Skip to main content
JSON Notices via Email, Kafka Cron Jobs, Submitter Profile, GCN is Hiring. See news and announcements

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"

36347 results found.

  1. GRB 060522: REM NIR observations
  2. GRB 060522: TNG optical observations
  3. GRB 060522: Swift detection of a burst with possible optical afterglow
  4. GRB 060512: reanalysis of optical spectra
  5. GRB 060515: NIR observation
  6. GRB 060210: Jet Break in the XRT light curve
  7. GRB 060516: Refined analysis of the Swift-BAT burst
  8. GRB 060512: TNG optical spectroscopy
  9. GRB 060516: Swift detection of a burst
  10. GRB 060505 BAT refined analysis
  11. GRB 060515 BAT refined analysis
  12. GRB 060512: TAROT optical observation
  13. GRB 060515: Swift/XRT Team refined analysis
  14. GRB 060515: Swift/UVOT Upper Limits
  15. GRB 060515: Swift/XRT position
  16. GRB 060515: Super-LOTIS Observations
  17. GRB060515: Swift/UVOT initial observation
  18. GRB 060515: TAROT optical observation
  19. GRB 060515: ROTSE-III Optical Limits
  20. GRB 060515: Swift detection of a burst
  21. VLT optical spectroscopy of GRB 060512
  22. Swift/UVOT observations of GRB060512.
  23. GRB 060512: Subaru NIR observation
  24. GRB060512: Swift XRT Team refined analysis
  25. GRB 060512: 1.54m Kuiper Observations
  26. GRB 060512: Detection of NIR afterglow
  27. GRB 060512: P60 Observations
  28. GRB 060512: Swift-BAT Refined Analysis
  29. GRB 060505 - OT candidate + galaxy spectrum
  30. GRB 060512: optical decay
  31. GRB 060512: REM NIR observations
  32. GRB060512 - SDSS Pre-Burst Observations
  33. GRB060512 Name Correction: LT Afterglow detection
  34. GRB060512: Liverpool Telescope Afterglow detection
  35. GRB 060512: Swift detection of a burst with an optical afterglow
  36. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  37. GRB 060505: X-ray afterglow - Correction -
  38. GRB 060505: X-ray afterglow
  39. Konus-Wind observation of GRB 060510A
  40. GRB060418: optical observations
  41. GRB 060428a, SMARTS optical/IR afterglow detection
  42. GRB060510B: Swift XRT refined analysis
  43. GRB 060510B: Swift/UVOT Upper Limits
  44. GRB 060510A: Refined analysis of the Swift-BAT burst
  45. GRB 060510B: Swift-BAT Refined Analysis
  46. GRB060510A: XRT refined analysis
  47. GRB060510 - SDSS Pre-Burst Observations
  48. GRB 060510b: Redshift
  49. GRB060510B : Faulkes North Telescope detection
  50. GRB 060510B : Planned XMM-Newton observation
  51. GRB 060510b: Gemini NIR observations
  52. GRB 060510B: Super-LOTIS Observations
  53. GRB 060510b: NIR observations
  54. GRB 060510B: Coordinate correction
  55. GRB 060510B: MDM Observations and candidate OT
  56. GRB 060510B: Swift detection of a burst
  57. GRB 060510: Swift detection of a burst with optical transient
  58. GRB060507: optical afterglow detection
  59. GRB060502B: improvement in the XRT afterglow position
  60. GRB 060507: BART limit
  61. GRB 060507: Final Refined analysis of the Swift-BAT burst
  62. GRB 060507: Swift-BAT Refined Analysis
  63. GRB 060505: PROMPT Observations
  64. GRB 060507: Swift/UVOT Upper Limits
  65. GRB 060507: Swift XRT Team Refined Analysis
  66. GRB 060507: MDM Optical Upper Limit
  67. GRB060507: Swift XRT position
  68. GRB 060507: Swift detection of a burst
  69. GRB 060429: Suzaku WAM observation
  70. GRB 060505: Swift XRT Team Refined Analysis
  71. GRB060425: new MASTER survey method
  72. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  73. GRB 060505: Swift XRT afterglow canditate position
  74. GRB 060502b: Second epoch Gemini observations
  75. GRB 060505: Swift-BAT detection of a weak burst
  76. GRB 060428B: spectroscopy
  77. GRB 060502B: optical observations
  78. GRB 060502B: AROMA refined photometric calibration
  79. GRB 060502B MDM Follow-up Observation
  80. GRB 060502b: Gemini imaging and spectroscopy
  81. GRB060502A, optical observation
  82. GRB 060502B: Swift/UVOT upper limits
  83. GRB 060502A: Swift/UVOT source detection
  84. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  85. GRB 060502B: MDM Optical Observation
  86. GRB 060502B: AROMA optical observations
  87. GRB 060502B: Refined analysis of the Swift-BAT short burst
  88. Short GRB 060502B: Tautenburg Observation
  89. GRB 060427B Milagro GeV/TeV Observations
  90. GRB 060502A: TTT Observations
  91. GRB 060501: P60 Observations and Candidate Retraction
  92. GRB 060502B: Xinglong optical observation
  93. GRB 060502B: MASTER optical observations
  94. GRB 060502B: Swift detection of a short burst
  95. GRB 060502: Swift-BAT refined analysis
  96. GRB060502: Gemini spectroscopy
  97. GRB 060502: APO Spectroscopic Observations
  98. GRB 060502: P60 Afterglow Confirmation
  99. GRB 060502: Swift detection of a burst with an optical counterpart
  100. GRB 060501: MDM Observations

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov