ASTROSAT CZTI

Data Quality Report

Orbit 54874

Creation date: 2025-11-19T13:08:16.495851
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_039T06_9000006526_54874cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54874cztM0_level2_quad_clean.evt
Size (bytes)1,908,426,240363,021,120
Size1.8 GB 346.2 MB
Events in quadrant A13,282,1742,422,783
Events in quadrant B18,529,2252,405,532
Events in quadrant C14,409,7142,293,756
Events in quadrant D22,403,8582,073,629

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05912934
B07521519
C06218120
D08497549

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05240
B05240
C05240
D05240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A261114161.593198%
B26114276410.584361%
C261155912.263067%
D2610920537.863189%

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 27768 26120 211 211 0.76% 0.81%
B 27769 26119 1020 1020 3.67% 3.91%
C 27769 26124 486 486 1.75% 1.86%
D 27770 26120 2085 2085 7.51% 7.98%

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 1476801 2162.97 2789 2724 681.5
A 7 14 409661 597.11 2789 2724 681.5
A 0 8 347880 506.46 2789 2724 681.5
B 10 247 6091568 10577.77 2681 2576 575.6
B 5 185 1530366 2654.07 2681 2576 575.6
B 7 252 78890 132.57 2681 2576 575.6
C 12 249 954803 1299.59 2693 2671 732.6
C 14 254 748213 1017.61 2693 2671 732.6
C 12 252 637824 866.94 2693 2671 732.6
D 11 176 8603257 11654.59 2625 2517 738.0
D 6 239 1187288 1605.45 2625 2517 738.0
D 6 46 786201 1061.95 2625 2517 738.0

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