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OBSID:
28104
 Title:
BRIGHT X-RAY BINARIES IN METAL POOR GALAXIES AND LIGO PRECURSORS   
Investigator:
Gallo
 Observer:
Gallo, Elena
 Phone:
8052595655
 Email:
egallo@umich.edu
Target Name:
UGC685
 Sequence Number:
601598
 Instrument:
ACIS-I
 Grating:
NONE
 SI Mode:
TE_006E6
 Raster Scan:
N
 Annotated DOT:
MAY2724a

Proposal Number:
25620362
 Right Ascension:
16.8575
 Declination:
16.6932
 Status:
archived
 Start Date:
2024-06-02 21:58:54
Category:
NORMAL GALAXIES
 Type:
GO
 AO Cycle:
25
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.001
 Order-1 Count Rate:

 Exposure Time:
17
 Time Remaining:
15.608
 Reqd Start Time:

 Reqd Stop Time:
Period:

 Epoch:

 Start of Period:

 End of Period:

 PS Margin:

 PE Margin:

 Max Segments:
0

ACIS Mode:
TE
 Standard?:
No
 BEP Mode:
VF
On-Chip Summing?:
No
 Row Sum:

 Column Sum:

 Frame Time:
Subarray Mode:
NONE
 Starting Row:
0
 Row Count:
1023
 Subarray Frame Time:

Duty Cycle?:
No
 Cycle Count:
0
 Primary Exp Time:

 Secondary Exp Time:
Event Filter?:
No
 Filter Threshold:

 Filter Range:

 Bias Requested?:
No
 Bias Frequency:

 Bias After?:
No
 Spatial Window?:
No

Abstract:
Chandra observations have established quantitative relationships between the X-ray binary (XRB) X-ray luminosity function and local properties of the host galaxies. The most recent studies indicate that metallicity becomes important above 1E+38 erg/s. Substantial progress in understanding the interplay between metallicity and bright XRBs can be made by (i) increasing the sample of nearby low-metallicity hosts with suitable X-ray data, and (ii) leveraging coordinated multi-band HST imaging to identify XRB optical counterparts (donor star or star cluster) on a case by case basis. We propose to do so for the 23 nearby dwarf galaxies targeted by the HST LEGUS survey: out of those, 6 have suitable Chandra data; we propose to observe the remaining 17, for a total request of XX ks.

psci Run:
351
 Processing Date:
Jul 18 2024
 psci Directory:
/nfs/maaxnew/r3/fm/acis127d/acis127.log
OBSID:
28104
 SIM Mode:
ACIS-I
 OTG Mode:
NONE
 Seq Number:
601598
 Target Name:
UGC685
 AO:
25
Start VCDU:
63127:112
 Start Time (UTC):
154:80567.656
 Stop Time (UTC):
155:09787.919
 Kilosecs:
15.6
 % Frames:
100.0
 # CCDs:
I4
# Frames:
4973
 # Events:
209386
 Events/sec:
13
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-113.3
Parameter Block:
0x006e7034
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te5x5
 BEP Mode:
F
 Start Row:
0
 # Rows:
1024
Primary Exposure:
31
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
No
 Trickle?:
Yes
 Bias Run:
350

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