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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.

Advanced Search Examples (click to copy):

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

21949 results found.

  1. GRB 051221A: VLA Radio Observations
  2. GRB051227: Radio Observations
  3. GRB 051227: Confirmed fading from Gemini observations
  4. GRB 051227: optical afterglow
  5. GRB 051227: Gemini observations
  6. GRB 051227: Keck Spectroscopy
  7. GRB 051227: Magellan r'-band Imaging/Astrometry
  8. GRB 051227: P60 Observations
  9. GRB 051227: R-band object in the XRT error circle
  10. GRB 051227: Further analysis of the Swift-BAT burst
  11. GRB051227: SDSS pre-burst observations
  12. GRB051117B: optical observation
  13. GRB 051221A: MDM Optical Observations
  14. GRB 051221B: TAROT optical limits
  15. GRB 051221A: WSRT Radio Observations
  16. GRB 051221: Redshift from Gemini
  17. GRB 051221: Continued fading of optical afterglow
  18. GRB 051221B: BOOTES optical observations.
  19. GRB 051221: Discovery of fading optical afterglow
  20. GRB 051221: Possible nearby cluster
  21. GRB 051221: No variability in Gemini data
  22. GRB 051221: Gemini observations
  23. GRB 051221: IR Observations at GRB+1hr
  24. GRB051211A (=H3979): Refined Analysis
  25. GRB 051211B: optical afterglow
  26. GRB051211A: possible optical candidate
  27. GRB 051215: near-infrared observations
  28. GRB051215 - SDSS pre-burst observations
  29. GRB 051215: A short GRB in a cluster?
  30. GRB051211B: Probable radio afterglow
  31. GRB051105: optical observations
  32. GRB 051211a: RTT150 optical observations
  33. GRB051211B, RBO optical observations
  34. GRB 051211B: Swift XRT confirmation of the afterglow
  35. GRB 051211b: RTT150 optical observations
  36. GRB051211b: P60 Observations
  37. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  38. GRB 051211B: Swift XRT Observations
  39. GRB 051211: TAROT optical limits
  40. GRB 051211B: a possible optical detection by TAROT
  41. GRB 051211: Swift XRT upper limit
  42. GRB 051211:IAC80 optical observations
  43. GRB 051210: BAT further refined analysis of the short burst
  44. GRB 051210: A short GRB in a cluster?
  45. IPN observations of SGR1806-20
  46. GRB051111: Rc optical observations: correction
  47. GRB 051117A: Swift/UVOT Detection of an Afterglow
  48. GRB051111: Rc optical observations
  49. GRB 051021 Optical Observations
  50. GRB 051117A and B: Radio Observations
  51. GRB 051117B: R and I observations of possible host galaxy
  52. GRB 051117b: NIR observations
  53. GRB051117A : XRT refined analysis
  54. GRB 051117B: Optical observations
  55. GRB 051117B: ROTSE-III Optical Limits
  56. GRB 051028 Optical Observations
  57. GRB 051114: Radio Observations
  58. GRB051109A optical observations
  59. GRB 051111: Radio afterglow
  60. GRB 051111: AEOS optical observations
  61. GRB051103: Radio Observations
  62. GRB 051109A Milagro GeV/TeV Observations
  63. GRB051111: Swift/UVOT Observations
  64. GRB 051111A : R-band temporal decay index based on Lulin
  65. GRB051111: XRT preliminary analysis
  66. GRB 051109A Optical Observations
  67. GRB051111a: SARA Observations
  68. GRB 051111a: IR photometry
  69. GRB 051111A: KAIT optical observations
  70. GRB051111: Super-LOTIS Early Detection
  71. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  72. Faulkes Telescope R-band detection of GRB051111
  73. GRB 051103 Milagro GeV/TeV Observations
  74. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  75. GRB 051008 Tautenburg Supernova Search
  76. GRB 051109B. Radio Observations
  77. GRB051109A - radio observations
  78. GRB 051109A: KAIT optical observations
  79. GRB 051109A: Swift-UVOT Observations
  80. GRB051109B: XRT refined analysis
  81. GRB 051109B : Lulin Optical Observations
  82. GRB051109A: XRT refined analysis
  83. GRB 051109B: Super-LOTIS Observations
  84. GRB 051109B Kiso optical follow-up observation
  85. GRB 051109B: Swift detection of a burst
  86. GRB 051109: PROMPT Detections
  87. GRB 051109: Rc and Ic observations
  88. GRB051109: Early Super-LOTIS Detection
  89. GRB 051109a: MDM Observations
  90. GRB 051109a: IR Detections
  91. GRB 051109: ROTSE-III Detection of Possible Counterpart
  92. GRB051103: optical observations
  93. GRB 051103, optical observations
  94. GRB051103: MASTER: OT limit and host galaxy candidates
  95. GRB051028: Swift-XRT refined analysis
  96. GRB 051105A, 2nd epoch optical observations
  97. GRB 051105a: MDM Observations
  98. GRB 051105A: TNG optical observations
  99. GRB051105A: Swift/UVOT Observations
  100. GRB 051105A, radio observations

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