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OBSID:
29281
 Title:
INVESTIGATING THE CORRELATION BETWEEN LATE-TIME X-RAYS & RADIO EMISSION IN TDES 
Investigator:
Hajela
 Observer:
Hajela, Aprajita
 Phone:
+4591800198
 Email:
aprajita.hajela@gmail.com
Target Name:
AT 2018hyz
 Sequence Number:
503407
 Instrument:
ACIS-S
 Grating:
NONE
 SI Mode:
TE_0057AB
 Raster Scan:
N
 Annotated DOT:
FEB1924a

Proposal Number:
24500292
 Right Ascension:
151.712
 Declination:
1.69276
 Status:
archived
 Start Date:
2024-02-24 07:49:02
Category:
SN, SNR AND ISOLATED NS
 Type:
GO
 AO Cycle:
24
 Dither Flag:
Y
 Y Offset:
0
 Z Offset:
0
Est. Count Rate:
0.00012
 Order-1 Count Rate:

 Exposure Time:
6
 Time Remaining:
6.083
 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:
The tidal disruption of a star by a black hole provides a unique opportunity to study accretion physics. Recently, delayed radio flares have been discovered in several TDEs, peaking years after their optical emission has faded. Various explanations have been proposed, including off-axis jets entering our line of sight, delayed accretion disk formation, or a state change in the accretion flow. To elucidate the origin(s) of these flares, it has become crucial to acquire radio and X-ray observations of these events at late-times (~ months to years post-discovery) to study this previously unexplored phase in the lifetime of TDEs.

Remarks:
We require co-ordinated follow-up of X-rays and radio with the VLA (within 30 days of the Chandra observations), however we do not need the X-ray observations to be planned in any one particular time window during Cycle 24.

psci Run:
457
 Processing Date:
Jul 18 2024
 psci Directory:
/nfs/maaxnew/r3/fl/acis126e/acis126.log
OBSID:
29281
 SIM Mode:
ACIS-S
 OTG Mode:
NONE
 Seq Number:
503407
 Target Name:
AT_2018hyz
 AO:
24
Start VCDU:
62900:016
 Start Time (UTC):
055:29164.657
 Stop Time (UTC):
055:35258.901
 Kilosecs:
6.1
 % Frames:
100.0
 # CCDs:
S2
# Frames:
2004
 # Events:
56811
 Events/sec:
9
 PSCI errors:
0
 % drops:
0.0
 Bias Errs:
0
 FP Temp:
-114.3
Parameter Block:
0x0057a034
 Window Block:
-
 # Windows:
0
 FEP Mode:
Te5x5
 BEP Mode:
F
 Start Row:
0
 # Rows:
1024
Primary Exposure:
30
 Secondary Exposure:
0
 Duty Cycle:
0
 Summing?:
No
 Bias?:
Yes
 Trickle?:
Yes
 Bias Run:
457

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