correction (True - Log) applied = 0 seconds.
JD heliocentric correction added = 0 seconds.
Image Date Time Exp ADU Com ADU
Sky ADU Var V-C mag ADU Chk K-C mag Julian Day
V4740 SGR-001C.REDUCED.FIT 2002-07-14 09:43:31 120 535492.9
433.7 21948.4 3.468 231658.3 0.910 2452469.90591435
V4740 SGR-002C.REDUCED.FIT 2002-07-14 09:45:49 120 538163.6
433.9 21376.3 3.502 234128.4 0.904 2452469.90751157
V4740 SGR-003C.REDUCED.FIT 2002-07-14 09:48:07 120 533907.1
418.6 22689.7 3.429 233643.6 0.897 2452469.9091088
V4740 SGR-004C.REDUCED.FIT 2002-07-14 09:50:25 120 538706.1
423.2 21953.5 3.475 234155.2 0.905 2452469.91070602
V4740 SGR-006C.REDUCED.FIT 2002-07-14 09:55:01 120 535276.4
416.2 22540.9 3.439 234039.2 0.898 2452469.91390046
V4740 SGR-007C.REDUCED.FIT 2002-07-14 09:57:19 120 533434.4
406.1 22490.6 3.438 234551.8 0.892 2452469.91549769
V4740 SGR-009C.REDUCED.FIT 2002-07-14 10:01:55 120 541091.4
409.4 22934.6 3.432 234362.1 0.908 2452469.91869213
V4740 SGR-010C.REDUCED.FIT 2002-07-14 10:04:13 120 530867.8
406.2 22822.8 3.417 237191.9 0.875 2452469.92028935
V4740 SGR-011C.REDUCED.FIT 2002-07-14 10:06:31 120 543321.5
412.0 22862.6 3.440 234881.6 0.911 2452469.92188657
V4740 SGR-012C.REDUCED.FIT 2002-07-14 10:08:49 120 547372.8
402.6 21588.5 3.510 236164.5 0.913 2452469.9234838
V4740 SGR-013C.REDUCED.FIT 2002-07-14 10:11:07 120 545784.4
398.8 22766.5 3.449 237184.7 0.905 2452469.92508102
V4740 SGR-014C.REDUCED.FIT 2002-07-14 10:13:25 120 535161.2
393.5 23380.2 3.399 239083.2 0.875 2452469.92667824
V4740 SGR-015C.REDUCED.FIT 2002-07-14 10:15:43 120 546090.7
398.1 22355.2 3.470 238935.4 0.897 2452469.92827546
V4740 SGR-017C.REDUCED.FIT 2002-07-14 10:20:19 120 536541.8
388.3 23941.5 3.376 238882.6 0.879 2452469.93146991
V4740 SGR-018C.REDUCED.FIT 2002-07-14 10:22:37 120 543267.5
393.4 23289.3 3.420 239895.1 0.887 2452469.93306713
V4740 SGR-020C.REDUCED.FIT 2002-07-14 10:27:13 120 548557.9
390.6 23852.0 3.404 240209.9 0.897 2452469.93626157
V4740 SGR-021C.REDUCED.FIT 2002-07-14 10:29:31 120 538502.1
383.2 23174.9 3.415 241269.5 0.872 2452469.9378588
V4740 SGR-023C.REDUCED.FIT 2002-07-14 10:34:07 120 551720.6
376.5 24045.0 3.402 238778.1 0.909 2452469.94105324
V4740 SGR-024C.REDUCED.FIT 2002-07-14 10:36:25 120 537976.7
373.1 23479.6 3.400 242461.1 0.865 2452469.94265046
V4740 SGR-025C.REDUCED.FIT 2002-07-14 10:38:43 120 540247.3
372.2 23510.3 3.403 241222.1 0.875 2452469.94424769
V4740 SGR-026C.REDUCED.FIT 2002-07-14 10:41:01 120 552630.9
373.4 22984.8 3.452 241627.7 0.898 2452469.94584491
V4740 SGR-027C.REDUCED.FIT 2002-07-14 10:43:19 120 557589.9
375.8 21951.5 3.512 238921.3 0.920 2452469.94744213
V4740 SGR-028C.REDUCED.FIT 2002-07-14 10:45:37 120 542943.2
373.3 22911.6 3.437 241448.3 0.880 2452469.94903935
V4740 SGR-029C.REDUCED.FIT 2002-07-14 10:47:55 120 550632.3
371.9 22839.1 3.455 241370.2 0.895 2452469.95063657
V4740 SGR-031C.REDUCED.FIT 2002-07-14 10:52:31 120 550132.7
356.2 23401.6 3.428 242580.4 0.889 2452469.95383102
V4740 SGR-032C.REDUCED.FIT 2002-07-14 10:54:49 120 549261.8
353.7 23237.7 3.434 243020.6 0.885 2452469.95542824
V4740 SGR-035C.REDUCED.FIT 2002-07-14 11:01:43 120 555858.0
358.8 23143.7 3.451 243089.7 0.898 2452469.96021991
V4740 SGR-036C.REDUCED.FIT 2002-07-14 11:04:01 120 558844.7
360.7 24041.7 3.416 240840.6 0.914 2452469.96181713
V4740 SGR-037C.REDUCED.FIT 2002-07-14 11:06:19 120 565479.8
354.2 21978.8 3.526 241605.8 0.923 2452469.96341435
V4740 SGR-038C.REDUCED.FIT 2002-07-14 11:08:37 120 556119.5
350.9 22443.9 3.485 242244.5 0.902 2452469.96501157
V4740 SGR-039C.REDUCED.FIT 2002-07-14 11:10:55 120 554820.6
347.2 23429.9 3.436 242686.8 0.898 2452469.9666088
V4740 SGR-040C.REDUCED.FIT 2002-07-14 11:13:13 120 556807.5
341.9 23067.9 3.457 243195.5 0.899 2452469.96820602
V4740 SGR-042C.REDUCED.FIT 2002-07-14 11:17:49 120 555637.6
335.4 23416.1 3.438 243350.0 0.896 2452469.97140046
V4740 SGR-043C.REDUCED.FIT 2002-07-14 11:20:07 120 553881.3
332.0 23233.2 3.443 243547.5 0.892 2452469.97299769
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