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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"

32686 results found.

  1. GRB070208: optical observations
  2. GRB 070201: IPN constraints and nearby galaxies
  3. GRB 070201: Proximity of IPN annulus to M31
  4. GRB 070208: MARGE Optical Observations
  5. GRB 070209, Swift-BAT refined analysis of the short hard burst
  6. GRB 070208: Swift XRT refined analysis
  7. GRB 070208: RAPTOR detection of early afterglow onset
  8. GRB070208: Absorption and emission redshift from Gemini
  9. GRB 070208: MDM Optical Decay
  10. GRB 070208, Swift-BAT refined analysis
  11. GRB070208 - SDSS Pre-Burst Observations
  12. GRB 070208: Early IR detection and afterglow astrometry
  13. GRB 070208: Afterglow confirmation from P60
  14. GRB070208: Faulkes Telescope North Afterglow Identification
  15. GRB 070208: ROTSE-III Optical Limits
  16. GRB 070208: MDM Observations
  17. GRB 070125 detection with CARMA
  18. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  19. GRB 070129: afterglow confirmation
  20. GRB070124: Swift-XRT Follow-up Observation
  21. GRB070126: Swift-XRT Observation
  22. GRB 070125: further AAVSO optical observations
  23. GRB 070129: Swift/UVOT Upper limits
  24. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  25. GRB 070125: optical observation
  26. GRB 070125: WSRT Radio Detection
  27. GRB070129: MITSuME optical observation
  28. Radio detection of GRB 070125
  29. GRB061217: MAGIC telescope GeV observation
  30. GRB 070129, Swift-BAT refined analysis of a particularly long
  31. GRB 070129: Xinglong TNT optical Upper Limit
  32. GRB 070129: Swift-XRT Refined Analysis
  33. GRB 070129: VLT observations
  34. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  35. GRB 070126: Swift/UVOT refined analysis
  36. GRB 070125: further AAVSO optical observations
  37. GRB 070125: MITSuME Okayama optical observation
  38. Konus-Wind observation of GRB 070125
  39. GRB 070125: AAVSO optical observations
  40. GRB 070125: optical observations
  41. GRB 070126: VLT observations
  42. GRB070126: Swift-XRT possible detection of an afterglow
  43. GRB 070125: PROMPT detections
  44. GRB 070124: Suzaku WAM observation of the prompt emissions
  45. GRB 070125: WSRT Radio Observations
  46. GRB 070125: UVOT Detection in Ultraviolet Filters
  47. GRB 070126, Swift-BAT refined analysis of a very faint burst
  48. GRB070125: Optical observation by Kanata
  49. GRB070124: Swift-XRT Observation
  50. Possible GRB 070126: Swift/UVOT Upper Limit
  51. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  52. GRB 070125: Continued P60 Observations
  53. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  54. GRB 070125: Lick 3m Spectroscopy
  55. GRB070125: Swift-XRT Refined Analysis
  56. GRB 070125: SARA detection in R
  57. GRB 070125: P60 Optical Afterglow Candidate
  58. RHESSI Spectrum of GRB070125
  59. Konus-Wind observation of short hard GRB 070124
  60. GRB 070110: optical break
  61. Swift-BAT trigger 257213 is a Galactic Center transient
  62. GRB 070110: Continued Detection and Request for Ground Followup
  63. GRB 070110: Ep,i - Eiso correlation
  64. GRB 070107: Suzaku WAM observation of the prompt emission
  65. GRB 070110: VLT R-band photometry
  66. GRB 070110 declared a "Burst of Interest" by Swift team
  67. Further Retractions of previous Swift-BAT triggers
  68. GRB 070110: VLT absorption redshift
  69. GRB 070110: UVOT Observations of a Candidate Afterglow
  70. GRB070110: Swift XRT Team refined analysis
  71. GRB 070110, Swift-BAT refined analysis
  72. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  73. GRB070107: Swift/XRT refined analysis
  74. GRB 070107: Possible UVOT Afterglow
  75. GRB 070107, Swift-BAT refined analysis
  76. GRB 070107: Swift/XRT position
  77. VLA observation of GRB 061222B
  78. VLA detection of GRB 061222A
  79. GRB070103: APO SPIcam i' and z' limits
  80. GRB 061201: Nearby Galaxy Cluster Abell 995 is at z=0.0865
  81. GRB070103: KPNO 4m+FLAMINGOS J limit
  82. GRB 070103: Swift/UVOT Upper limits
  83. GRB070103: Swift XRT refined analysis
  84. GRB 070103, Swift-BAT refined analysis
  85. GRB 070103: NOT observations
  86. Retractions of previous Swift-BAT triggers
  87. GRB061222a: optical observations
  88. Konus-Wind observation of GRB 061222A
  89. GRB 061210: Swift/XRT Astrometry Correction
  90. GRB 050826: MDM Redshift
  91. GRB 061222B: TAROT La Silla observatory early optical observations
  92. GRB 061218: TAROT La Silla observatory early optical observations
  93. GRB 061222A: MITSuME Akeno optical upper limits
  94. GRB 061222A: Confirmation of Gemini Afterglow Candidate
  95. GRB 061222B: MITSuME Akeno optical upper limits
  96. GRB 061222A: Gemini Afterglow Candidate
  97. GRB 061222B, Swift-BAT refined analysis
  98. GRB061222A Swift/UVOT: Upper Limits
  99. GRB 061222B: Swift/UVOT Upper limits
  100. GRB 061222B: Observation with the KANATA 1.5m telescope

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