ASTROSAT CZTI

Data Quality Report

Orbit 51639

Creation date: 2025-04-15T16:23:00.505189
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_037T05_9000006460_51639cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51639cztM0_level2_quad_clean.evt
Size (bytes)1,299,093,120211,930,560
Size1.2 GB 202.1 MB
Events in quadrant A10,401,6371,406,080
Events in quadrant B15,239,3521,325,477
Events in quadrant C12,168,2871,331,444
Events in quadrant D9,102,9791,304,425

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320
B0320
C0320
D0320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0414033
B0556923
C0465913
D0373663

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03080
B03080
C03080
D03080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A152128905.850644%
B15213278218.286991%
C1521313779.051469%
D152134212.767370%

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 18277 15215 600 600 3.28% 3.94%
B 18278 15215 2033 2033 11.12% 13.36%
C 18278 15216 971 971 5.31% 6.38%
D 18278 15216 249 249 1.36% 1.64%

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 1046364 2594.99 1645 1602 402.6
A 12 80 884154 2192.09 1645 1602 402.6
A 12 250 657870 1630.04 1645 1602 402.6
B 10 44 6553494 19845.33 1558 1505 330.2
B 8 128 345999 1043.44 1558 1505 330.2
B 1 223 280022 843.6 1558 1505 330.2
C 12 254 1972061 4510.88 1589 1574 436.8
C 15 189 1683856 3851.12 1589 1574 436.8
C 0 192 768126 1754.81 1589 1574 436.8
D 6 42 477943 1055.76 1636 1577 451.2
D 8 176 405148 894.43 1636 1577 451.2
D 1 3 400341 883.78 1636 1577 451.2

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