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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"

32769 results found.

  1. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  2. GRB 070129: afterglow confirmation
  3. GRB070124: Swift-XRT Follow-up Observation
  4. GRB070126: Swift-XRT Observation
  5. GRB 070125: further AAVSO optical observations
  6. GRB 070129: Swift/UVOT Upper limits
  7. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  8. GRB 070125: optical observation
  9. GRB 070125: WSRT Radio Detection
  10. GRB070129: MITSuME optical observation
  11. Radio detection of GRB 070125
  12. GRB061217: MAGIC telescope GeV observation
  13. GRB 070129, Swift-BAT refined analysis of a particularly long
  14. GRB 070129: Xinglong TNT optical Upper Limit
  15. GRB 070129: Swift-XRT Refined Analysis
  16. GRB 070129: VLT observations
  17. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  18. GRB 070126: Swift/UVOT refined analysis
  19. GRB 070125: further AAVSO optical observations
  20. GRB 070125: MITSuME Okayama optical observation
  21. Konus-Wind observation of GRB 070125
  22. GRB 070125: AAVSO optical observations
  23. GRB 070125: optical observations
  24. GRB 070126: VLT observations
  25. GRB070126: Swift-XRT possible detection of an afterglow
  26. GRB 070125: PROMPT detections
  27. GRB 070124: Suzaku WAM observation of the prompt emissions
  28. GRB 070125: WSRT Radio Observations
  29. GRB 070125: UVOT Detection in Ultraviolet Filters
  30. GRB 070126, Swift-BAT refined analysis of a very faint burst
  31. GRB070125: Optical observation by Kanata
  32. GRB070124: Swift-XRT Observation
  33. Possible GRB 070126: Swift/UVOT Upper Limit
  34. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  35. GRB 070125: Continued P60 Observations
  36. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  37. GRB 070125: Lick 3m Spectroscopy
  38. GRB070125: Swift-XRT Refined Analysis
  39. GRB 070125: SARA detection in R
  40. GRB 070125: P60 Optical Afterglow Candidate
  41. RHESSI Spectrum of GRB070125
  42. Konus-Wind observation of short hard GRB 070124
  43. GRB 070110: optical break
  44. Swift-BAT trigger 257213 is a Galactic Center transient
  45. GRB 070110: Continued Detection and Request for Ground Followup
  46. GRB 070110: Ep,i - Eiso correlation
  47. GRB 070107: Suzaku WAM observation of the prompt emission
  48. GRB 070110: VLT R-band photometry
  49. GRB 070110 declared a "Burst of Interest" by Swift team
  50. Further Retractions of previous Swift-BAT triggers
  51. GRB 070110: VLT absorption redshift
  52. GRB 070110: UVOT Observations of a Candidate Afterglow
  53. GRB070110: Swift XRT Team refined analysis
  54. GRB 070110, Swift-BAT refined analysis
  55. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  56. GRB070107: Swift/XRT refined analysis
  57. GRB 070107: Possible UVOT Afterglow
  58. GRB 070107, Swift-BAT refined analysis
  59. GRB 070107: Swift/XRT position
  60. VLA observation of GRB 061222B
  61. VLA detection of GRB 061222A
  62. GRB070103: APO SPIcam i' and z' limits
  63. GRB 061201: Nearby Galaxy Cluster Abell 995 is at z=0.0865
  64. GRB070103: KPNO 4m+FLAMINGOS J limit
  65. GRB 070103: Swift/UVOT Upper limits
  66. GRB070103: Swift XRT refined analysis
  67. GRB 070103, Swift-BAT refined analysis
  68. GRB 070103: NOT observations
  69. Retractions of previous Swift-BAT triggers
  70. GRB061222a: optical observations
  71. Konus-Wind observation of GRB 061222A
  72. GRB 061210: Swift/XRT Astrometry Correction
  73. GRB 050826: MDM Redshift
  74. GRB 061222B: TAROT La Silla observatory early optical observations
  75. GRB 061218: TAROT La Silla observatory early optical observations
  76. GRB 061222A: MITSuME Akeno optical upper limits
  77. GRB 061222A: Confirmation of Gemini Afterglow Candidate
  78. GRB 061222B: MITSuME Akeno optical upper limits
  79. GRB 061222A: Gemini Afterglow Candidate
  80. GRB 061222B, Swift-BAT refined analysis
  81. GRB061222A Swift/UVOT: Upper Limits
  82. GRB 061222B: Swift/UVOT Upper limits
  83. GRB 061222B: Observation with the KANATA 1.5m telescope
  84. GRB061222B: Swift-XRT Refined Analysis
  85. GRB 061222A: Observation with the KANATA 1.5m telescope
  86. GRB 061222B: BOOTES-IR optical observations
  87. GRB 061222B: SARA upper limit
  88. GRB 061222A: Swift-XRT refined analysis
  89. GRB 061217: Magellan host galaxy redshift
  90. GRB 061222A, Swift-BAT refined analysis
  91. GRB 061222B: REM NIR/optical observations
  92. GRB 061222b, SMARTS optical/IR afterglow observations
  93. GRB 061222B: TAROT La Silla observatory afterglow observation
  94. GRB 061222b: Magellan redshift
  95. GRB 061222B: Swift detection of a burst
  96. GRB 061222A: Prompt ROTSE-III Optical Limits
  97. GRB 061201: Magellan redshift of nearby galaxy
  98. GRB 061217: Confirmation of host candidate
  99. GRB 061217: Object ib GCN 5948 is a star
  100. GRB 061217: Extended object in the revised XRT error circle

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