ASTROSAT CZTI

Data Quality Report

Orbit 54271

Creation date: 2025-10-09T19:36:40.306850
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_126T15_9000006516_54271cztM0_level2.fits modeM0/AS1A14_126T15_9000006516_54271cztM0_level2_quad_clean.evt
Size (bytes)496,434,24082,255,680
Size473.4 MB 78.4 MB
Events in quadrant A2,645,659586,440
Events in quadrant B3,508,919612,932
Events in quadrant C3,398,931537,240
Events in quadrant D8,354,616333,997

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0123881
B0145971
C0145671
D0290811

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6014611.014300%
B60151973.275145%
C60151662.759767%
D6015225737.522860%

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 6979 6014 8 8 0.11% 0.13%
B 6980 6016 129 129 1.85% 2.14%
C 6980 6016 137 137 1.96% 2.28%
D 6980 6015 2114 2114 30.29% 35.15%

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 15 174 49755 314.52 633 616 156.2
A 11 3 32567 204.51 633 616 156.2
A 4 3 24288 151.52 633 616 156.2
B 0 213 361446 2751.93 614 594 131.1
B 7 0 227206 1728.19 614 594 131.1
B 5 185 146098 1109.64 614 594 131.1
C 1 29 580954 3544.15 599 593 163.8
C 4 5 200262 1219.34 599 593 163.8
C 12 2 76870 465.81 599 593 163.8
D 8 176 5573722 42102.46 460 439 132.4
D 6 239 245975 1854.86 460 439 132.4
D 12 2 164689 1240.8 460 439 132.4

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