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"

36088 results found.

  1. GRB 110223B: Swift-XRT refined Analysis
  2. GRB 110223A: Enhanced Swift-XRT position
  3. GRB 110223B: Enhanced Swift-XRT position
  4. GRB 110223B: Swift-BAT refined analysis
  5. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  6. GRB 110223A: Observations from BOOTES-2
  7. GRB 110223B: Swift detection of a burst
  8. GRB 110223A: Swift detection of a burst
  9. GRB 101225A, the review of the sky area in plate archives
  10. OT 110215: Further NIR observations from NOT of the GRB candidate
  11. GRB 110213B: Swift/UVOT observations
  12. GRB110213B: X-ray afterglow confirmation
  13. Swift XRT and UVOT Observations of OT 110215
  14. OT 110215: NIR observations from NOT of GRB candidate
  15. GRB 110213A: optical observations in CrAO
  16. GRB 110213B: GROND observations of the optical/NIR afterglow
  17. GRB 110213A: optical observations in Mondy
  18. Fermi GBM trigger 319534757 (110216319) is not a GRB
  19. GRB110205A: EVLA Observations
  20. OT 110215: possible GRB from 2MASS J00264184+8324093
  21. Swift/UVOT observations of GRB110210a.
  22. GRB 110210A: optical upper limit
  23. GRB 110213B: Gemini South Redshift
  24. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  25. GRB 110210A: ROVOR Upper Limit
  26. GRB 110213A: YNAO-GMG Observations
  27. GRB 110213B: P60 Optical Afterglow Candidate
  28. GRB 110213A: TNT optical observations
  29. GRB 110212A: Swift XRT and UVOT observations
  30. GRB 110213A: Fermi GBM observation
  31. GRB 110205A: Konkoly optical observations
  32. GRB 110213B: Swift XRT observation
  33. GRB 110213A: MITSuME Akeno Optical Observation
  34. Konus-Wind observation of GRB 110213A
  35. Konus-Wind observation of GRB 110213B
  36. GRB 110213A: Swift-XRT refined Analysis
  37. GRB 110213B: MAXI/GSC refined analysis
  38. GRB110213A: MITSuME Okayama Optical Observation
  39. GRB 110213A: Swift/UVOT refined analysis
  40. GRB 110213A: THO optical observations
  41. GRB 110213B: MAXI/GSC detection of a probable GRB
  42. GRB 110213A: Lightbuckets Optical Observations
  43. GRB 110213A, Swift-BAT refined analysis
  44. GRB 110213A: optical observations
  45. GRB 110213A: Enhanced Swift-XRT position
  46. GRB110212A: MITSuME Okayama optical upper limits
  47. GRB 110213A: KAIT observations
  48. GRB 110213A: GRAS011 optical observations
  49. GRB 110213A: Bok Telescope Redshift
  50. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  51. GRB 110213A: P60 Optical Afterglow Detection
  52. GRB 110213A: Swift detection of a burst with optical afterglow
  53. GRB 110212A: GRT Optical Observation
  54. GRB 110212A, Swift-BAT refined analysis
  55. GRB 110212A: SARA-N Optical Limits
  56. GRB110212A: BOOTES-2/TELMA optical limits
  57. GRB 110212A: ROTSE-III Optical Limits
  58. GRB 110212A: Swift detection of a burst
  59. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  60. Konus-Wind observation of GRB 110205A (correction to GCN 11659)
  61. GRB 110205A: detection of optical linear polarization from CAHA
  62. GRB 110207A: Suzaku WAM observation of the prompt emission
  63. GRB 110210A: optical upper limit
  64. GRB 110210A: Swift-XRT refined Analysis
  65. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  66. GRB 110210A: Swift-BAT refined analysis
  67. GRB 110210A: Enhanced Swift-XRT position
  68. GRB 110201A: optical observations
  69. GRB 110210A: Swift detection of a burst
  70. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  71. GRB 110208A: Magellan confirmation of the optical afterglow
  72. Swift/UVOT observations of GRB110208a
  73. GRB 110205A: Suzaku WAM observation of the prompt emission
  74. GRB 110208A: Potential afterglow from Magellan
  75. GRB 110207A: Swift-XRT observations
  76. GRB 110208A: Swift-XRT refined Analysis
  77. GRB 110208A: Enhanced Swift-XRT position
  78. GRB 110208A: Swift-BAT refined analysis
  79. GRB 110208A: Magellan optical observations
  80. GRB 110206A: SMARTS optical/IR afterglow decay
  81. GRB 110208A: Swift detection of a burst
  82. GRB 110205A: optical observations in Mondy observatory
  83. GRB 110207A: Fermi GBM observation
  84. GRB 110205A : HCT optical observations
  85. GRB 110206A: Decay of afterglow candidate
  86. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  87. GRB 110207A: TAROT Calern observatory optical observations
  88. GRB 110205A - Continued PAIRITEL NIR Observations
  89. GRB 110206A: GROND detection of afterglow candidate
  90. GRB 110207A: Swift-BAT refined analysis
  91. GRB 110205A: WSRT radio observation
  92. GRB 110206A: UVOT detection of afterglow candidate
  93. GRB 110207A: MASTER prompt and early optical observations
  94. Konus-Wind observation of GRB 110205A
  95. GRB 110207A: Swift detection of a burst
  96. GRB 110206A: Swift detection of a probable X-ray afterglow
  97. GRB 110206A: TAROT La Silla observatory optical observations
  98. GRB 110205A: Lightbuckets Optical Observations
  99. GRB 110206A: a long GRB detected by INTEGRAL
  100. GRB 110205A : Lulin optical observation

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