ASTROSAT CZTI

Data Quality Report

Orbit 55862

Creation date: 2026-01-24T23:39:04.660509
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_030T02_9000006544_55862cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55862cztM0_level2_quad_clean.evt
Size (bytes)1,306,460,160243,319,680
Size1.2 GB 232.0 MB
Events in quadrant A11,614,0871,604,284
Events in quadrant B10,659,5441,624,281
Events in quadrant C14,429,1441,391,533
Events in quadrant D10,224,4081,472,286

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0466533
B0455043
C0567304
D0443243

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A185009355.054054%
B1850012876.956757%
C18500258813.989189%
D185007464.032432%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 19675 18503 374 374 1.90% 2.02%
B 19675 18503 814 814 4.14% 4.40%
C 19675 18503 1882 1882 9.57% 10.17%
D 19675 18503 384 384 1.95% 2.08%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 12 115 1640031 3496.08 1901 1853 468.6
A 3 14 1070454 2280.53 1901 1853 468.6
A 7 64 683795 1455.35 1901 1853 468.6
B 5 236 2144022 5343.5 1865 1795 400.9
B 0 171 155924 384.45 1865 1795 400.9
B 5 32 145493 358.43 1865 1795 400.9
C 15 199 4558024 9539.24 1742 1727 477.6
C 12 254 828825 1731.65 1742 1727 477.6
C 13 3 624569 1304.01 1742 1727 477.6
D 11 129 1349806 2587.78 1866 1785 520.9
D 3 12 542960 1038.89 1866 1785 520.9
D 2 249 351968 672.24 1866 1785 520.9

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter