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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"

39489 results found.

  1. GRB 140512A: Mondy optical detection
  2. GRB 140512A: MASTER OT decay and early light curve
  3. GRB 140512A: Swift detection of a burst with an optical counterpart
  4. GRB 140512A: MASTER optical observations
  5. GRB 140423A: Mondy optical observations
  6. GRB 140508A: Continued RATIR Optical and NIR Observations
  7. GRB 140508A: ​HCT spectroscopy
  8. GRB 140508A: Swift/UVOT Detection
  9. GRB 140509B: MAXI/GSC detection
  10. GRB 140509A: Swift/UVOT Detection and photo-z
  11. GRB 140509A: Swift-BAT refined analysis
  12. VHE gamma-ray observations by MAGIC of SWIFT Trigger 596958
  13. GRB 140509A: Swift-XRT refined Analysis
  14. GRB 140508A: RATIR Optical and NIR Observations
  15. GRB 140508A: Optical Observations via Virtual Telescope
  16. Konus-Wind observation of GRB 140508A
  17. GRB 140509A: Enhanced Swift-XRT position
  18. GRB 140508A: Swift-XRT observations
  19. GRB 140508A: WHT spectroscopy
  20. GRB 140509A: Swift detection of a burst with an optical counterpart
  21. GRB 140508A: NOT photometry and spectroscopy
  22. GRB 140508A: SAO RAS and MASTER photometric and spectroscopic observations
  23. GRB 140508A: 1.23m CAHA BVRI-band observations
  24. GRB 140508A: iPTF optical transient candidate
  25. IPN triangulation of GRB 140508A
  26. GRB 140508A: Fermi GBM detection
  27. Konus-Wind observation of GRB 140506A
  28. GRB 140430A: MITSuME Akeno upper limits
  29. GRB 140502A: ISON-NM early optical limit
  30. GRB 140506A: Fermi GBM Detection
  31. GRB 140506A: Swift/UVOT Detection
  32. GRB 140506A: Swift-BAT refined analysis
  33. GRB 140506A: VLT/X-shooter spectroscopy
  34. GRB 140506A: Swift-XRT refined Analysis
  35. GRB 140506A: Enhanced Swift-XRT position
  36. GRB 140506A: Swift detection of a burst with an optical counterpart
  37. Konus-Wind observation of GRB 140423A
  38. GRB 140430A: iTelescope.Net T16 Optical Observation
  39. GRB 140430A: r'-band STELLA-I observations
  40. GRB 140502A: Swift/UVOT Upper Limits
  41. GRB 140502A: MITSuME Okayama upper limits
  42. GRB 140502A: Swift-BAT refined analysis
  43. GRB 140502A: Swift-XRT refined Analysis
  44. GRB 140502A: Enhanced Swift-XRT position
  45. GRB 140430A: BVR-band IAC80 observations
  46. Swift Trigger 597860 is probably not a GRB
  47. GRB 140502A: Fermi GBM observation
  48. GRB 140502A: Swift detection of a burst
  49. GRB 140430A: Further VATT Optical Observations
  50. GRB 140430A: Swift-BAT refined analysis
  51. GRB 140501A: Fermi GBM detection
  52. GRB 140430A: Swift/UVOT Observations
  53. GRB 140430A: Swift-XRT refined Analysis
  54. GRB 140430A: VATT Optical Observations
  55. GRB 140430A: Enhanced Swift-XRT position
  56. GRB 140430A: VLT/X-shooter redshift
  57. GRB 140430A: NOT optical observations
  58. GRB 140430A : Liverpool Telescope optical afterglow observations
  59. GRB 140428A: GROND observations
  60. GRB140430A: Swift detection of a burst with an optical counterpart
  61. GRB 140428B: Fermi GBM observation
  62. Konus-Wind observation of GRB 140428B
  63. GRB 140428A: Swift/UVOT Upper Limits
  64. GRB 140428A: Swift-BAT refined analysis
  65. GRB 140423A: RTT150 optical observations
  66. IPN Triangulation of GRB 140428B (short/hard)
  67. Trigger 597570: Swift detection of SGR 1806-20
  68. GRB 140428A: 1.5m OSN I-band detection
  69. GRB 140428A: Keck redshift estimate
  70. GRB 140428A: Keck detection of a red optical afterglow candidate
  71. GRB 140428A: NOT observations
  72. GRB 140428A: Swift-XRT detection of a source
  73. GRB 140428A: Swift Detection of a Possible Burst
  74. GRB 140423A: MITSuME Akeno upper limits
  75. GRB 140423A Third epoch pODI photometry
  76. GRB 140423A: Continued RATIR Optical and NIR Observations
  77. GRB 140423A: MITSuME Akeno Optical observation
  78. GRB 140413A: GROND Afterglow Confirmation
  79. DG CVn: optical observations
  80. GRB 140423A: RATIR Optical and NIR Observations
  81. GRB 140423A: NOT Afterglow Observations
  82. GRB 140419A: Continued Mondy optical observations
  83. GRB 140423A: Nishi-Harima NIR Observations
  84. GRB 140423A: TNG NIR observations
  85. GRB 140423A pODI/WIYN afterglow photometry
  86. GRB 140423A, Optical Observations
  87. GRB 140423A: Kanata/HONIR Optical and NIR Observations
  88. GRB 140423A: Swift-XRT refined Analysis
  89. GRB 140423A: Swift-BAT refined analysis
  90. GRB 140423A: MITSuME Okayama Optical Observation
  91. Swift Trigger 596958 is positionally consistent with V* DG CVn/2XMM J133146.4+291635
  92. Swift Trigger 596958 is probably the flare star: DG CVn
  93. GRB 140423A: Further Observations with Swift/UVOT
  94. GRB 140423A: KAIT Optical Detection
  95. GRB 140423A: Enhanced Swift-XRT position
  96. GRB 140423A: Nanshan optical upper limit
  97. GRB 140423A: P60 Observations
  98. GRB 140423A: Fermi GBM observation
  99. GRB 140423A: KWFC z-band photometry
  100. GRB 140423A: Gemini-N redshift

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