From gonzalez@lsu.edu Wed Aug 13 17:22:43 2003 Date: Mon, 11 Aug 2003 19:32:44 -0500 From: Gabriela Gonzalez To: John Zweizig , Daniel Sigg , Gabriela Gonzalez , Keith Riles , Ed Daw , Peter Fritschel , Brian O'Reilly , Rauha Rahkola , Robert Schofield , Stan Whitcomb , Rana Adhikari , Peter Shawhan , Mike Landry , Brian O'Reilly , Akiteru Takamori , Luca Matone , Peter Fritschel , Rana Adhikari , Gabriela Gonzalez , Patrick Sutton Subject: H1 calibration Hello, here is a file with H1 calibration "problems", similar to the L1 info I sent earlier. In H1, there seems to be only one kind of problem, when the line was missing (and alpha is consistent with zero). There are no "impossible" values of alpha, except for segment 89, and maybe 88. I suspect there is some other problem, which needs investigation. There is one strange instance in seg 141, when there are three minutes in the middle when the line seems to be missing, maybe somebody turned it off, or maybe there was some noise that made the line estimation unreliable. Either way, those minutes should be vetoed, although they merit further investigation. I attach a file with the observations and recommendations for H1. I think we probably need to add to the vetoed minutes the ones when the RDS data, and thus calibration information, is not there (see Patrick's web page http://gravity.psu.edu/~psutton/Calibrations/Calibrations.html ) I suspect these coincide with the "missing raw" flag, but haven't checked (Patrick?). Gaby. -- ################################################### Gabriela Gonzalez Assistant Professor Department of Physics and Astronomy Louisiana State University 202 Nicholson Hall Tower Drive Baton Rouge,LA 70803 Phone: (225) 578 0468 Email: gonzalez@lsu.edu http://www.phys.lsu.edu/faculty/gonzalez/ ################################################## [ Part 2: "Attached Text" ] Segment 2, 729275341-729276516: I don't have the trends to check, but alpha==0, so calibration line was probably not on. Discard segment (1175 sec). Seg 44, 729880685-729887462: calibration line was turned late. Use only 729881640-729887462. Seg 58, 730156898-730160621: calibration line was turned off, then on again. Use 730156898-730157460, and 730159440-730160621. Seg 59, 730231106-730237903: calibration line was off, then turned on near the end. Use only 730237260-730237903. Seg 61, 730332638-730349947: line was turned on late, use only 730334580-730349947. Seg 69, 730425165-730438212: line was turned on late, use only 730425540-730438212. Seg 83, 730665378-730665967: don't have the trends, but alpha is close to zero, so calibration line was probably not on. Discard segment (589 sec). Seg 87, 730691952-730741145: Calibration was turned on late. Use only 730692344-730741145. (The times for alpha beta are not the typical trend minutes for this segment. This may be better, if it is right. Patrick?). Seg 89: Alpha*beta values are low, below what we seem possible, but not close to zero. Calibration line amplitude is lower in segs 88, 89 than in neighboring segments. Maybe has a different beta? Needs to be investigated. Seg 109: 731626007-731627404: line was turned on late; use only 731626440-731627404. Seg 117, 731806213-731830412: line was turned on late, use only 731806656-731830412. (Again, strange minutes. Patrick?). Seg 120, 731878345-731878880 : don't have trends, but line was apparently off. Discard segment (535 sec). Seg 140, 732239472-732294714 : line was turned off at the end, use only 732239472-732294240. Seg 141, 732295424-732407844: strange drop in line amplitude in the middle, for three minutes. Don't know what is due to, but is indication of noise, unreliable calibration, or both. Break it up and use 732295424-732385140 and 732385440-732407844. Seg 219: 734256946-734325063: line was turned on late, use only 734257380-734325063. Seg 222, 734352709-734367613: line was turned on late, use only 734353140-734367613.