ASTROSAT CZTI

Data Quality Report

Orbit 40121

Creation date: 2024-06-27T22:12:34.458953
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/AS1A12_004T01_9000005520_40121cztM0_level2.fits modeM0/AS1A12_004T01_9000005520_40121cztM0_level2_quad_clean.evt
Size (bytes)924,626,880232,945,920
Size881.8 MB 222.2 MB
Events in quadrant A7,445,9191,562,615
Events in quadrant B6,903,2001,601,918
Events in quadrant C10,015,3431,485,008
Events in quadrant D8,726,6221,391,728

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0309153
B0307143
C0391113
D0360223

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0430
B0420
C0420
D0430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02980
B02980
C02980
D02980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14659520.354731%
B14659890.607136%
C146596234.249949%
D146593432.339859%

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 17346 14661 38 38 0.22% 0.26%
B 17346 14661 62 62 0.36% 0.42%
C 17346 14661 625 625 3.60% 4.26%
D 17346 14661 275 275 1.59% 1.88%

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 10 83 1059799 3286.59 1583 1548 322.0
A 13 248 70360 213.71 1583 1548 322.0
A 15 223 69068 209.7 1583 1548 322.0
B 5 255 350134 1139.78 1580 1535 305.8
B 0 190 137325 443.98 1580 1535 305.8
B 4 171 51209 162.41 1580 1535 305.8
C 9 187 3087099 8599.77 1534 1542 358.8
C 15 214 587546 1633.26 1534 1542 358.8
C 10 20 157022 433.34 1534 1542 358.8
D 13 249 710833 1889.95 1532 1490 375.3
D 2 249 631392 1678.29 1532 1490 375.3
D 12 227 532305 1414.28 1532 1490 375.3

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