ASTROSAT CZTI

Data Quality Report

Orbit 03937

Creation date: 2024-06-27T14:35:27.861761
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/AS1G05_172T01_9000000502_03937cztM0_level2.evt modeM0/AS1G05_172T01_9000000502_03937cztM0_level2_quad_clean.evt
Size (bytes)498,985,92058,688,640
Size475.9 MB 56.0 MB
Events in quadrant A3,172,732334,064
Events in quadrant B4,849,959339,906
Events in quadrant C3,014,050336,965
Events in quadrant D3,638,778317,092

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0134580
B0183620
C0131150
D0151110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6426530.824774%
B64262584.014939%
C6426280.435730%
D64261161.805167%

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 7786 6427 19 19 0.24% 0.30%
B 7786 6427 103 103 1.32% 1.60%
C 7786 6427 2 2 0.03% 0.03%
D 7786 6427 86 86 1.10% 1.34%

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 0 118 114671 724.67 781 767 157.2
A 0 226 18359 111.92 781 767 157.2
A 8 15 13519 81.13 781 767 157.2
B 3 0 1571349 10528.18 790 773 149.2
B 15 204 129502 862.92 790 773 149.2
B 4 81 57897 382.92 790 773 149.2
C 1 16 16393 88.89 763 767 175.8
C 10 65 14132 76.03 763 767 175.8
C 13 61 6362 31.83 763 767 175.8
D 9 82 420628 2348.15 749 729 178.8
D 2 232 175872 979.43 749 729 178.8
D 13 223 96190 533.83 749 729 178.8

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