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"

36012 results found.

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