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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"

32763 results found.

  1. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  2. GRB 070125: optical observation
  3. GRB 070125: WSRT Radio Detection
  4. GRB070129: MITSuME optical observation
  5. Radio detection of GRB 070125
  6. GRB061217: MAGIC telescope GeV observation
  7. GRB 070129, Swift-BAT refined analysis of a particularly long
  8. GRB 070129: Xinglong TNT optical Upper Limit
  9. GRB 070129: Swift-XRT Refined Analysis
  10. GRB 070129: VLT observations
  11. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  12. GRB 070126: Swift/UVOT refined analysis
  13. GRB 070125: further AAVSO optical observations
  14. GRB 070125: MITSuME Okayama optical observation
  15. Konus-Wind observation of GRB 070125
  16. GRB 070125: AAVSO optical observations
  17. GRB 070125: optical observations
  18. GRB 070126: VLT observations
  19. GRB070126: Swift-XRT possible detection of an afterglow
  20. GRB 070125: PROMPT detections
  21. GRB 070124: Suzaku WAM observation of the prompt emissions
  22. GRB 070125: WSRT Radio Observations
  23. GRB 070125: UVOT Detection in Ultraviolet Filters
  24. GRB 070126, Swift-BAT refined analysis of a very faint burst
  25. GRB070125: Optical observation by Kanata
  26. GRB070124: Swift-XRT Observation
  27. Possible GRB 070126: Swift/UVOT Upper Limit
  28. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  29. GRB 070125: Continued P60 Observations
  30. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  31. GRB 070125: Lick 3m Spectroscopy
  32. GRB070125: Swift-XRT Refined Analysis
  33. GRB 070125: SARA detection in R
  34. GRB 070125: P60 Optical Afterglow Candidate
  35. RHESSI Spectrum of GRB070125
  36. Konus-Wind observation of short hard GRB 070124
  37. GRB 070110: optical break
  38. Swift-BAT trigger 257213 is a Galactic Center transient
  39. GRB 070110: Continued Detection and Request for Ground Followup
  40. GRB 070110: Ep,i - Eiso correlation
  41. GRB 070107: Suzaku WAM observation of the prompt emission
  42. GRB 070110: VLT R-band photometry
  43. GRB 070110 declared a "Burst of Interest" by Swift team
  44. Further Retractions of previous Swift-BAT triggers
  45. GRB 070110: VLT absorption redshift
  46. GRB 070110: UVOT Observations of a Candidate Afterglow
  47. GRB070110: Swift XRT Team refined analysis
  48. GRB 070110, Swift-BAT refined analysis
  49. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  50. GRB070107: Swift/XRT refined analysis
  51. GRB 070107: Possible UVOT Afterglow
  52. GRB 070107, Swift-BAT refined analysis
  53. GRB 070107: Swift/XRT position
  54. VLA observation of GRB 061222B
  55. VLA detection of GRB 061222A
  56. GRB070103: APO SPIcam i' and z' limits
  57. GRB 061201: Nearby Galaxy Cluster Abell 995 is at z=0.0865
  58. GRB070103: KPNO 4m+FLAMINGOS J limit
  59. GRB 070103: Swift/UVOT Upper limits
  60. GRB070103: Swift XRT refined analysis
  61. GRB 070103, Swift-BAT refined analysis
  62. GRB 070103: NOT observations
  63. Retractions of previous Swift-BAT triggers
  64. GRB061222a: optical observations
  65. Konus-Wind observation of GRB 061222A
  66. GRB 061210: Swift/XRT Astrometry Correction
  67. GRB 050826: MDM Redshift
  68. GRB 061222B: TAROT La Silla observatory early optical observations
  69. GRB 061218: TAROT La Silla observatory early optical observations
  70. GRB 061222A: MITSuME Akeno optical upper limits
  71. GRB 061222A: Confirmation of Gemini Afterglow Candidate
  72. GRB 061222B: MITSuME Akeno optical upper limits
  73. GRB 061222A: Gemini Afterglow Candidate
  74. GRB 061222B, Swift-BAT refined analysis
  75. GRB061222A Swift/UVOT: Upper Limits
  76. GRB 061222B: Swift/UVOT Upper limits
  77. GRB 061222B: Observation with the KANATA 1.5m telescope
  78. GRB061222B: Swift-XRT Refined Analysis
  79. GRB 061222A: Observation with the KANATA 1.5m telescope
  80. GRB 061222B: BOOTES-IR optical observations
  81. GRB 061222B: SARA upper limit
  82. GRB 061222A: Swift-XRT refined analysis
  83. GRB 061217: Magellan host galaxy redshift
  84. GRB 061222A, Swift-BAT refined analysis
  85. GRB 061222B: REM NIR/optical observations
  86. GRB 061222b, SMARTS optical/IR afterglow observations
  87. GRB 061222B: TAROT La Silla observatory afterglow observation
  88. GRB 061222b: Magellan redshift
  89. GRB 061222B: Swift detection of a burst
  90. GRB 061222A: Prompt ROTSE-III Optical Limits
  91. GRB 061201: Magellan redshift of nearby galaxy
  92. GRB 061217: Confirmation of host candidate
  93. GRB 061217: Object ib GCN 5948 is a star
  94. GRB 061217: Extended object in the revised XRT error circle
  95. GRB 061217, Candidate host galaxy
  96. GRB 061217 - Swift/XRT position correction
  97. GRB 061210: Possible Host Galaxy (S2-G2) Keck Spectrum
  98. GRB 061201: Correction to GCN 5944
  99. GRB 061201: Magellan Redshift of nearby Abell cluster
  100. GRB 061218: TAROT La Silla observatory optical observations

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