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.

"N/A_MC170720_R1" does not adhere to advanced search syntax. Please refer to the documentation and try again.
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"

10955 results found.

  1. GRB030323: Upper limits from recent and historical observations.
  2. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  3. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  4. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  5. GRB 030324, optical observations
  6. IPN triangulation of GRB030320B (annulus)
  7. GRB030226, addendum to GCN 1892
  8. IPN upper limit to a GRB associated with SN2003L
  9. IPN triangulation of GRB030317 (annulus)
  10. IPN triangulation of GRB030307 (annulus)
  11. GRB030226: Optical observations at Asiago
  12. GRB 030227: Optical observations
  13. IPN triangulation of GRB030301 (annulus)
  14. 030302: NOT A GRB
  15. 030228: NOT A GRB
  16. GRB 030226: R band polarimetric observations
  17. GRB 20030226: Upper limits from recent and historical observations
  18. GRB030227 - faint tentative OT candidate
  19. XMM-Newton observation of GRB030227
  20. GRB030226: ESI spectroscopy
  21. GRB030226 (=U10893): A Long GRB Localized by the HETE WXM and SXC
  22. GRB030226: optical observations and refined redshift
  23. GRB 030226 Optical Spectra and R,I,z' Imaging
  24. GRB030226: Candidate optical afterglow
  25. IPN triangulation of GRB030220 (annulus)
  26. IPN triangulation of GRB030217 (small error box)
  27. IPN triangulation of GRB030215C (annulus)
  28. IPN triangulation of GRB030217 (annulus)
  29. IPN triangulation of GRB030215A and GRB030215B (annuli)
  30. IPN triangulation of GRB030204 (small error box)
  31. IPN triangulation of GRB030127 (annulus)
  32. GRB 030115: Further IR observations with IRSF/SIRIUS
  33. GRB 030115: IR observations with IRSF/SIRIUS
  34. GRB030115: R-band counterpart of IR candidate
  35. GRB 021211: R-band observations at late-time
  36. IPN triangulation of GRB030115B (small error box)
  37. GRB030115 (=H2533): A Long GRB Localized by the HETE WXM and SXC
  38. IPN triangulation of GRB030115B (annulus)
  39. GRB030115: R-band observations at Asiago
  40. IPN triangulation of GRB030101 (two large error boxes)
  41. Probable GRB in INTEGRAL SPI-ACS
  42. GRB021219, optical observations
  43. IPN triangulation of GRB021214 (annulus)
  44. GRB 021211, optical observations
  45. GRB 021211, optical observations
  46. GRB021211 - Upper limits from recent and historical observations
  47. GRB021211 (=H2493): A Bright, Long GRB Localized by HETE-2 in Near-Real Time
  48. HETE 2493: Optical observations
  49. IPN triangulation of GRB021201 (short/hard burst, small error box)
  50. GRB021125 refined position
  51. IPN triangulation of GRB021125B (two large error boxes)
  52. GRB021113, SPI ACS observation
  53. GRB021113: optical observations at Bisei
  54. GRB021112: Optical Observations
  55. IPN triangulation of GRB021113 (=H2449; annulus)
  56. GRB021113 (=H2449): A Long GRB Localized by HETE
  57. GRB021112 (=H2448): A Long GRB Localized by HETE
  58. IPN triangulation of GRB021104 (annulus)
  59. GRB021104(=H2434): A Long, X-Ray-Rich GRB Localized by HETE
  60. IPN triangulation of bursts from SGR1900+14, November 1-2, 2002
  61. GRB021104: Candidate present in DSS
  62. IPN triangulation of GRB021025 (portion of annulus)
  63. IPN triangulation of GRB021025 (annulus)
  64. IPN triangulation of GRB021023 (small error boc)
  65. IPN triangulation of GRB021020 (smaller error box)
  66. GRB021021(=XRF 021021): An X-ray Flash Localized by HETE
  67. IPN triangulation of GRB021020
  68. GRB 021004: VRI observations at TNG: possible break
  69. GRB021016(=H2397): A Long GRB Localized by HETE
  70. IPN triangulation of GRB021016 (small error box)
  71. IPN triangulation of GRB021014 (large error box)
  72. GRB021004: High-resolution optical spectroscopy
  73. GRB 021004: Optical/NIR Observations
  74. GRB 021004: Additional V-band Polarimetric Observations
  75. GRB021004: optical observation
  76. GRB 021004: WC wind?
  77. IPN triangulation of GRB021007 (annulus)
  78. XRF 020903 spectrum
  79. GRB021004: optical observations and predicted break time
  80. GRB021004: restart of optical decay
  81. GRB 021004: Optical Decay
  82. HETE fluences for GRB021004
  83. GRB 021004: V-band Polarimetric Observations
  84. GRB021004: Update Bisei photometric data
  85. GRB 021004: Optical Decay
  86. GRB021004, Optical Observations
  87. GRB021004: Upper limits from recent and historical observations
  88. GRB021004(=H2380): Revised Localization with HETE Soft X-ray
  89. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  90. XRF020903: TNG and Asiago photometry
  91. XRF 020903: Correction to GCN 1560
  92. XRF 020903: VRI observations
  93. XRF 020903: Supernova
  94. Single IPN error box for GRB020904
  95. IPN triangulation of GRB020904
  96. GRB020903(=H2314): An X-Ray Flash Localized by HETE
  97. GRB020819(=H2275): Revised Localization with HETE Soft X-ray
  98. SGR1900+14 burst localized by HETE
  99. GRB020813: High-resolution optical spectroscopy
  100. Second epoch K band imaging of GRB 020819

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