Observations of 1058+38 Markarian 421 with Hubble Space Telescope
Abstract:
Astronomers at Space Telescope Science Institute have requested our assistance in the multiwavelength observing campaign they have planned for the object Markarian 421. Their campaign will utilize four space satellites - XTE (X-ray Timing Explorer), ISO (Infrared Satellite Observatory), IUE (International Ultraviolet Explorer), and ROSAT - and will take place from April 7 through April 20. Visual observations, unfiltered CCD observations, and, particularly, B and V filtered CCD observations will be very important to the successful correlation of the multiwavelength data. Please monitor Mark 421 closely from April 7 through April 20, and report your observations to AAVSO Headquarters.
Justification:
The campaign aims to correlate multiwavelength data from four space satellites using visual observations, unfiltered CCD observations, and B and V filtered CCD observations.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| NSV 421 | 8.60 | LB |
Cadence: Not Specified Precision: 100 |
Not Requested |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
B (Johnson), V (Johnson)
Comparison Stars:
No comparison stars provided
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Forum URL
N/A
Notes:
Principal Investigator: Astronomers at Space Telescope Science Institute; Imported Campaign (Alert Notice #220)