ASTROSAT CZTI

Data Quality Report

Orbit 55807

Creation date: 2026-01-21T04:35:52.358176
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_127T10_9000006542_55807cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55807cztM0_level2_quad_clean.evt
Size (bytes)497,704,32092,949,120
Size474.6 MB 88.6 MB
Events in quadrant A7,358,639532,077
Events in quadrant B2,789,060666,855
Events in quadrant C3,405,454591,811
Events in quadrant D4,363,759568,620

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0263171
B0136681
C0154631
D0176651

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6519111917.165209%
B6519510.782329%
C65192093.206013%
D65201612.469325%

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 7569 6520 1148 1148 15.17% 17.61%
B 7569 6520 11 11 0.15% 0.17%
C 7569 6520 154 154 2.03% 2.36%
D 7570 6521 201 201 2.66% 3.08%

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 12 115 2377200 15419.86 609 596 154.1
A 15 32 1671608 10841.84 609 596 154.1
A 3 14 310242 2009.04 609 596 154.1
B 0 213 58764 410.84 647 623 141.5
B 10 247 46448 323.81 647 623 141.5
B 5 172 36770 255.42 647 623 141.5
C 13 3 796523 4473.29 634 630 177.9
C 9 38 44747 247.96 634 630 177.9
C 6 223 29617 162.92 634 630 177.9
D 7 70 1259569 6807.96 638 608 184.9
D 11 129 158156 851.96 638 608 184.9
D 3 12 138291 744.53 638 608 184.9

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