ASTROSAT CZTI

Data Quality Report

Orbit 55157

Creation date: 2025-12-08T11:27:04.496184
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_022T16_9000006532_55157cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55157cztM0_level2_quad_clean.evt
Size (bytes)462,816,000103,714,560
Size441.4 MB 98.9 MB
Events in quadrant A4,432,026677,981
Events in quadrant B3,447,282730,193
Events in quadrant C4,346,025639,771
Events in quadrant D4,355,051597,942

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0184872
B0157482
C0179932
D0181162

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70951812.551092%
B70952022.847075%
C70962433.424464%
D70961982.790304%

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 9240 7095 103 103 1.11% 1.45%
B 9240 7096 62 62 0.67% 0.87%
C 9241 7098 184 184 1.99% 2.59%
D 9241 7098 184 184 1.99% 2.59%

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 78 765896 4011.61 759 741 190.7
A 12 115 612618 3208.0 759 741 190.7
A 0 8 82356 427.9 759 741 190.7
B 2 249 249040 1513.88 756 728 164.0
B 4 81 113040 684.73 756 728 164.0
B 0 182 56106 337.62 756 728 164.0
C 13 3 735630 3652.34 735 729 201.2
C 10 22 269187 1334.19 735 729 201.2
C 1 16 177384 877.95 735 729 201.2
D 11 129 341348 1658.82 724 690 205.4
D 3 12 335269 1629.22 724 690 205.4
D 11 224 236971 1150.56 724 690 205.4

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