ASTROSAT CZTI

Data Quality Report

Orbit 55616

Creation date: 2026-01-08T12:12:02.388788
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_021T06_9000006538_55616cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55616cztM0_level2_quad_clean.evt
Size (bytes)573,168,96099,308,160
Size546.6 MB 94.7 MB
Events in quadrant A9,517,456503,203
Events in quadrant B3,144,956732,189
Events in quadrant C3,628,621650,696
Events in quadrant D4,354,173608,592

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0333752
B0150692
C0164832
D0181542

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7355217329.544528%
B7356510.693312%
C7356901.223491%
D73561632.215878%

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 8980 7357 1937 1937 21.57% 26.33%
B 8981 7358 4 4 0.04% 0.05%
C 8981 7358 59 59 0.66% 0.80%
D 8981 7358 199 199 2.22% 2.70%

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 15 32 6616892 40312.83 659 640 164.1
A 8 249 91527 553.77 659 640 164.1
A 0 8 60926 367.32 659 640 164.1
B 10 247 47518 286.12 759 731 163.5
B 7 0 30166 180.01 759 731 163.5
B 5 185 21960 129.82 759 731 163.5
C 9 38 218728 1061.24 748 739 205.4
C 12 2 201700 978.34 748 739 205.4
C 6 9 66173 318.55 748 739 205.4
D 8 245 835874 4030.15 739 706 207.2
D 11 129 265713 1278.81 739 706 207.2
D 7 70 108785 521.54 739 706 207.2

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