ASTROSAT CZTI

Data Quality Report

Orbit 35075

Creation date: 2022-03-25T01:55:26.189486
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_015T01_9000005026_35075cztM0_level2.evt modeM0/AS1T05_015T01_9000005026_35075cztM0_level2_quad_clean.evt
Size (bytes)464,673,60086,564,160
Size443.1 MB 82.6 MB
Events in quadrant A2,533,802576,977
Events in quadrant B3,120,360582,716
Events in quadrant C2,819,913586,441
Events in quadrant D5,265,984531,278

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01000
B01000
C01000
D01000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380
B0380
C0380
D0390

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0105443
B0122922
C0112512
D0191352

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4904130.265090%
B49041102.243067%
C4904681.386623%
D490456411.500816%

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 7058 4905 8 8 0.11% 0.16%
B 7058 4905 72 72 1.02% 1.47%
C 7058 4905 35 35 0.50% 0.71%
D 7058 4905 440 440 6.23% 8.97%

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 83 79569 640.73 618 607 123.2
A 15 174 38960 311.21 618 607 123.2
A 13 6 12645 97.68 618 607 123.2
B 5 172 431797 3720.26 614 599 115.9
B 0 189 138125 1186.54 614 599 115.9
B 4 232 55807 476.32 614 599 115.9
C 15 214 205698 1450.87 611 616 141.4
C 0 10 164320 1158.13 611 616 141.4
C 14 67 65441 458.61 611 616 141.4
D 8 195 1908640 13611.93 580 566 140.2
D 10 118 784075 5589.44 580 566 140.2
D 13 249 164217 1167.46 580 566 140.2

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