ASTROSAT CZTI

Data Quality Report

Orbit 55545

Creation date: 2026-01-03T13:26:18.661043
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_55545cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55545cztM0_level2_quad_clean.evt
Size (bytes)688,345,92070,824,960
Size656.5 MB 67.5 MB
Events in quadrant A2,742,294565,986
Events in quadrant B2,648,136607,612
Events in quadrant C3,057,956539,447
Events in quadrant D16,554,4573,069

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0129781
B0127071
C0137981
D05324319

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6128881.436031%
B6128821.338120%
C6128901.468668%
D6127609699.494043%

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 7078 6128 28 28 0.40% 0.46%
B 7078 6128 18 18 0.25% 0.29%
C 7078 6128 51 51 0.72% 0.83%
D 7078 6126 6074 6074 85.82% 99.15%

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 0 8 132405 851.35 623 606 154.8
A 15 32 88833 569.9 623 606 154.8
A 4 3 48875 311.79 623 606 154.8
B 0 171 43611 324.83 618 596 132.4
B 10 247 36873 273.95 618 596 132.4
B 1 238 35042 260.12 618 596 132.4
C 9 38 221138 1322.7 602 594 166.7
C 13 3 192707 1152.19 602 594 166.7
C 15 178 77178 459.31 602 594 166.7
D 7 70 15417359 214339.88 249 237 71.9
D 2 172 37244 514.5 249 237 71.9
D 6 239 23777 327.27 249 237 71.9

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