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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

24555 results found.

  1. LIGO/Virgo G211117: LOFAR follow-up
  2. GRB 160203A: MITSuME Akeno optical upper limits
  3. GRB 151215A: TAROT Calern observatory very early optical detection
  4. GRB 160203A: Swift-BAT refined analysis
  5. GRB 160206A: Swift-XRT observations
  6. GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  7. GRB 160203A: Skynet PROMPT-CTIO observations of the optical afterglow
  8. GRB 160203A: Swift-XRT refined Analysis
  9. GRB 160203A: TAROT La Silla - TAROT Calern - Zadko observations
  10. GRB 160203A: GROND Afterglow Candidate
  11. Konus-Wind observation of GRB 160131A
  12. GRB 160131A: MITSuME Ishigakijima Optical Observation
  13. GRB 160131A: Swift-XRT refined Analysis
  14. GRB 160131A: iTelescope optical observations
  15. GRB 160131A: Swift-BAT refined analysis
  16. GRB 160131A: Xinglong 60cm WFT optical observation
  17. GRB160131A: Xinglong TNT optical observation
  18. GRB160131.35 MASTER-Net OT detection
  19. GRB 160127A: MITSuME Akeno optical upper limits
  20. GRB 160127A: Swift-BAT refined analysis
  21. GRB 160127A: Swift-XRT refined Analysis
  22. GRB 160127A: Swift detection of a burst with an optical counterpart
  23. GRB 160123A: NOT J-band observations
  24. GRB 160123A: Swift-BAT refined analysis
  25. GRB 160121A: Swift-BAT refined analysis
  26. GRB 160121A: MASTER-Amur observations
  27. GRB 160121A: Swift detection of a burst
  28. Konus-Wind observation of GRB 160119A
  29. GRB 160119A: Swift-BAT refined analysis
  30. GRB 160117B: further NOT optical observations of the afterglow
  31. GRB 160119A: Swift-XRT refined Analysis
  32. GRB 160119A: NOT and GTC afterglow candidate
  33. LIGO/Virgo G211117: Refined localization from CBC parameter estimation
  34. GRB 160117A: Swift-XRT observations
  35. GRB 160117B: iTelescope T17 optical observations
  36. GRB 160117B: Swift-XRT refined Analysis
  37. GRB 160117A: Swift-BAT refined analysis
  38. GRB 160117B: MASTER-Amur OT observations
  39. Konus-Wind observation of GRB 160113A
  40. GRB 160117B: Swift detection of a burst with optical counterpart
  41. GRB 160117A: Swift detection of a burst
  42. IPN Triangulation of GRB 160113A
  43. Konus-Wind observation of GRB 160104B
  44. Konus-Wind observation of GRB 160102A
  45. Konus-Wind observation of GRB 151231A
  46. IPN Triangulation of GRB 160111A (short/hard)
  47. GRB 151225A: Correction to the trigger time of GCN 18724
  48. GRB 160113A: Fermi GBM detection
  49. GRB 160113A: iPTF P48 Observations and Optical Transient Candidates
  50. LIGO/Virgo G184098: Refined localizations from CBC parameter estimation
  51. Konus-Wind observation of GRB 160107A
  52. IPN Triangulation of GRB 151231A
  53. Konus-Wind observation of GRB 151229B
  54. IPN Triangulation of GRB 151229B (extremely intense/long)
  55. GRB 160107A: Fermi GBM observation
  56. LIGO/Virgo G211117: Pi of the Sky observations
  57. GRB 160104A: Continued MITSuME Akeno Optical Observation
  58. Konus-Wind observation of GRB 160101A
  59. Konus-Wind observation of GRB 151225A
  60. IPN Triangulation of GRB 151225A (short/hard)
  61. GRB 160104A: Nishi-Harima MINT Observations
  62. GRB 160104A: Swift-BAT refined analysis
  63. GRB 160104A: Fermi GBM observation
  64. GRB 160104A: Mini-GWAC upper limit during prompt emission phase
  65. GRB 160104A: GWAC upper limit during prompt emission phase
  66. GRB 160104A: MITSuME Okayama upper limits
  67. GRB 160104A: Xinglong TNT optical observation
  68. GRB 160104A: MASTER early OT detection
  69. GRB 160104A: MITSuME Okayama Ks-band upper-limit
  70. GRB 160104A: MITSuME Akeno Optical Observation
  71. LIGO/Virgo G211117: Fermi/LAT observations
  72. LIGO/Virgo G211117: Gemini classification of 7 Pan-STARRS transients
  73. LIGO/Virgo G211117: LOFAR follow-up
  74. GRB 160102A: Swift-XRT observations
  75. GRB 160101A: MITSuME Akeno optical upper limits
  76. LIGO/Virgo G211117: CSS/CRTS observations on 29/30 Dec 2015 UT
  77. GRB 160101B: Fermi-LAT detection
  78. GRB 160101B: Fermi GBM detection
  79. GRB 160101A: Fermi GBM observation
  80. GRB 160101A: Swift-XRT afterglow detection
  81. GRB 151231B: Fermi GBM observation
  82. GRB 151231A: Fermi GBM observation
  83. LIGO/Virgo G211117: 44 transients from Pan-STARRS data during 2015-12-28/30
  84. MASTER-NET observations of V404Cyg Swift Trigger 668877
  85. LIGO/Virgo G211117: Liverpool Telescope followup of EM candidates
  86. Konus-Wind observation of GRB 151227B
  87. Trigger 668879: Swift detection of V 404 Cyg again
  88. Trigger 668877: Swift detection of V 404 Cyg
  89. LIGO/Virgo G211117: INAF TNG follow-up of MASTER OT J020906.21+013800.1
  90. LIGO/Virgo G211117: OAO-WFC NIR follow-up observations
  91. IPN Triangulation of GRB 151227B
  92. GRB 151228A: Swift-XRT refined Analysis
  93. LIGO/Virgo G211117: MASTER Observations of the 3 iPTF candidates
  94. GRB 151229A: MITSuME Akeno optical upper limits
  95. LIGO/Virgo G211117: List of near-term future observation regions by Project Mini-GWAC of SVOM
  96. LIGO/Virgo G211117: iPTF Optical Transient Candidates
  97. GRB 151229A: MITSuME Okayama upper limits
  98. GRB 151228B: MITSuME Akeno optical upper limits
  99. GRB 151229A: Fermi GBM observation
  100. GRB 151228B: Fermi GBM observation

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