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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"

21937 results found.

  1. GRB 051221A: MDM Optical Observations
  2. GRB 051221B: TAROT optical limits
  3. GRB 051221A: WSRT Radio Observations
  4. GRB 051221: Redshift from Gemini
  5. GRB 051221: Continued fading of optical afterglow
  6. GRB 051221B: BOOTES optical observations.
  7. GRB 051221: Discovery of fading optical afterglow
  8. GRB 051221: Possible nearby cluster
  9. GRB 051221: No variability in Gemini data
  10. GRB 051221: Gemini observations
  11. GRB 051221: IR Observations at GRB+1hr
  12. GRB051211A (=H3979): Refined Analysis
  13. GRB 051211B: optical afterglow
  14. GRB051211A: possible optical candidate
  15. GRB 051215: near-infrared observations
  16. GRB051215 - SDSS pre-burst observations
  17. GRB 051215: A short GRB in a cluster?
  18. GRB051211B: Probable radio afterglow
  19. GRB051105: optical observations
  20. GRB 051211a: RTT150 optical observations
  21. GRB051211B, RBO optical observations
  22. GRB 051211B: Swift XRT confirmation of the afterglow
  23. GRB 051211b: RTT150 optical observations
  24. GRB051211b: P60 Observations
  25. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  26. GRB 051211B: Swift XRT Observations
  27. GRB 051211: TAROT optical limits
  28. GRB 051211B: a possible optical detection by TAROT
  29. GRB 051211: Swift XRT upper limit
  30. GRB 051211:IAC80 optical observations
  31. GRB 051210: BAT further refined analysis of the short burst
  32. GRB 051210: A short GRB in a cluster?
  33. IPN observations of SGR1806-20
  34. GRB051111: Rc optical observations: correction
  35. GRB 051117A: Swift/UVOT Detection of an Afterglow
  36. GRB051111: Rc optical observations
  37. GRB 051021 Optical Observations
  38. GRB 051117A and B: Radio Observations
  39. GRB 051117B: R and I observations of possible host galaxy
  40. GRB 051117b: NIR observations
  41. GRB051117A : XRT refined analysis
  42. GRB 051117B: Optical observations
  43. GRB 051117B: ROTSE-III Optical Limits
  44. GRB 051028 Optical Observations
  45. GRB 051114: Radio Observations
  46. GRB051109A optical observations
  47. GRB 051111: Radio afterglow
  48. GRB 051111: AEOS optical observations
  49. GRB051103: Radio Observations
  50. GRB 051109A Milagro GeV/TeV Observations
  51. GRB051111: Swift/UVOT Observations
  52. GRB 051111A : R-band temporal decay index based on Lulin
  53. GRB051111: XRT preliminary analysis
  54. GRB 051109A Optical Observations
  55. GRB051111a: SARA Observations
  56. GRB 051111a: IR photometry
  57. GRB 051111A: KAIT optical observations
  58. GRB051111: Super-LOTIS Early Detection
  59. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  60. Faulkes Telescope R-band detection of GRB051111
  61. GRB 051103 Milagro GeV/TeV Observations
  62. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  63. GRB 051008 Tautenburg Supernova Search
  64. GRB 051109B. Radio Observations
  65. GRB051109A - radio observations
  66. GRB 051109A: KAIT optical observations
  67. GRB 051109A: Swift-UVOT Observations
  68. GRB051109B: XRT refined analysis
  69. GRB 051109B : Lulin Optical Observations
  70. GRB051109A: XRT refined analysis
  71. GRB 051109B: Super-LOTIS Observations
  72. GRB 051109B Kiso optical follow-up observation
  73. GRB 051109B: Swift detection of a burst
  74. GRB 051109: PROMPT Detections
  75. GRB 051109: Rc and Ic observations
  76. GRB051109: Early Super-LOTIS Detection
  77. GRB 051109a: MDM Observations
  78. GRB 051109a: IR Detections
  79. GRB 051109: ROTSE-III Detection of Possible Counterpart
  80. GRB051103: optical observations
  81. GRB 051103, optical observations
  82. GRB051103: MASTER: OT limit and host galaxy candidates
  83. GRB051028: Swift-XRT refined analysis
  84. GRB 051105A, 2nd epoch optical observations
  85. GRB 051105a: MDM Observations
  86. GRB 051105A: TNG optical observations
  87. GRB051105A: Swift/UVOT Observations
  88. GRB 051105A, radio observations
  89. GRB 051105A, optical observations
  90. XRT observations of GRB 051105A
  91. GRB 051016B host spectroscopy and redshift
  92. GRB051028:MASTER correction and final results
  93. GRB 051022: RTT150 optical observations
  94. GRB 051021A: RTT150 optical observations
  95. GRB051028 SARA Observation
  96. GRB051028: optical observations
  97. GRB051028: WHT optical candidate
  98. GRB051028:MASTER observations
  99. GRB051028:MASTER optical observations
  100. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction

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