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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"

42309 results found.

  1. GRB 070209: Swift detection of a short hard burst
  2. GRB 070208: Swift XRT refined analysis
  3. GRB 070208: RAPTOR detection of early afterglow onset
  4. GRB070208: Absorption and emission redshift from Gemini
  5. GRB 070208: MDM Optical Decay
  6. GRB 070208, Swift-BAT refined analysis
  7. GRB070208 - SDSS Pre-Burst Observations
  8. GRB 070208: Early IR detection and afterglow astrometry
  9. GRB 070208: Afterglow confirmation from P60
  10. GRB 070208: ROTSE-III Optical Limits
  11. GRB 070208: MDM Observations
  12. GRB 070208: Swift detection of a burst
  13. GRB 070125 detection with CARMA
  14. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  15. GRB 070129: afterglow confirmation
  16. GRB070124: Swift-XRT Follow-up Observation
  17. GRB070126: Swift-XRT Observation
  18. GRB 070125: further AAVSO optical observations
  19. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  20. GRB 070125: optical observation
  21. GRB 070125: WSRT Radio Detection
  22. GRB070129: MITSuME optical observation
  23. Radio detection of GRB 070125
  24. GRB061217: MAGIC telescope GeV observation
  25. GRB 070125: confirmation of pseudo-redshift
  26. GRB 070129, Swift-BAT refined analysis of a particularly long
  27. GRB 070129: Xinglong TNT optical Upper Limit
  28. GRB 070129: Swift-XRT Refined Analysis
  29. GRB 070129: VLT observations
  30. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  31. GRB 070129: Swift detection of a burst
  32. GRB 070126: Swift/UVOT refined analysis
  33. GRB 070125: further AAVSO optical observations
  34. GRB 070125: MITSuME Okayama optical observation
  35. Konus-Wind observation of GRB 070125
  36. GRB 070125: AAVSO optical observations
  37. GRB 070125: optical observations
  38. GRB 070126: VLT observations
  39. GRB070126: Swift-XRT possible detection of an afterglow
  40. GRB 070125: PROMPT detections
  41. GRB 070124: Suzaku WAM observation of the prompt emissions
  42. GRB 070125: WSRT Radio Observations
  43. GRB 070125: UVOT Detection in Ultraviolet Filters
  44. GRB 070126, Swift-BAT refined analysis of a very faint burst
  45. GRB070125: Optical observation by Kanata
  46. GRB070124: Swift-XRT Observation
  47. Possible GRB 070126: Swift/UVOT Upper Limit
  48. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  49. GRB 070125: Xinglong TNT optical observations
  50. GRB 070125: Continued P60 Observations
  51. GRB 070125: pseudo-z~1.5 from spectral parameters of the prompt emission
  52. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  53. GRB 070125: Lick 3m Spectroscopy
  54. GRB070125: Swift-XRT Refined Analysis
  55. GRB 070125: SARA detection in R
  56. GRB 070125: P60 Optical Afterglow Candidate
  57. GRB 070126?: Swift detection of a possible burst
  58. GRB070125 redshift request
  59. RHESSI Spectrum of GRB070125
  60. IPN-BAT localization of GRB070125 (very long duration, intense)
  61. Konus-Wind observation of short hard GRB 070124
  62. IPN localization of GRB070124 (short duration, hard spectrum)
  63. GRB 070110: optical break
  64. Swift-BAT trigger 257213 is a Galactic Center transient
  65. GRB 070110: Continued Detection and Request for Ground Followup
  66. GRB 050904: Second Epoch of HST/NICMOS Observations
  67. GRB 070110: Ep,i - Eiso correlation
  68. GRB 070107: Suzaku WAM observation of the prompt emission
  69. GRB 070110: VLT R-band photometry
  70. GRB 070110 declared a "Burst of Interest" by Swift team
  71. Further Retractions of previous Swift-BAT triggers
  72. Trigger 255685: Swift detection of a possible burst
  73. GRB 070110: VLT absorption redshift
  74. GRB 070110: UVOT Observations of a Candidate Afterglow
  75. GRB070110: Swift XRT Team refined analysis
  76. GRB 070110, Swift-BAT refined analysis
  77. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  78. GRB 070110: Swift detection of a burst with a possible optical afterglow
  79. GRB070107: Swift/XRT refined analysis
  80. GRB 070107: Possible UVOT Afterglow
  81. GRB 070107, Swift-BAT refined analysis
  82. GRB 070107: Swift/XRT position
  83. GRB 070107: Swift detection of a burst
  84. GRB070103: APO SPIcam i' and z' limits
  85. GRB 061201: Nearby Galaxy Cluster Abell 995 is at z=0.0865
  86. GRB070103: KPNO 4m+FLAMINGOS J limit
  87. GRB070103: Swift XRT refined analysis
  88. GRB 070103, Swift-BAT refined analysis
  89. GRB 070103: NOT observations
  90. GRB 070103: TAROT Calern observatory optical observations
  91. GRB 070103: Swift detection of a burst
  92. Retractions of previous Swift-BAT triggers
  93. GRB061222a: optical observations
  94. erratum : SDSS Pre-burst Observations of GRB061126
  95. Konus-Wind observation of GRB 061222A
  96. GRB 061210: Swift/XRT Astrometry Correction
  97. GRB 050826: MDM Redshift
  98. GRB 061222B: TAROT La Silla observatory early optical observations
  99. GRB 061218: TAROT La Silla observatory early optical observations
  100. GRB 061222A: MITSuME Akeno optical upper limits

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