SUMMARY OF SEQUENCE NUMBER 790021

SUMMARY OF SEQUENCE NUMBER 790021

Title: IN FLIGHT CALIBRATION OF THE HETGS EFFECTIVE AREA AND CROSS DISPERSION PROFILE

Observer: Marshall

Subject Category: Active Galaxies and Quasars

Seq: 790021 ObsId: 00460

Long-term Plan bin: no LTS bin

ABSTRACT

The targets 3C 273 and Cyg X-2 are well-studied continuum sources that we propose to observe as calibration targets. The QSR 3C 273 has been observed for calibration purposes by XTE, SAX and ASCA simultaneously, so a cross-calibration with these missions would be possible if any of them can be available when AXAF observes 3C 273. In the case of Cyg X-2, its spectrum is relatively well known and it is known to be point-like, so that cross dispersion profiles can be measured.

TARGET SUMMARY

TARGET NAME RADEC TIME SI GRAT TYPE TC ROLL PRE PHASE MULTI PRI
3C 273
187.277917
2.052389
40.00000
HRC-S
LETG
CAL
yes
no
no
no
no
4

IMAGES

(NOTE: RASS images currently only available for targets LTS scheduled on or after Apr-09-2000)

Roll/Visibility

PARAMETERS

Obscat Parameters