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"

37813 results found.

  1. Refined IPN error box for GRB020531
  2. GRB020531, optical observations
  3. GRB020531(=H2042): Optical Observations
  4. IPN triangulation of the short, hard GRB020531 (=H2042)
  5. GRB020531(=H2042): Optical Observations
  6. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  7. GRB 020525: Optical Observations
  8. GRB020525, optical observations
  9. IPN detection of possible bursts from SGR1806-20
  10. IPN triangulation of GRB020525
  11. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  12. IPN triangulation of a burst from SGR1806-20
  13. GRB/XRF 020427, Radio Observations
  14. HST detection of the likely host galaxy of GRB 020124
  15. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  16. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  17. GRB020321 : Optical observations.
  18. GRB020427 BeppoSAX NFI Observation
  19. XRF 020427
  20. GRB020331: Third Epoch and Revised Second Epoch Optical
  21. The end of BSAX GRB activities
  22. GRB 020410, Radio Observations
  23. GRB 020418: Optical observations
  24. GRB 020124: Optical observations
  25. GRB 020418: Optical observations
  26. IPN triangulation of GRB020418
  27. GRB020405: VLT observations of the OT environment
  28. GRB020410: BeppoSAX NFI observations refined analysis
  29. GRB 020409: Optical Observations
  30. Mars Odyssey joins the IPN
  31. IPN triangulation of GRB020413
  32. GRB 020409, 2-nd epoch optical observations at Terskol.
  33. GRB 020409: Optical observations
  34. GRB 020409, No Optical Detection to R = 22
  35. GRB 020409: No Evidence for an Optical Afterglow
  36. GRB 020409, 2nd epoch optical observations
  37. GRB 020331 Kyoto observation on March 31
  38. GRB 020409
  39. GRB 020409 SARA Observations
  40. GRB "020411"
  41. GRB 020409, No Optical Detection to R = 20
  42. GRB020410: BeppoSAX NFI observation
  43. GRB 020409: Optical observations
  44. April 11 BeppoSAX event (GRB020411) is likely not a GRB
  45. GRB 020410, optical observations
  46. BeppoSAX ALERT: possible GRB020411
  47. GRB 020409, optical observations
  48. GRB 020409: Optical Observations
  49. GRB020406(?), optical observations
  50. GRB020410, optical observations
  51. BeppoSAX ALERT: possible GRB020410
  52. X-ray afterglow of GRB020321
  53. BeppoSAX GRB : GRB020409
  54. GRB020405: VLT optical observations and V band decay slope
  55. GRB020331 optical observations with RIMOTS
  56. GRB020124 optical observations with RIBOTS/RIMOTS
  57. GRB 020321: Candidate X-ray Counterparts
  58. ASM GRB candidate 020406 refined error box
  59. GRB 020405: Moderate-resolution spectroscopy
  60. GRB020406(?), optical observations
  61. GRB020405: VLT optical observations
  62. Revised Photometry of the Optical Afterglow of GRB 020405
  63. GRB020405: OT observations
  64. GRB 020331: Candidate Optical Afterglow
  65. GRB 020405: Decay index
  66. Short RXTE/ASM transient 020406; may be a GRB
  67. GRB020405, Radio Observations
  68. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  69. GRB 020405, U-band observations
  70. GRB 020405: Optical afterglow candidate
  71. IPN localization of GRB020405
  72. GRB011212: Optical Observations
  73. GRB 020331: NIR Observations
  74. GRB 020331: NIR Observations
  75. GRB020331 NIR observation at KPNO (re-submission)
  76. GRB02033 NIR observation at KPNO
  77. GRB020331 field photometry
  78. GRB 020331 Optical Observations
  79. GRB 020331, NIR observations
  80. GRB 020331: Optical observations
  81. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  82. GRB 020321: Infrared observations
  83. GRB 020322: BeppoSAX observations of the X-ray afterglow
  84. SN 2002ap - peak brightness date (SN/GRB?)
  85. GRB 020322, Radio observations
  86. Near-Infrared Observations of GRB020322 at TIRGO
  87. GRB 020321, Radio Observations
  88. GRB 020322: Optical Observations
  89. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  90. GRB 020321: Optical observations
  91. GRB020317 BVRI field photometry
  92. GRB011211 revised BVRI field photometry
  93. GRB020305 BVRI field photometry
  94. GRB020322 BVRI field photometry
  95. GRB 020322 optical observations
  96. GRB 020322 optical observation
  97. GRB020317 : Near IR Observations from Mt Abu Observatory
  98. GRB 020322: Optical Sources and Improved Astrometry
  99. GRB020322, optical observations
  100. GRB 020322: Optical candidate

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