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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

26516 results found.

  1. GRB 050908: P60 Confirmation of Optical Afterglow
  2. GRB 050908: Optical Observations
  3. GRB 050906: Optical observations at the Very Large Telescope
  4. GRB 050906: Swift-BAT refined analysis
  5. GRB 050906: Swift XRT upper limit
  6. GRB 050906: Radio Observations
  7. GRB 050904: Keck I-band Imaging
  8. GRB050906: P60 Observations
  9. GRB 050904: BOOTES early R-band observation
  10. GRB 050904: photometric redshift
  11. GRB 050904: Swift/UVOT observations
  12. GRB 050904: NIR object inside the XRT error box
  13. GRB 050904: early Swift XRT analysis results
  14. GRB 050904: BAT refined analysis of partial data set
  15. GRB 050904: TAROT optical measurements
  16. GRB 050904: Environmental Constraints
  17. GRB 050904: Possible High-Redshift GRB
  18. GRB 050904: TAROT optical limits
  19. GRB 050827: Optical Limit
  20. Subaru Observations of GRB050724
  21. GRB 050826: Optical Candidate
  22. GRB050824, HETE-2 Observation
  23. GRB 050826: BAT refined analysis
  24. GRB050824: First 2 hours of power low optical decay?
  25. GRB050826: Swift-BAT detection of a long burst
  26. GRB050824: MASTER final analysis of the OT observations
  27. Possible GRB050825:MASTER optical observations
  28. GRB050824: CORRECTION to UVOT observing times
  29. GRB050824: Swift/UVOT detection of fading afterglow
  30. GRB050824, I-band imaging
  31. GRB050824: Radio Observations
  32. GRB 050822: refined XRT analysis
  33. GRB 050824: BAT refined analysis of a soft weak burst
  34. GRB050824: MASTER:OT decay
  35. GRB050824: MASTER observation OT
  36. GRB050805a: MASTER optical candidat
  37. GRB 050824: ROTSE-III Optical Limits
  38. GRB050820a: PROMPT RcIc Observations
  39. XRF050509c: Radio upper limits from GMRT
  40. VLT/UVES spectroscopy of GRB050820
  41. GRB 050820A BAT observations of second, larger episode of emission
  42. GRB050820B at FRAM
  43. GRB 050820a - corrections to GCN 3846
  44. GRB 050822: ROTSE-III Prompt Optical Limits
  45. GRB 050822: Swift detection of a long burst
  46. GRB050820A: Radio Observation
  47. GRB050825a - very long GRB like GRB041219a? (Konus-Wind observation)
  48. GRB 050820a: NIR Observations by WIRO
  49. GRB050820: refined XRT analysis
  50. GRB 050820: Early RAPTOR detections
  51. GRB 050820 Swift-BAT refined analysis
  52. GRB050819: refined XRT analysis
  53. GRB050820: Optical afterglow from P60
  54. GRB 050819 Swift-BAT refined analysis
  55. Swift Trigger 150823 is HETE J1900.1-2455
  56. GRB 050815: Radio Observation
  57. GRB050814: Radio Observation
  58. GRB 050814: continued fading
  59. GRB050815: Optical afterglow detection by Swift UVOT
  60. GRB050815: XRT refined analysis
  61. GRB 050813: Radio Observations
  62. GRB050815: Refined analysis of the Swift-BAT burst
  63. GRB050814: Fading red source
  64. GRB 050813: Gemini Spectra Revisited
  65. GRB050814: P60 Optical Afterglow Candidate
  66. GRB 050813: Non-fading of afterglow candidate
  67. GRB 050814: XRT refined analysis
  68. GRB 050813: Gemini spectroscopy and redshifts of galaxies B and C
  69. GRB 050813: Magellan detection of a high redshift galaxy cluster
  70. GRB050813, SDSS pre-burst observations
  71. GRB 050813: KAIT optical limit
  72. GRB050813: SWIFT/UVOT observation
  73. GRB 050813: Possible Short Swift-BAT GRB
  74. GRB050813 (Swift 150139): P60 Observations
  75. Swift-BAT trigger 150131 is not a GRB
  76. GRB050807(=H3889): An X-Ray Rich GRB Localized by HETE
  77. Ongoing activity of SGR 1806-20: an intermediate burst 050811
  78. Detection of an intermediate burst from SGR 1806-20 on August 8
  79. GRB 050730, optical observation
  80. GRB050805b: CrAO optical limit
  81. GRB050805a : Null detection report
  82. Retraction of Swift Trigger 149131 (GRB 050805B)
  83. GRB 050805b: OHP optical limits
  84. GRB 050805b: TAROT optical limits
  85. GRB050805b: MASTER optical observations
  86. GRB050805a: MASTER optical candidat
  87. Swift-BAT trigger 149118 is probably not a GRB
  88. GRB050802: TNG optical observations
  89. GRB050803: Radio Observation
  90. GRB050801: Radio Observation
  91. GRB050730: Radio Detection
  92. GRB050803: CrAO optical observations, possible OT candidate
  93. GRB050803: Optical/UV Upper Limits from Swift-UVOT
  94. GRB 050802.422: Fading of the afterglow and detection of the host
  95. GRB050803: MASTER further analys
  96. GRB 050803, optical observations
  97. GRB 050803: TAROT optical limits
  98. GRB050803: MASTER optical observations
  99. GCN GRB observation 050713A
  100. GRB050730: FORS1 and UVES/VLT low- and high-resolution spectroscopy

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