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"

32552 results found.

  1. GRB020625 (=H2081): A Long Burst Localized by HETE
  2. The Probable Host Galaxy of GRB/XRF 020427
  3. GRB/XRF 020427, detection of an underlying system with the VLT
  4. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  5. AXP 1E2259+586: quasi-simultaneous optical observation
  6. AXP 1E2259+586 optical observations
  7. Fading Optical Source in the Field of GRB020531
  8. GRB 020531, INT+WFC deep optical upper limits
  9. GRB020405: polarimetric observations
  10. GRB 020531, simultaneous optical observations
  11. GRB 020604, optical observations
  12. GRB 020531/Candidate Redshift
  13. GRB020531: Detection of Candidate Host Galaxy
  14. GRB020531: Second epoch Chandra observations
  15. GRB020604, optical observations
  16. GRB020604, BVRcIc field photometry
  17. GRB020603, BVRcIc field observations
  18. GRB020531, BVRcIc field photometry
  19. GRB020531 Optical observations with TAROT
  20. GRB020531 Optical observations with TAROT
  21. GRB 020531, Radio Observations
  22. GRB020531 Optical Observations
  23. GRB 020603: Optical Observations
  24. GRB 020603, R-band observation
  25. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  26. GRB020531: Upper Limit for Detection of Two TAROT Sources
  27. GRB 020603: Optical observations
  28. GRB 020531 optical observations with TAROT
  29. Refined IPN error box for GRB020531
  30. GRB020531, optical observations
  31. GRB020531: optical observations
  32. GRB020531(=H2042): Optical Observations
  33. IPN triangulation of the short, hard GRB020531 (=H2042)
  34. GRB020531(=H2042): Optical Observations
  35. GRB020531: Optical observations
  36. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  37. GRB 020525: Optical Observations
  38. GRB020525, optical observations
  39. IPN detection of possible bursts from SGR1806-20
  40. XRF 020427: Sudden Ionospheric Disturbance (SID)
  41. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  42. GRB/XRF 020427, Radio Observations
  43. HST detection of the likely host galaxy of GRB 020124
  44. GRB020405 field photometry at ESO
  45. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  46. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  47. GRB020321 : Optical observations.
  48. GRB020331: Third Epoch and Revised Second Epoch Optical
  49. GRB 020410, Radio Observations
  50. GRB 020418: Optical observations
  51. GRB 020124: Optical observations
  52. GRB 020418: Optical observations
  53. GRB020405: VLT observations of the OT environment
  54. GRB020410: BeppoSAX NFI observations refined analysis
  55. GRB 020409: Optical Observations
  56. Mars Odyssey joins the IPN
  57. GRB 020409, 2-nd epoch optical observations at Terskol.
  58. GRB020405: predicted break
  59. GRB 020409: Optical observations
  60. GRB 020409, No Optical Detection to R = 22
  61. GRB 020409: No Evidence for an Optical Afterglow
  62. GRB 020409, 2nd epoch optical observations
  63. GRB 020331 Kyoto observation on March 31
  64. GRB 020409, No Optical Detection to R = 20
  65. GRB 020409: Optical observations
  66. GRB 020410, optical observations
  67. GRB 020409, optical observations
  68. GRB 020409: Optical Observations
  69. GRB020406(?), optical observations
  70. X-ray afterglow of GRB020321
  71. GRB020331: Confirmation of Afterglow Candidate with Magellan
  72. GRB020405: VLT optical observations and V band decay slope
  73. GRB020331 optical observations with RIMOTS
  74. GRB020124 optical observations with RIBOTS/RIMOTS
  75. GRB 020321: Candidate X-ray Counterparts
  76. ASM GRB candidate 020406 refined error box
  77. GRB 020405: Moderate-resolution spectroscopy
  78. GRB020331: Optical Observations of Afterglow Candidate
  79. GRB020406(?), optical observations
  80. GRB020405: VLT optical observations
  81. Revised Photometry of the Optical Afterglow of GRB 020405
  82. GRB020405: OT observations
  83. GRB 020331: Candidate Optical Afterglow
  84. GRB 020405: Decay index
  85. GRB020405, Radio Observations
  86. GRB020405: VLT spectroscopy
  87. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  88. V band observations of GRB020405
  89. GRB 020405, U-band observations
  90. IPN localization of GRB020405
  91. GRB011212: Optical Observations
  92. GRB 020331: NIR Observations
  93. GRB 020331: NIR Observations
  94. GRB020331 field photometry
  95. GRB 020331, NIR observations
  96. GRB 020331: Optical observations
  97. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  98. GRB 020321: Infrared observations
  99. GRB 020322: BeppoSAX observations of the X-ray afterglow
  100. SN 2002ap - peak brightness date (SN/GRB?)

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