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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"

36147 results found.

  1. GRB 051111A : Lulin BVRI multi band afterglow observation
  2. GRB051111a: SARA Observations
  3. GRB 051111a: IR photometry
  4. GRB 051111: Keck HIRES redshift
  5. GRB 051111A: KAIT optical observations
  6. GRB 051111a: Afterglow fading in Ic
  7. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  8. GRB 051103 Milagro GeV/TeV Observations
  9. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  10. GRB 051008 Tautenburg Supernova Search
  11. GRB 051109B. Radio Observations
  12. GRB 051109A
  13. GRB051109A - radio observations
  14. GRB 051105a: GETS optical limit
  15. GRB 051109b: GETS observation
  16. GRB 051109A: KAIT optical observations
  17. Early RAPTOR measurements of GRB 051109a - the movie.
  18. Konus-Wind observation of GRB 051109A
  19. GRB 051109B: Swift-BAT refined analysis
  20. GRB 051109B: ROTSE-III Optical Limits
  21. GRB 051109A: Swift-UVOT Observations
  22. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  23. GRB 051109B : Lulin Optical Observations
  24. GRB 051109A : Lulin BVRI Optical afterglow observation
  25. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  26. GRB051109B: XRT position
  27. GRB 051109B: Super-LOTIS Observations
  28. GRB 051109B Kiso optical follow-up observation
  29. GRB 051109B: Swift detection of a burst
  30. GRB 051109: HET Optical Spectrum and Absorption Redshift
  31. GRB 051109: PROMPT Detections
  32. GRB 051109: Rc and Ic observations
  33. GRB 051109: Swift-BAT refined analysis
  34. GRB 051109a: IR Photometry and Astrometry
  35. GRB 051109a: MDM Observations
  36. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  37. GRB 051109a: IR Detections
  38. GRB 051109: ROTSE-III Detection of Possible Counterpart
  39. GRB051105B: Swift/XRT upper limit
  40. GRB051105B: Swift/UVOT upper limit
  41. GRB051103: optical observations
  42. GRB 051103, optical observations
  43. GRB051103: MASTER: OT limit and host galaxy candidates
  44. GRB 051105a, observation from Naini Tal and OSN
  45. GRB 051105A, 2nd epoch optical observations
  46. GRB 051105a: MDM Observations
  47. GRB 051105A: TNG optical observations
  48. GRB051105A: Swift/UVOT Observations
  49. GRB 051105A, radio observations
  50. GRB051103:_MASTER_optical_observations
  51. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  52. GRB 051105A, optical observations
  53. XRT observations of GRB 051105A
  54. GRB 051105: Swift-BAT improved refined analysis
  55. GRB 051105b: ART optical limits
  56. GRB051105B - A long GRB detected by INTEGRAL
  57. GRB 051105B (INTEGRAL 2701): Optical observation
  58. GRB 051105: Swift-BAT refined analysis
  59. GRB 051105: Optical limit
  60. GRB 051105: Swift detection of a short burst
  61. IBAS Alert 2700: Not a GRB
  62. GRB 051016B host spectroscopy and redshift
  63. GRB051016B: optical observation
  64. Recent GRB UBVRcIc field photometry
  65. Konus-Wind observation of GRB 051028
  66. GRB051028:MASTER correction and final results
  67. GRB 051022: RTT150 optical observations
  68. GRB 051021A: RTT150 optical observations
  69. GRB051028 SARA Observation
  70. GRB051028: optical observations
  71. GRB051028: Swift/UVOT upper limits
  72. GRB051028: confirmation of the afterglow
  73. GRB051028: WHT optical candidate
  74. GRB051028: Swift XRT Position
  75. GRB051028:MASTER observations
  76. GRB 051028 (=H3951): A GRB localized by HETE
  77. GRB051028:MASTER optical observations
  78. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  79. GRB051022: Swift XRT measurement of jet break
  80. GRB051021B: Swift/UVOT Upper limits
  81. GRB 051021, Optical Observations
  82. GRB 051022: XRT Refined Spectral and Temporal Analysis
  83. GRB 051022, refined optical astrometry
  84. Chandra Observations of GRB 051022
  85. GRB 051022 Chandra Observations scheduled
  86. GRB051021a: optical observations
  87. GRB 051022: WSRT Radio Detection
  88. GRB 051022, mm counterpart
  89. GRB051022: host galaxy redshift
  90. GRB 051022: Swift/UVOT Upper Limits
  91. GRB051022: Radio Counterpart
  92. GRB 051022: SOAR JKs Observations
  93. Konus-Wind observation of GRB 051022
  94. GRB051022: Optical Observations
  95. GRB 051022: Magellan NIR imaging
  96. GRB 051021: PROMPT RcIc Observations
  97. GRB051021b: Magellan IR Imaging
  98. GRB 051022: Spectral Analysis Indicates That The Spectrum Is Absorbed
  99. GRB 051021: Correction
  100. GRB 051022, J & K-band observation

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