ASTROSAT CZTI

Data Quality Report

Orbit 51439

Creation date: 2025-04-02T12:05:17.254917
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/AS1A13_090T01_9000006458_51439cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51439cztM0_level2_quad_clean.evt
Size (bytes)741,458,88087,042,240
Size707.1 MB 83.0 MB
Events in quadrant A8,470,389519,611
Events in quadrant B4,155,986677,380
Events in quadrant C9,497,249418,861
Events in quadrant D4,810,713558,602

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0297862
B0168632
C0327523
D0190513

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6617148522.442194%
B66182834.276216%
C6617243536.799154%
D66162904.383313%

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 7558 6619 1247 1247 16.50% 18.84%
B 7558 6619 163 163 2.16% 2.46%
C 7557 6617 2184 2184 28.90% 33.01%
D 7557 6618 245 245 3.24% 3.70%

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 12 3 1993999 12365.82 651 637 161.2
A 7 64 1751825 10863.49 651 637 161.2
A 15 174 929198 5760.33 651 637 161.2
B 5 172 306385 2024.11 709 684 151.0
B 0 172 215029 1419.22 709 684 151.0
B 4 206 150851 994.29 709 684 151.0
C 0 176 3585999 22546.57 574 569 159.0
C 4 12 1249342 7852.77 574 569 159.0
C 15 179 1109752 6974.97 574 569 159.0
D 8 176 974117 5176.62 677 652 188.1
D 13 170 351358 1864.96 677 652 188.1
D 6 42 191549 1015.14 677 652 188.1

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