ASTROSAT CZTI

Data Quality Report

Orbit 51759

Creation date: 2025-04-23T17:16:34.449281
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/AS1A13_090T01_9000006464_51759cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51759cztM0_level2_quad_clean.evt
Size (bytes)831,778,56088,848,000
Size793.2 MB 84.7 MB
Events in quadrant A4,771,164666,065
Events in quadrant B5,292,304700,236
Events in quadrant C5,334,818614,934
Events in quadrant D14,824,101199,746

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0191041
B0207001
C0209801
D0491227

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A73122964.048140%
B73136468.833584%
C731381511.144537%
D7312522071.389497%

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 7907 7313 26 26 0.33% 0.36%
B 7908 7314 266 266 3.36% 3.64%
C 7908 7313 443 443 5.60% 6.06%
D 7907 7311 4072 4072 51.50% 55.70%

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 3 14 1104841 5720.4 801 784 193.0
A 4 3 82261 422.15 801 784 193.0
A 5 240 58219 297.59 801 784 193.0
B 4 206 1124367 6600.77 787 757 170.2
B 1 223 282316 1654.05 787 757 170.2
B 7 252 126674 739.71 787 757 170.2
C 15 230 1739060 8496.62 754 749 204.6
C 13 3 109648 532.28 754 749 204.6
C 15 189 78751 381.26 754 749 204.6
D 11 129 12295115 100297.21 438 420 122.6
D 8 176 608210 4958.21 438 420 122.6
D 12 32 50374 407.51 438 420 122.6

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