ROSAT Status Report #172: Processing Error in Recent US Sequences

[Michael Arida <arida@milkyway.gsfc.nasa.gov>]

Date: Mon, 11 May 1998 17:13:54 -0400
Subject: status report on boresight error


		Processing Error in Recent US Sequences
		=======================================

MPE has found a rounding error caused by an unfortunate combination of
bugs
in updates of INGRES and ALPHA systems. The bottom line is that the bore
sights are incorrect for all ROSAT observations processed after 4
October,
1997 and before May 8, 1998.

Displacements of up to 10 arcsec can occur, as has been verified on
recent
M87 data. The images are normal (if the roll angle did not change), but
their registration on the sky is incorrect.

The USRSDC has begun reprocessing and redistribution of all affected
sequences.  
Attached is a list of affected sequences (provided by MPE).

	Affected PSPC SEQs
	==================

	+--------------------+
	|seq	|
	+--------------------+
	|US201475P	|
	|US201489P	|
	|US300335P	|
	|US400363P	|
	|US400373P	|
	|US500218P	|
	|US500220P	|
	|US500221P	|
	|US500222P	|
	|US500223P	|
	|US500224P	|
	|US500225P	|
	|US500251P	|
	|US500255P	|
	|US500258P	|
	|US500263P	|
	|US500267P	|
	|US600504P	|
	|US600538P	|
	|US600540P	|
	|US700999P	|
	|US701028P	|
	|US701353P	|
	|US701364P	|
	|US701377P	|
	|US701390P	|
	|US701396P	|
	|US701406P	|
	|US701413P	|
	|US701420P	|
	|US701435P	|
	|US800468P	|
	|US800488P	|
	|US800520P	|
	|US800522P	|
	|US900435P	|
	|US900496P	|
	+--------------------+
	(37 rows)


	Affected HRI SEQs
	==================

	+--------------------+
	|seq	|
	+--------------------+
	|US180204H	|
	|US180205H	|
	|US180206H	|
	|US180207H	|
	|US180240H	|
	|US201451H	|
	|US201827H	|
	|US202077H	|
	|US202302H	|
	|US202305H	|
	|US202309H	|
	|US202314H	|
	|US202315H	|
	|US202319H	|
	|US202320H	|
	|US202321H	|
	|US202322H	|
	|US202324H	|
	|US202325H	|
	|US202329H	|
	|US202331H	|
	|US202332H	|
	|US202334H	|
	|US202336H	|
	|US202337H	|
	|US202338H	|
	|US202554H	|
	|US202559H	|
	|US202560H	|
	|US202570H	|
	|US202574H	|
	|US202578H	|
	|US202582H	|
	|US202584H	|
	|US202588H	|
	|US202592H	|
	|US202594H	|
	|US202596H	|
	|US202600H	|
	|US202602H	|
	|US202624H	|
	|US202634H	|
	|US202674H	|
	|US202675H	|
	|US202676H	|
	|US202677H	|
	|US202690H	|
	|US202692H	|
	|US202693H	|
	|US202694H	|
	|US202697H	|
	|US202698H	|
	|US202700H	|
	|US202703H	|
	|US300544H	|
	|US300545H	|
	|US300547H	|
	|US300548H	|
	|US300549H	|
	|US300593H	|
	|US300597H	|
	|US400850H	|
	|US400854H	|
	|US400857H	|
	|US400864H	|
	|US400868H	|
	|US400869H	|
	|US400870H	|
	|US400871H	|
	|US400872H	|
	|US400873H	|
	|US400874H	|
	|US400875H	|
	|US400876H	|
	|US400877H	|
	|US400878H	|
	|US400879H	|
	|US400880H	|
	|US400881H	|
	|US400882H	|
	|US400904H	|
	|US400906H	|
	|US400915H	|
	|US400922H	|
	|US400927H	|
	|US500445H	|
	|US500485H	|
	|US500486H	|
	|US500487H	|
	|US500490H	|
	|US500491H	|
	|US500492H	|
	|US500494H	|
	|US500497H	|
	|US500499H	|
	|US500501H	|
	|US500522H	|
	|US500523H	|
	|US500537H	|
	|US500538H	|
	|US500539H	|
	|US500550H	|
	|US600913H	|
	|US600914H	|
	|US600915H	|
	|US600916H	|
	|US600917H	|
	|US600918H	|
	|US600919H	|
	|US600920H	|
	|US600921H	|
	|US600922H	|
	|US600923H	|
	|US600924H	|
	|US600925H	|
	|US600926H	|
	|US600927H	|
	|US600928H	|
	|US600929H	|
	|US600930H	|
	|US600931H	|
	|US600932H	|
	|US600935H	|
	|US600936H	|
	|US600939H	|
	|US600943H	|
	|US600946H	|
	|US601033H	|
	|US601036H	|
	|US601037H	|
	|US601040H	|
	|US601048H	|
	|US601051H	|
	|US702055H	|
	|US702056H	|
	|US702058H	|
	|US702080H	|
	|US702758H	|
	|US702759H	|
	|US702760H	|
	|US702761H	|
	|US702768H	|
	|US702772H	|
	|US702773H	|
	|US702777H	|
	|US702778H	|
	|US702810H	|
	|US702839H	|
	|US702843H	|
	|US702857H	|
	|US702859H	|
	|US702865H	|
	|US702883H	|
	|US703994H	|
	|US703995H	|
	|US703998H	|
	|US703999H	|
	|US704000H	|
	|US704019H	|
	|US704027H	|
	|US704029H	|
	|US800767H	|
	|US800875H	|
	|US800879H	|
	|US800882H	|
	|US800886H	|
	|US800888H	|
	|US800889H	|
	|US800893H	|
	|US800894H	|
	|US800906H	|
	|US800979H	|
	|US800982H	|
	|US800989H	|
	|US800990H	|
	|US800992H	|
	|US800996H	|
	|US800997H	|
	|US800998H	|
	|US801002H	|
	|US801003H	|
	|US801004H	|
	|US801005H	|
	|US801007H	|
	|US801014H	|
	|US801015H	|
	|US801016H	|
	|US801018H	|
	|US900706H	|
	|US900707H	|
	|US900710H	|
	|US900711H	|
	|US900712H	|
	|US900739H	|
	|US900742H	|
	|US900743H	|
	|US900744H	|
	|US900745H	|
	|US900746H	|
	|US900747H	|
	|US900748H	|
	|US900749H	|
	|US900750H	|
	|US900752H	|
	|US900753H	|
	|US900756H	|
	|US900845H	|
	|US900846H	|
	|US900847H	|
	|US900849H	|
	|US900850H	|
	|US900851H	|
	|US900852H	|
	|US900853H	|
	|US900854H	|
	|US900855H	|
	|US900856H	|
	|US900857H	|
	|US900859H	|
	|US900860H	|
	|US900861H	|
	|US900885H	|
	|US900886H	|
	|US900887H	|
	|US900888H	|
	|US900889H	|
	|US900890H	|
	|US900891H	|
	|US900892H	|
	|US900893H	|
	|US900894H	|
	|US900895H	|
	|US900896H	|
	|US900897H	|
	|US900898H	|
	|US900899H	|
	|US900900H	|
	|US900901H	|
	|US900902H	|
	|US900903H	|
	|US900904H	|
	|US900905H	|
	|US900907H	|
	|US900908H	|
	|US900909H	|
	|US900910H	|
	|US900912H	|
	|US900913H	|
	|US900914H	|
	|US900915H	|
	|US900917H	|
	|US900918H	|
	|US900919H	|
	|US900920H	|
	|US900921H	|
	|US900922H	|
	|US900923H	|
	|US900924H	|
	|US900925H	|
	|US900926H	|
	|US900927H	|
	+--------------------+
	(261 rows)


...............................................................................