ASTROSAT CZTI

Data Quality Report

Orbit 17840

Creation date: 2024-06-27T17:42:03.508283
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/AS1T03_061T01_9000002654_17840cztM0_level2.evt modeM0/AS1T03_061T01_9000002654_17840cztM0_level2_quad_clean.evt
Size (bytes)1,017,685,440168,448,320
Size970.5 MB 160.6 MB
Events in quadrant A6,418,3021,062,160
Events in quadrant B7,072,8931,062,243
Events in quadrant C6,603,8371,033,931
Events in quadrant D9,792,241990,571

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02840
B02840
C02840
D02840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0284013
B0300543
C0285073
D0388683

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A137833182.307190%
B137835594.055721%
C137833802.757020%
D1378312358.960313%

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 15123 13784 2 2 0.01% 0.01%
B 15123 13784 131 131 0.87% 0.95%
C 15123 13784 0 0 0.00% 0.00%
D 15123 13784 697 697 4.61% 5.06%

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 15 174 22180 60.79 1665 1627 338.1
A 0 226 14331 37.58 1665 1627 338.1
A 3 137 13230 34.32 1665 1627 338.1
B 15 222 469337 1466.74 1650 1608 318.9
B 15 33 98496 303.83 1650 1608 318.9
B 12 111 39667 119.35 1650 1608 318.9
C 14 238 245377 640.99 1606 1617 380.3
C 13 62 42414 107.28 1606 1617 380.3
C 5 218 24861 61.12 1606 1617 380.3
D 7 238 3652111 9469.73 1581 1533 385.5
D 10 70 69295 175.78 1581 1533 385.5
D 2 234 59101 149.33 1581 1533 385.5

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