ASTROSAT CZTI

Data Quality Report

Orbit 50494

Creation date: 2025-01-28T12:00:04.462281
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/AS1T05_239T01_9000006444_50494cztM0_level2.fits modeM0/AS1T05_239T01_9000006444_50494cztM0_level2_quad_clean.evt
Size (bytes)519,183,36082,261,440
Size495.1 MB 78.5 MB
Events in quadrant A3,774,717539,315
Events in quadrant B3,453,565607,725
Events in quadrant C5,947,119485,294
Events in quadrant D5,586,843447,802

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0152241
B0142911
C0216241
D0207873

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A58743806.469186%
B58752564.357447%
C587588415.046809%
D587488315.032346%

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 6939 5874 152 152 2.19% 2.59%
B 6940 5875 87 87 1.25% 1.48%
C 6940 5875 712 712 10.26% 12.12%
D 6938 5873 816 816 11.76% 13.89%

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 10 253 886592 5712.07 633 618 155.1
A 3 63 67513 431.28 633 618 155.1
A 4 249 65143 416.0 633 618 155.1
B 4 206 309186 2274.5 636 613 135.7
B 7 0 257663 1894.73 636 613 135.7
B 10 247 94167 689.59 636 613 135.7
C 15 235 1126427 7021.33 579 574 160.3
C 15 195 621054 3869.59 579 574 160.3
C 0 177 327593 2039.44 579 574 160.3
D 7 61 1903388 12149.58 561 541 156.6
D 6 42 286105 1823.31 561 541 156.6
D 11 161 218270 1390.19 561 541 156.6

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