ASTROSAT CZTI

Data Quality Report

Orbit 55516

Creation date: 2026-01-21T16:25:40.282188
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_099T01_9000006536_55516cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55516cztM0_level2_quad_clean.evt
Size (bytes)543,317,76090,169,920
Size518.1 MB 86.0 MB
Events in quadrant A2,929,932625,485
Events in quadrant B9,411,363492,519
Events in quadrant C3,299,179592,920
Events in quadrant D3,951,942553,211

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0138492
B0325932
C0148532
D0165562

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6684590.882705%
B6684201930.206463%
C66841261.885099%
D66842343.500898%

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 7694 6685 11 11 0.14% 0.16%
B 7694 6685 1609 1609 20.91% 24.07%
C 7694 6685 79 79 1.03% 1.18%
D 7694 6685 179 179 2.33% 2.68%

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 8 106821 604.54 706 687 175.6
A 4 159 37453 209.42 706 687 175.6
A 13 254 12580 67.74 706 687 175.6
B 5 172 6997790 55326.61 589 567 126.5
B 10 247 32337 251.2 589 567 126.5
B 12 111 15502 118.09 589 567 126.5
C 15 147 268098 1425.1 681 675 187.7
C 9 38 91447 483.73 681 675 187.7
C 15 178 89864 475.29 681 675 187.7
D 2 153 434123 2299.82 670 640 188.5
D 11 129 296822 1571.38 670 640 188.5
D 10 181 271734 1438.27 670 640 188.5

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