ASTROSAT CZTI

Data Quality Report

Orbit 20200513_A07_027T16_9000003666_level2

Creation date: 2025-12-11T02:02:21.209046
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/AS1A07_027T16_9000003666cztM0_level2.fits modeM0/AS1A07_027T16_9000003666cztM0_level2_quad_clean.evt
Size (bytes)540,927,360461,033,280
Size515.9 MB 439.7 MB
Events in quadrant A3,374,9822,779,250
Events in quadrant B3,239,8982,799,948
Events in quadrant C3,043,9902,133,067
Events in quadrant D2,880,5162,411,774

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011360
B011360
C011360
D011360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0760
B0760
C0760
D0760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01150820
B01177770
C02218020
D01397060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A559216401.144472%
B559219051.618354%
C559211273022.764257%
D5592121853.907298%

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 63496 55920 0 0 0.00% 0.00%
B 63496 55920 0 0 0.00% 0.00%
C 63495 55918 0 0 0.00% 0.00%
D 63496 55642 0 0 0.00% 0.00%

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 29 3261 11.33 878 827 214.9
A 7 110 2763 9.01 878 827 214.9
A 0 30 2620 8.35 878 827 214.9
B 2 9 2602 10.67 856 818 167.2
B 2 8 2270 8.68 856 818 167.2
B 3 80 2205 8.29 856 818 167.2
C 1 80 2364 7.85 803 753 205.2
C 1 81 2343 7.75 803 753 205.2
C 12 241 2184 6.97 803 753 205.2
D 15 46 2095 6.2 820 747 217.4
D 3 14 2073 6.1 820 747 217.4
D 6 231 2031 5.9 820 747 217.4

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