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OBSID:
25079
 Title:
HETG Spectroscopy of the Black Hole 4U 1543-475      
Investigator:
Miller
 Observer:
Miller, Jon
 Phone:
617 529 5725
 Email:
jonmm@umich.edu
Target Name:
4U 1543-475
 Sequence Number:
402298
 Instrument:
ACIS-S
 Grating:
HETG
 SI Mode:
CC_00154B
 Raster Scan:
N
 Annotated DOT:
JUN2121a

Proposal Number:
22408790
 Right Ascension:
236.785
 Declination:
-47.6695
 Status:
archived
 Start Date:
2021-06-21 09:04:32
Category:
BH AND NS BINARIES
 Type:
DDT
 AO Cycle:
22
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
744
 Order-1 Count Rate:
546
 Exposure Time:
30
 Time Remaining:
28.058
 Reqd Start Time:

 Reqd Stop Time:
Period:

 Epoch:

 Start of Period:

 End of Period:

 PS Margin:

 PE Margin:

 Max Segments:
0

ACIS Mode:
CC
 Standard?:
No
 BEP Mode:
G
On-Chip Summing?:
No
 Row Sum:

 Column Sum:

 Frame Time:
Subarray Mode:

 Starting Row:

 Row Count:

 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?:
Yes
Chip:
S3
 Include Flag:
E
 Start Row:
1
 Start Column:
155
 Width:
100
 Height:
1024
 Lower Threshold:
0.08
 Pha Range:
13
 Sample:
10

Abstract:
4U 1543-475 is a recurrent black hole X-ray binary. It is one of the few sources with a dynamically confirmed mass, and measured distance (M = 9.4 +/- 2.0 Msun, distance = 7.5 +/- 1.0 kpc; Park et al. 2004). This means that it is a rare case wherein black hole spin can be measured using continuum fitting. The source has risen very quickly from the detection of renewed activity only (up to 2.5-3 Crab in just 2-3 days, see ATEL 14701). It is now in the soft state, which is the one wherein spin can be measured as other contributions to the continuum are minimal. In this state, disk winds and UFOs can also be detected using the HETGS. With the ACIS-S array in CC mode, Chandra is uniquely able to observe a source this bright without distortions.

psci Run:
70
 Processing Date:
Jul 4 2021
 psci Directory:
/nfs/maaxnew/r3/fb/acis116b/acis116.log
OBSID:
25079
 SIM Mode:
ACIS-S
 OTG Mode:
HETG
 Seq Number:
402298
 Target Name:
4U_1543-475
 AO:
22
Start VCDU:
114288:088
 Start Time (UTC):
172:33679.562
 Stop Time (UTC):
172:61779.416
 Kilosecs:
28.1
 % Frames:
100.0
 # CCDs:
S5
# Frames:
19257
 # Events:
11393909
 Events/sec:
405
 PSCI errors:
0
 % drops:
83.6
 Bias Errs:
1
 FP Temp:
-116.0
Parameter Block:
0x00154014
 Window Block:
0x0011c014
 # Windows:
1
 FEP Mode:
Cc3x3
 BEP Mode:
G
 Start Row:
0
 # Rows:
512
Primary Exposure:
-
 Secondary Exposure:
-
 Duty Cycle:
-
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
70

pgf@space.mit.edu Sat Mar 29 10:37:19 EST 2025