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"

45533 results found.

  1. GRB 020410: Discovery of Probable OT by HST
  2. GRB 020124, HST observations of the fading afterglow
  3. IPN triangulation of GRB020708
  4. IPN triangulation of GRB020708
  5. IPN error box for GRB020706
  6. Correction to IPN error box for GRB020706
  7. IPN triangulation of GRB020706
  8. GRB 020705: Optical observations
  9. GRB 020625, optical observations
  10. GRB 020625: Optical observations
  11. GRB 020531: optical photometry of Chandra sources
  12. GRB020625 (=H2081): A Long Burst Localized by HETE
  13. HETE #2081: Optical observations
  14. The Probable Host Galaxy of GRB/XRF 020427
  15. GRB/XRF 020427, detection of an underlying system with the VLT
  16. Gemini IR Detection of AXP 1E 2259+586 Post-Burst
  17. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  18. AXP 1E2259+586: quasi-simultaneous optical observation
  19. AXP 1E2259+586 optical observations
  20. Fading Optical Source in the Field of GRB020531
  21. GRB 020531, INT+WFC deep optical upper limits
  22. SGR-like Bursts from the AXP 1E 2259+586
  23. GRB020405: polarimetric observations
  24. GRB 020531, simultaneous optical observations
  25. GRB 020604, optical observations
  26. GRB 020531/Candidate Redshift
  27. GRB020531: Detection of Candidate Host Galaxy
  28. GRB020531: Second epoch Chandra observations
  29. GRB020604, optical observations
  30. GRB020604, BVRcIc field photometry
  31. GRB020603, BVRcIc field observations
  32. GRB020531, BVRcIc field photometry
  33. GRB020531 Optical observations with TAROT
  34. GRB020531 Optical observations with TAROT
  35. GRB 020418, optical/near-IR observations
  36. GRB 020531, Radio Observations
  37. IPN triangulation of GRB020604
  38. GRB020531 Optical Observations
  39. GRB020531: Observations with the Chandra X-ray Observatory
  40. GRB 020603: Optical Observations
  41. GRB 020603, R-band observation
  42. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  43. GRB020531: Upper Limit for Detection of Two TAROT Sources
  44. GRB 020603: Optical observations
  45. IPN triangulation of GRB020603 (possible short/hard GRB)
  46. GRB 020531 optical observations with TAROT
  47. Refined IPN error box for GRB020531
  48. GRB020531, optical observations
  49. GRB020531: optical observations
  50. GRB020531, optical observation
  51. GRB020531(=H2042): Optical Observations
  52. IPN triangulation of the short, hard GRB020531 (=H2042)
  53. GRB020531(=H2042): Optical Observations
  54. GRB020531: Optical observations
  55. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  56. GRB 020525: Optical Observations
  57. GRB020525, optical observations
  58. IPN detection of possible bursts from SGR1806-20
  59. IPN triangulation of GRB020525
  60. XRF 020427: Sudden Ionospheric Disturbance (SID)
  61. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  62. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  63. IPN triangulation of a burst from SGR1806-20
  64. GRB/XRF 020427, Radio Observations
  65. HST detection of the likely host galaxy of GRB 020124
  66. GRB020405 field photometry at ESO
  67. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  68. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  69. GRB020321 : Optical observations.
  70. GRB020427 BeppoSAX NFI Observation
  71. XRF 020427
  72. GRB020331: Third Epoch and Revised Second Epoch Optical
  73. The end of BSAX GRB activities
  74. GRB 020410, Radio Observations
  75. GRB 020418: Optical observations
  76. GRB 020124: Optical observations
  77. GRB 020418: Optical observations
  78. IPN triangulation of GRB020418
  79. GRB020405: VLT observations of the OT environment
  80. GRB020410: BeppoSAX NFI observations refined analysis
  81. GRB 020409: Optical Observations
  82. Mars Odyssey joins the IPN
  83. IPN triangulation of GRB020413
  84. GRB 020409, 2-nd epoch optical observations at Terskol.
  85. GRB020405: predicted break
  86. GRB 020409: Optical observations
  87. GRB 020409, No Optical Detection to R = 22
  88. GRB020410: second BeppoSAX NFI observation
  89. GRB 020409: No Evidence for an Optical Afterglow
  90. GRB 020409, 2nd epoch optical observations
  91. GRB 020331 Kyoto observation on March 31
  92. GRB 020409
  93. GRB 020409 SARA Observations
  94. GRB "020411"
  95. GRB 020409, No Optical Detection to R = 20
  96. GRB020410: BeppoSAX NFI observation
  97. GRB 020409: Optical observations
  98. April 11 BeppoSAX event (GRB020411) is likely not a GRB
  99. GRB 020410, optical observations
  100. BeppoSAX ALERT: possible GRB020411

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