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OBSID:
24535
 Title:
AO-22 Monitor the HRC-I PSF and spatial Variations in the HRC-I Gain - March 
Investigator:
Calibration
 Observer:
Ping, Zhao
 Phone:
617 495-7421
 Email:
pzhao@cfa.harvard.edu
Target Name:
ArLac
 Sequence Number:
291607
 Instrument:
HRC-I
 Grating:
NONE
 SI Mode:
OBS20743
 Raster Scan:
N
 Annotated DOT:
MAR2921a

Proposal Number:
22200636
 Right Ascension:
332.17
 Declination:
45.7423
 Status:
archived
 Start Date:
2021-04-04 17:46:25
Category:
STARS AND WD
 Type:
CAL
 AO Cycle:
22
 Dither Flag:
Y
 Y Offset:

 Z Offset:
3.0
Est. Count Rate:
10
 Order-1 Count Rate:

 Exposure Time:
1.00
 Time Remaining:

 Reqd Start Time:

 Reqd Stop Time:
Period:

 Epoch:

 Start of Period:

 End of Period:

 PS Margin:

 PE Margin:

 Max Segments:
0

Trigger Level:
DEF
 Range Switch Lvl:
DEF
 Spect Mode:
DEF
 Antico Enab:
DEF
 Width Enab:
DEF
 Width Thold:
DEF
 Uld Enab:
DEF
 Upper Lvl Disc:
DEF
Blank Enab:
EDGE
 U Blank Hi:
119
 V Blank Hi:
119
 U Blank Lo:
69
 V Blank Lo:
69
 Py Shutter Pos:
DEF
 My Shutter Pos:
DEF
 Timing Mode:
N

Abstract:
We continue to monitor the small scale gain variations in the HRC-I with raster scans of ArLac.

Remarks:
This set of Ar Lac observations is designed to measure the Chandra optical axis. So preferably these 21 observations (obsids: 24525-24545) are done back-to-back, consecutively in the order of obsid.

OBSID 24535 not found in Q/L Processing Logs dated Fri Apr 4 21:40:32 EST 2025

pgf@space.mit.edu Thu Apr 3 20:00:53 EST 2025