ASTROSAT CZTI

Data Quality Report

Orbit 54584

Creation date: 2025-10-31T10:37:53.459569
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_127T09_9000006520_54584cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54584cztM0_level2_quad_clean.evt
Size (bytes)726,837,12090,760,320
Size693.2 MB 86.6 MB
Events in quadrant A8,523,028572,095
Events in quadrant B3,744,841691,586
Events in quadrant C3,273,368617,882
Events in quadrant D10,831,572387,195

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300821
B0158561
C0147571
D0369401

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6870142920.800582%
B68711672.430505%
C68711141.659147%
D6871254937.097948%

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 7695 6871 1200 1200 15.59% 17.46%
B 7696 6872 61 61 0.79% 0.89%
C 7696 6872 34 34 0.44% 0.49%
D 7696 6871 2474 2474 32.15% 36.01%

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 4728399 26393.87 722 703 179.1
A 11 3 504233 2811.12 722 703 179.1
A 14 235 250512 1394.64 722 703 179.1
B 8 234 317261 1964.44 747 722 161.1
B 10 14 189629 1172.35 747 722 161.1
B 2 249 54135 331.48 747 722 161.1
C 4 5 127612 631.57 737 731 200.9
C 12 250 57198 281.07 737 731 200.9
C 13 3 39754 194.24 737 731 200.9
D 7 70 6835611 40955.04 583 555 166.9
D 15 94 495674 2966.71 583 555 166.9
D 3 12 213995 1278.91 583 555 166.9

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