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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"

22237 results found.

  1. GRB 051117b: NIR observations
  2. GRB051117A : XRT refined analysis
  3. GRB 051117B: Optical observations
  4. GRB 051117B: ROTSE-III Optical Limits
  5. GRB 051028 Optical Observations
  6. GRB 051114: Radio Observations
  7. GRB051109A optical observations
  8. GRB 051111: Radio afterglow
  9. GRB 051111: AEOS optical observations
  10. GRB051103: Radio Observations
  11. GRB 051109A Milagro GeV/TeV Observations
  12. GRB051111: Swift/UVOT Observations
  13. GRB 051111A : R-band temporal decay index based on Lulin
  14. GRB051111: XRT preliminary analysis
  15. GRB 051109A Optical Observations
  16. GRB051111a: SARA Observations
  17. GRB 051111a: IR photometry
  18. GRB 051111A: KAIT optical observations
  19. GRB051111: Super-LOTIS Early Detection
  20. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  21. Faulkes Telescope R-band detection of GRB051111
  22. GRB 051103 Milagro GeV/TeV Observations
  23. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  24. GRB 051008 Tautenburg Supernova Search
  25. GRB 051109B. Radio Observations
  26. GRB051109A - radio observations
  27. GRB 051109A: KAIT optical observations
  28. GRB 051109A: Swift-UVOT Observations
  29. GRB051109B: XRT refined analysis
  30. GRB 051109B : Lulin Optical Observations
  31. GRB051109A: XRT refined analysis
  32. GRB 051109B: Super-LOTIS Observations
  33. GRB 051109B Kiso optical follow-up observation
  34. GRB 051109B: Swift detection of a burst
  35. GRB 051109: PROMPT Detections
  36. GRB 051109: Rc and Ic observations
  37. GRB051109: Early Super-LOTIS Detection
  38. GRB 051109a: MDM Observations
  39. GRB 051109a: IR Detections
  40. GRB 051109: ROTSE-III Detection of Possible Counterpart
  41. GRB051103: optical observations
  42. GRB 051103, optical observations
  43. GRB051103: MASTER: OT limit and host galaxy candidates
  44. GRB051028: Swift-XRT refined analysis
  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. GRB 051105A, optical observations
  51. XRT observations of GRB 051105A
  52. GRB051028:MASTER correction and final results
  53. GRB 051022: RTT150 optical observations
  54. GRB 051021A: RTT150 optical observations
  55. GRB051028 SARA Observation
  56. GRB051028: optical observations
  57. GRB051028: WHT optical candidate
  58. GRB051028:MASTER observations
  59. GRB051028:MASTER optical observations
  60. GRB051022: Swift XRT measurement of jet break
  61. GRB051021B: Swift/UVOT Upper limits
  62. GRB 051021, Optical Observations
  63. GRB 051022: XRT Refined Spectral and Temporal Analysis
  64. Chandra Observations of GRB 051022
  65. GRB051012: Swift-XRT analysis
  66. GRB 051022 Chandra Observations scheduled
  67. GRB051021B: Swift XRT refined analysis
  68. GRB051021a: optical observations
  69. GRB 051022: WSRT Radio Detection
  70. GRB 051022, mm counterpart
  71. GRB051022: Radio Counterpart
  72. GRB051022: IR observations
  73. GRB 051022: SOAR JKs Observations
  74. GRB051022: Optical Observations
  75. GRB 051022: Magellan NIR imaging
  76. GRB 051021: PROMPT RcIc Observations
  77. GRB 051022, J & K-band observation
  78. GRB 051021, SMARTS optical/IR observations
  79. GRB 051021: P200 Ks Observations
  80. GRB 051021: MDM Upper Limit
  81. GRB 051022 (=H3950): SXC Flight Localization is Valid
  82. GRB 051022: SSO40 Optical Observations
  83. GRB051022 (=H3590), A GRB Detected By HETE
  84. GRB 051022: Optical observations
  85. GRB 051021: SOAR NIR Observations
  86. GRB051021: Swift XRT analysis
  87. GRB 051021 : optical afterglow observation at Lulin
  88. GRB 051021: Optical observations
  89. GRB 051021: ROTSE-III Confirmation of Optical Counterpart
  90. GRB 051021: Optical observations and candidate afterglow
  91. GRB 051016b: Gemini Near IR Observations
  92. GRB 051016: LCO optical and near-IR imaging
  93. GRB 051016: PROMPT Observations
  94. Photometric calibration of Swift/UVOT and Re-analysis of Swift/UVOT GRB 050922C data
  95. GRB051006: optical observations
  96. GRB050805A: Rc optical observations
  97. GRB051008: optical candidate
  98. GRB 051008 - a low redshift low-luminosity burst?
  99. GRB051011: bright nebulae near error box
  100. GRB051008: optical observation

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