ASTROSAT CZTI

Data Quality Report

Orbit 58495

Creation date: 2026-07-21T00:17:55.067001
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_044T04_9000006592_58495cztM0_level2.fits modeM0/AS1A14_044T04_9000006592_58495cztM0_level2_quad_clean.evt
Size (bytes)490,167,36096,543,360
Size467.5 MB 92.1 MB
Events in quadrant A3,331,627645,886
Events in quadrant B5,028,751651,086
Events in quadrant C4,803,783593,074
Events in quadrant D4,462,620568,470

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0147012
B0196082
C0190813
D0177832

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66611051.576340%
B66625498.240769%
C66614316.470500%
D66612934.398739%

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 7661 6662 56 56 0.73% 0.84%
B 7662 6663 360 360 4.70% 5.40%
C 7661 6662 360 360 4.70% 5.40%
D 7661 6662 211 211 2.75% 3.17%

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 10 17 201155 1091.66 737 717 183.6
A 10 143 89931 485.89 737 717 183.6
A 12 114 42158 225.7 737 717 183.6
B 5 172 1049823 6851.34 715 691 153.1
B 5 185 646590 4218.03 715 691 153.1
B 2 249 112461 729.91 715 691 153.1
C 13 3 1311390 6729.18 705 699 194.8
C 15 223 272214 1393.98 705 699 194.8
C 12 249 120041 612.71 705 699 194.8
D 3 12 1141253 5665.59 706 675 201.3
D 8 240 164381 813.18 706 675 201.3
D 2 249 97874 482.82 706 675 201.3

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