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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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"

45418 results found.

  1. GRB 130521A: Skynet/PROMPT observations
  2. IPN Triangulation of GRB 130521B
  3. GRB 130514B: Further Swift-XRT Observations
  4. GRB 130518B, Swift-BAT refined analysis
  5. GRB 130521A, Swift-BAT refined analysis
  6. GRB 130521A: TAROT La Silla observatory optical observations
  7. GRB 130521A: Swift detection of a burst
  8. Swift XRT observation of GRB 130518B
  9. GRB 130518A: mm detection at PdBI
  10. GRB 130515A: Suzaku WAM observation of the prompt emission
  11. GRB 130518A: Gemini Redshift confirmation
  12. GRB 130427A / SN 2013cq: Hubble Space Telescope Observations
  13. GRB 130518A: 10.4m GTC/OSIRIS redshift
  14. GRB 130518A: Continued RATIR Optical Observations - Fading
  15. Correction to GCN Circular 14682 (GRB 130518B)
  16. GRB 130518B found in ground analysis of Swift-BAT data
  17. GRB 130518A: Confirmation of the X-ray afterglow.
  18. GRB 130518A: P60 Afterglow Observations
  19. GRB 130518A: RATIR Optical and NIR Observations
  20. GRB 130518A: Swift XRT and UVOT possible afterglow
  21. Konus-Wind observation of GRB 130518A
  22. GRB 130518A Swift-BAT position from ground analysis
  23. GRB 130518A: Fermi LAT detection
  24. GRB 130518A: Fermi GBM detection
  25. VLT observations of GRB 130427A
  26. GRB 130427A: Konkoly optical observations
  27. GRB 130515A: IRSF NIR Observation
  28. GRB 130515A: Further Gemini Observations
  29. GRB 130427A:: BTA spectroscopic observations on May 10/11.
  30. Konus-Wind observation of GRB 130515A
  31. GRB 130515A: FORS2 spectroscopy of candidate counterpart
  32. GRB 130427A: Continued RATIR Optical and NIR Observations - Photometric Evidence for a New Component
  33. GRB 130514B: RATIR Optical and NIR Observations
  34. Fermi GBM trigger 390275038 / 130515072 is not a GRB
  35. GRB 130515A: Fermi GBM detection
  36. GRB 130427A: Skynet detections of a possible supernova
  37. GRB 130515A: Swift-XRT refined Analysis
  38. GRB 130515A: Swift/UVOT Upper Limits
  39. GRB 130514B Swift-BAT observations
  40. GRB 130515A: Swift-BAT refined analysis
  41. GRB 130514B: GROND observations
  42. GRB 130515A: Gemini/GMOS Observations
  43. GRB 130515A: GROND Observations
  44. GRB 130515A: Enhanced Swift-XRT position
  45. GRB 130515A: VLT acquisition observation
  46. GRB 130511A: SSO 2.3m observation
  47. GRB 130514B: Swift-XRT Observations
  48. GRB 130515A: Swift detection of a short burst
  49. GRB 130514A: Swift-XRT refined Analysis
  50. GRB 130514A: Skynet/PROMPT/DSO Detections
  51. GRB 130513A: Bassano Bresciano optical upper limit
  52. GRB 130427A: Spectroscopic detection of the SN from the 10.4m GTC
  53. GRB 130427A: optical observations
  54. GRB130514B: MASTER-Net optical observations.
  55. GRB 130514A: RATIR Optical and NIR Observations
  56. GRB 130513A: RATIR Optical and NIR Observations
  57. GRB 130513A: Swift/UVOT Upper Limits
  58. GRB 130514A: Swift/UVOT Upper Limits
  59. GRB 130513A: GROND observations
  60. GRB 130514B: a long GRB detected by INTEGRAL
  61. GRB 130514A: Enhanced Swift-XRT position
  62. GRB 130514A: Swift-BAT refined analysis
  63. GRB 130513A: Swift-XRT detection of the afterglow.
  64. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  65. GRB 130514A: P60 Observations
  66. GRB 130514A: Swift detection of a burst
  67. GRB 130427A: Tautenburg 2nd epoch: No break, no clear SN
  68. GRB 130513A: a long GRB detected by INTEGRAL
  69. GRB130508A: MASTER-Net optical observations
  70. GRB130511A: SOAO Optical Observation
  71. GRB 130511A: Swift-XRT refined Analysis
  72. GRB 130511A: Kanata/HOWPol optical observation
  73. GRB 130511A: MITSuME Okayama upper limits
  74. GRB 130511A, Swift-BAT refined analysis
  75. GRB 130511A: Upper limit by Xinglong TNT optical observation
  76. GRB 130511A: Enhanced Swift-XRT position
  77. GRB 130511A: Gemini-North Redshift
  78. GRB 130511A: Swift detection of a burst with an optical counterpart
  79. GRB 130508A: Swift/UVOT Upper Limits
  80. GRB 130508A: MITSuME Akeno upper limits
  81. GRB 130427A: host galaxy observations
  82. GRB 130508A: RATIR Optical and NIR Observations
  83. GRB 130427A: Keck/LRIS Observations
  84. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  85. GRB 130508A, Swift-BAT refined analysis
  86. GRB 130508A: MITSuME Okayama upper limits
  87. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  88. GRB130508A: BOOTES-3 optical limit
  89. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  90. GRB 130508A: Swift detection of a probable burst
  91. GRB 130427A: Continued RATIR Optical and NIR Observations
  92. GRB 130427A, LBT optical spectrum
  93. GRB 130505B: Further Swift observations
  94. GRB 130504C: Swift-XRT afterglow confirmation
  95. GRB 130505A: MITSuME Akeno Optical observation
  96. GRB 130504C: Suzaku WAM observation of the prompt emission
  97. GRB 130504B: Suzaku WAM observation of the prompt emission
  98. GRB 130505A: Suzaku WAM observation of the prompt emission
  99. GRB 130427A, Watcher afterglow detection
  100. GRB 130427A: Excess optical emission consistent with an emerging supernova

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