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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"

32762 results found.

  1. GROND upper limits of GRB 070521
  2. GRB 070521 Milagro GeV/TeV Observations
  3. GRB 070520B: SARA upper limit
  4. GRB 070520A: SARA upper limit
  5. GRB 070521: SARA upper limit
  6. GRB 070521: Subaru observations and possible host detection
  7. GRB070518: Optical/NIR observation
  8. GRB 070520B: Swift/UVOT Upper Limits
  9. GRB 070520A: Subaru Observations
  10. GRB 070521, Swift-BAT refined analysis
  11. GRB 070520A: Swift UVOT Upper Limits
  12. GRB 070520B: Swift-XRT refined analysis
  13. GRB070521: P200 Observations
  14. GRB070521 : Faulkes Telescope North Observations
  15. GRB070521: Bright SDSS Galaxy Near XRT Error Circle
  16. GRB 070520A: MITSuME Akeno optical upper limits
  17. GRB 070520B, Swift-BAT refined analysis
  18. GRB 070520A, Swift-BAT refined analysis
  19. GRB 070520A: Swift-XRT refined analysis
  20. GRB 070518: TNG observations
  21. GRB 070520: Xinglong EST optical Upper Limit
  22. VLA observation of GRB 070518
  23. GRB 070518: Swift-XRT refined analysis
  24. GRB 070517: Gemini optical imaging
  25. GRB070518: UVOT refined analysis
  26. GRB 070518, Swift-BAT refined analysis
  27. GRB 070518: OT confirmed form Xinglong TNT observation
  28. GRB070517: Swift-XRT Refined Analysis
  29. GRB 070517, Swift-BAT refined analysis
  30. GRB 070509: objects inside XRT error circle
  31. GRB070419A: optical observations
  32. GRB 070419A, Deep LBT photometry
  33. GRB 070509: Swift/UVOT Upper Limits
  34. Konus-Wind and Konus-A observation of GRB 070508
  35. Swift-BAT trigger 278987 is not a GRB
  36. GRB070509: Swift-XRT Refined Analysis
  37. RHESSI Spectrum of GRB070508
  38. GRB 070508: OA fading and tentative redshift
  39. GRB 070509, Swift-BAT refined analysis
  40. GRB 070508: Suzaku/WAM observation of the prompt emission
  41. GRB 070509: REM observations
  42. GRB 070509: ROTSE-III Optical Limits
  43. GRB070508: Swift/UVOT Observations
  44. GRB 070508, SMARTS optical afterglow observation
  45. GRB 070508, Swift-BAT refined analysis
  46. GRB 070508: Multicolor optical observations and possible redshift limit
  47. GRB 070508: Swift-XRT refined analysis
  48. GRB 070508: Optical observation limiting magnitude
  49. GRB 070508: Optical afterglow detection
  50. GRB 070508: REM observations
  51. GRB070412: MAGIC telescope GeV observation
  52. Swift-BAT trigger 278809 is not a GRB
  53. GRB 070506: VLT redshift
  54. GRB070506: Swift/UVOT Observations
  55. GRB070506: Swift XRT refined analysis
  56. GRB 070506, Swift-BAT Refined Analysis
  57. GRB 070412, deep LBT imaging
  58. GRB 070429A: Swift XRT further analysis
  59. GRB070429B: VLT observations
  60. GRB 070429A: optical observations
  61. GRB070429B: position correction
  62. GRB 070309: Swift-XRT afterglow confirmation
  63. GRB070429B: possible host galaxy detection
  64. VLA observation of GRB 070429B
  65. Swift/UVOT observations of GRB070429B
  66. GRB 070429B, Swift-BAT refined analysis
  67. Swift/UVOT observations of GRB070429A
  68. GRB 070429A: Swift XRT refined analysis
  69. GRB 070429A, Swift-BAT refined analysis
  70. GRB 070429B: Swift XRT refined analysis
  71. GRB 070429B: ROTSE-III Optical Limits
  72. GRB 070429: ROTSE-III Optical Limits
  73. GRB 070427, Swift-BAT Refined Analysis
  74. LT monitoring of GRB070412
  75. GRB 070411, further deep LBT photometry
  76. GRB 070411: Late-time Keck imaging
  77. GRB070419B: Suzaku WAM observation of the prompt emission
  78. GRB 070420, SMARTS optical/IR afterglow observations
  79. GRB 070411, deep LBT photometry
  80. Konus-Wind observation of GRB 070420
  81. GRB 070411: break in the optical light curve
  82. GRB 070420 Swift-BAT Refined Analysis
  83. GRB070419A: Kuiper Optical detection
  84. GRB070419a: Swift UVOT observations
  85. GRB 070419A: MARGE Observations
  86. GRB 070420: optical rebrightening observed at Mt. John
  87. GRB 070420: Swift XRT refined analysis
  88. GRB070420: Swift UVOT continuing observations
  89. GRB 070411: BART early limit
  90. GRB 070420: Faulkes Telescope South Observations
  91. GBR 070419A: Swift/XRT refined analysis
  92. GRB 070420: NIR and optical afterglow confirmed
  93. GRB 070419A: MITSuME Okayama Observations
  94. GRB 070419A: Early Super-LOTIS Observations
  95. GRB 070419B, Swift-BAT refined analysis
  96. GRB 070419A Swift-BAT Refined Analysis
  97. GRB070419B: Confirmation of Optical Transient
  98. GRB 070419A: RAPTOR Detection of Early Emission
  99. GRB 070419B: Swift XRT refined analysis
  100. GRB 070419: Keck/LRIS Absorption Redshift

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