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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"

45544 results found.

  1. GRB 100713A: Swift XRT refined analysis
  2. GRB 100713A : IRSF/SIRIUS NIR upper limits
  3. Fermi GBM trigger 300794561 (100714419) is not a GRB
  4. GRB100713A: Swift/UVOT observations
  5. GRB 100713A: GROND upper limits
  6. GRB 100713A: optical upper limit
  7. GRB 100713A: TNG optical observations
  8. GRB 100713A: TELMA and 1.5m OSN optical observations
  9. GRB100713A: Swift X-ray afterglow detection
  10. GRB 100713A: a long GRB detected by INTEGRAL
  11. GRB 100707A: Suzaku WAM observation of the prompt emission
  12. Fermi GBM trigger 300370702 (100709513) is not a GRB
  13. Konus-Wind observation of GRB 100707A
  14. IPN triangulation of GRB 100707A
  15. GRB 100628A: Keck/LRIS Spectroscopy of Host Galaxy Candidate
  16. GRB 100707A: Fermi LAT detection
  17. GRB 100707A: Fermi GBM detection
  18. GRB 100628A: Near-IR sources coincident with the possible X-ray afterglow
  19. GRB 100628A: Chandra observations
  20. GRB 100628A: Swift XRT/UVOT refined analysis
  21. Tentative redshift of GRB100704A from Swift-XRT data
  22. Konus-Wind observation of GRB 100701B
  23. IPN triangulation of GRB 100701B
  24. Konus-Wind observation of GRB 100704A
  25. GRB 100703A: a short GRB detected by INTEGRAL
  26. GRB 100704A: Swift XRT refined analysis
  27. GRB 100704: Swift/UVOT Upper Limits
  28. GRB 100704A: Fermi GBM observation
  29. GRB 100704A: Swift-BAT refined analysis
  30. GRB100704A: MOA optical upper limit
  31. GRB 100704A: Enhanced Swift-XRT position
  32. GRB 100704A: Swift detection of a burst
  33. GRB 100615A: Additional Gemini/NIRI observations
  34. GRB 100526A: Gemini/NIRI afterglow confirmation and host galaxy
  35. GRB 100702A, Swift-BAT refined analysis
  36. Fermi GBM trigger 299767472 (100702531) is not a GRB
  37. GRB 100702A: Swift XRT refined analysis
  38. Swift/UVOT observations of GRB100702A - correction
  39. Swift/UVOT observations of GRB100702A
  40. GRB 100702A: Second epoch of Magellan near-IR observations and afterglow limits
  41. GRB 100701B: Fermi GBM detection
  42. GRB 100702A: Magellan near-IR observations
  43. GRB 100702A: VLT optical observations
  44. GRB 100702: ROTSE-III Optical Limits
  45. GRB 100702A: Swift detection of a short burst
  46. GRB 100615A: Chandra X-ray ToO Observation
  47. XRF 100701A : MAXI/GSC detection of a probable XRF
  48. GRB 100213B: Detection of Fading Optical Afterglow
  49. GRB 100625A: Fermi GBM detection
  50. GRB 100628A: Second epoch of Magellan near-IR observations
  51. GRB 100628A: GROND optical/NIR observations of the host candidate
  52. GRB 100628A: Gemini North Observations
  53. GRB 100628A: Coincidence of source "G1" with revised XRT error circle
  54. GRB 100628A: Swift XRT refined position
  55. GRB100625A: GROND confirmation of constant source
  56. GRB 100625A Gemini-South 2nd epoch imaging
  57. GRB100628A : MOA optical upper limit
  58. GRB 090709A: Host galaxy detection
  59. GRB 100628A: Magellan near-IR observations
  60. GRB 100628A: Swift/UVOT Upper Limits
  61. GRB100628A: RTT150 optical observations
  62. GRB 100628A: Swift XRT detection of a possible X-ray afterglow
  63. GRB 100628A: INTEGRAL SPI-ACS light curve
  64. GRB 100625A: Magellan near-IR Observations
  65. GRB 100628A: Swift-BAT refined analysis
  66. GRB 100628A: Swift detection of a short hard burst
  67. Swift-BAT trigger 426048 is not a burst
  68. GRB 100614A: CrAO optical limit
  69. GRB 100625A: Swift/UVOT Upper Limits
  70. GRB 100625A: Swift-BAT refined analysis
  71. Konus-Wind observation of GRB 100625A
  72. GRB 100625A : IRSF/SIRIUS NIR upper limit
  73. GRB 100625A: Swift-XRT Team refined analysis
  74. GRB 100625A: Gemini candidate afterglow
  75. GRB 100625A: Enhanced Swift-XRT position
  76. GRB100625A : MOA optical upper limit
  77. GRB 100625A: Swift detection of a short hard burst
  78. GRB 100418A: late time optical observations
  79. Konus-Wind observation of GRB 100621A
  80. GRB 100621A: IRSF/SIRIUS NIR Observation
  81. GRB 100621A MOA-II optical limit
  82. GRB 100619A: Correction to the Fermi GBM trigger time
  83. GRB 100621A: Swift/UVOT observations
  84. GRB 100621A: Swift XRT refined analysis
  85. GRB 100621A: VLT/X-shooter redshift
  86. GRB 100621A: Swift-BAT refined analysis
  87. GRB 100621A: GROND observation of bright NIR afterglow
  88. GRB 100621A: Enhanced Swift-XRT position
  89. GRB 100621A: Prompt enhanced Swift-XRT position
  90. GRB 100621A: ROTSE-III Optical Limits
  91. GRB 100621A: Swift detection of a burst
  92. GRB 100606A: Optical Limits
  93. GRB 100619A: Fermi GBM detection
  94. GRB 100619A: Swift/UVOT Upper Limits
  95. GRB 100619A: Swift-XRT refind analysis
  96. GRB 100619A: Enhanced Swift-XRT position
  97. GRB 100619A: Swift-BAT refined analysis
  98. GRB 100619A: Swift detection of a burst
  99. GRB 100614A: Gemini/NIRI Observations
  100. GRB 100615A: Gemini/NIRI Observations

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