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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"

19697 results found.

  1. GRB 140518A: RATIR Optical and NIR Observations
  2. GRB 140518A: Gemini-N redshift
  3. GRB 140518A: Swift detection of a burst
  4. GRB 140516A: RATIR Optical and NIR Observations
  5. GRB 140516A: Subaru NIR imaging observations
  6. GRB 140516A: 6 GHz upper limit
  7. GRB 140516A: Gemini-North limit on an optical afterglow
  8. GRB 140516A: Swift/UVOT Upper Limits
  9. GRB 140516A: Swift-BAT refined analysis
  10. GRB 140516A: Swift-XRT refined Analysis
  11. GRB 140516A: NOT optical observations
  12. GRB 140516A: Enhanced Swift-XRT position
  13. GRB 140516A: ISON-Kislovodsk optical observations
  14. GRB 140516A: TNG optical observations
  15. GRB 140516A: Swift detection of a short burst
  16. GRB 140515A : TNG near-infrared observations
  17. GRB 140515A: GROND observation of the afterglow
  18. GRB 140515A: Gemini-North imaging
  19. GRB 140515A: Swift/UVOT Upper Limits
  20. GRB 140515A: MITSuME Akeno upper limits
  21. GRB 140515A: Enhanced Swift-XRT position
  22. GRB 140515A: Gemini-N redshift
  23. GRB 140515A: Swift detection of a burst
  24. GRB 140512A: Continued UVOT Observations
  25. GRB 140508A: Mondy upper limit
  26. GRB 140508A: MITSuME Akeno Optical observation
  27. GRB140512A : GROND observations
  28. GRB 140512A: Enhanced Swift-XRT position
  29. Swift Observations of GRB 140508A
  30. GRB 140512A: Optical observations from the 2.5 m NOT
  31. GRB 140428A: GROND afterglow confirmation
  32. GRB 140512A: Mondy optical detection
  33. GRB 140512A: Swift detection of a burst with an optical counterpart
  34. GRB 140508A: Continued RATIR Optical and NIR Observations
  35. Fermi GBM Trigger 140429551 - Detection of a burst from SGR 1806-20
  36. GRB 140508A: Swift/UVOT Detection
  37. GRB 140509A: Swift/UVOT Detection and photo-z
  38. GRB 140509A: Swift-XRT refined Analysis
  39. GRB 140508A: RATIR Optical and NIR Observations
  40. GRB 140508A: Optical Observations via Virtual Telescope
  41. GRB 140509A: Enhanced Swift-XRT position
  42. GRB 140508A: Swift-XRT observations
  43. GRB 140508A: WHT spectroscopy
  44. GRB 140509A: Swift detection of a burst with an optical counterpart
  45. GRB 140508A: 1.23m CAHA BVRI-band observations
  46. IPN triangulation of GRB 140508A
  47. GRB 140430A: MITSuME Akeno upper limits
  48. GRB 140502A: ISON-NM early optical limit
  49. GRB 140506A: Swift/UVOT Detection
  50. GRB 140506A: VLT/X-shooter spectroscopy
  51. GRB 140506A: Enhanced Swift-XRT position
  52. GRB 140506A: Swift detection of a burst with an optical counterpart
  53. GRB 140430A: iTelescope.Net T16 Optical Observation
  54. GRB 140430A: r'-band STELLA-I observations
  55. GRB 140502A: Swift/UVOT Upper Limits
  56. GRB 140502A: MITSuME Okayama upper limits
  57. GRB 140502A: Enhanced Swift-XRT position
  58. GRB 140430A: BVR-band IAC80 observations
  59. Swift Trigger 597860 is probably not a GRB
  60. GRB 140502A: Swift detection of a burst
  61. GRB 140430A: Further VATT Optical Observations
  62. GRB 140430A: Swift/UVOT Observations
  63. GRB 140430A: Enhanced Swift-XRT position
  64. GRB 140428A: GROND observations
  65. GRB140430A: Swift detection of a burst with an optical counterpart
  66. GRB 140428A: Swift/UVOT Upper Limits
  67. GRB 140423A: RTT150 optical observations
  68. Trigger 597570: Swift detection of SGR 1806-20
  69. GRB 140428A: 1.5m OSN I-band detection
  70. GRB 140428A: NOT observations
  71. GRB 140428A: Swift-XRT detection of a source
  72. GRB 140423A: Continued RATIR Optical and NIR Observations
  73. GRB 140423A: MITSuME Akeno Optical observation
  74. GRB 140413A: GROND Afterglow Confirmation
  75. DG CVn: optical observations
  76. GRB 140423A: RATIR Optical and NIR Observations
  77. GRB 140423A: NOT Afterglow Observations
  78. GRB 140423A: Nishi-Harima NIR Observations
  79. GRB 140423A: TNG NIR observations
  80. GRB 140423A pODI/WIYN afterglow photometry
  81. GRB 140423A, Optical Observations
  82. GRB 140423A: Kanata/HONIR Optical and NIR Observations
  83. GRB 140423A: MITSuME Okayama Optical Observation
  84. Swift Trigger 596958 is positionally consistent with V* DG CVn/2XMM J133146.4+291635
  85. Swift Trigger 596958 is probably the flare star: DG CVn
  86. GRB 140423A: Enhanced Swift-XRT position
  87. GRB 140423A: Nanshan optical upper limit
  88. GRB 140423A: KWFC z-band photometry
  89. GRB 140419A, LOAO R-band observations
  90. GRB 140423A: Swift-XRT observations
  91. GRB 140423A: optical afterglow candidate
  92. GRB 140419A: Mondy optical observations
  93. GRB 140419A: Continued RATIR Optical and NIR Observations
  94. GRB 140419A: Continued RATIR Optical and NIR Observations
  95. Swift Trigger 596641 is not a GRB
  96. GRB 140419A, Optical Observations
  97. GRB 140419A: MITSuME Ishigakijima Optical Observation
  98. GRB 140419A: MITSuME Okayama Optical Observation
  99. GRB 140419A: Swift UVOT refined analysis
  100. GRB 140419A: Enhanced Swift-XRT position

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