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OBSID:
26163
 Title:
Re-visiting an Old Friend: Monitoring X-ray Sources in the Bulge of M31  
Investigator:
Irwin
 Observer:
Irwin, Jimmy
 Phone:
205-348-3791
 Email:
jairwin@ua.edu
Target Name:
m31
 Sequence Number:
601540
 Instrument:
HRC-I
 Grating:
NONE
 SI Mode:
OBS20743
 Raster Scan:
N
 Annotated DOT:
OCT1821a

Proposal Number:
22620093
 Right Ascension:
10.6847
 Declination:
41.2687
 Status:
archived
 Start Date:
2021-10-20 23:18:17
Category:
NORMAL GALAXIES
 Type:
GO
 AO Cycle:
22
 Dither Flag:
Y
 Y Offset:

 Z Offset:
Est. Count Rate:
0.1
 Order-1 Count Rate:

 Exposure Time:
24.00
 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:
After 16 years of near-monthly monitoring, Chandra has not observed the bulge of M31 since 2015. We propose a 3-year program to image M31 with the HRC-I once per year to continue monitoring campaigns such as searching for flares from the supermassive black hole in the nucleus M31*, determining turn-off times of post-nova supersoft emission, and investigate the variability of X-ray sources near [O III] nebula, possibly induced by microquasar-powered jets of the variable X-ray source. Continued 20+ year monitoring of over a hundred X-ray sources to a limiting luminosity of 2e35 ergs/s will also be performed.

Remarks:
Multi-cycle - 50 ksec per cycle

OBSID 26163 not found in Q/L Processing Logs dated Sun Mar 30 22:53:58 EST 2025

pgf@space.mit.edu Mon Mar 31 10:36:39 EST 2025