ASTROSAT CZTI

Data Quality Report

Orbit 20171031_G08_028T01_9000001656_level2

Creation date: 2025-11-18T03:10:40.731927
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/AS1G08_028T01_9000001656cztM0_level2.fits modeM0/AS1G08_028T01_9000001656cztM0_level2_quad_clean.evt
Size (bytes)344,833,920281,073,600
Size328.9 MB 268.1 MB
Events in quadrant A1,949,0521,428,422
Events in quadrant B2,071,7301,622,409
Events in quadrant C2,084,3301,500,943
Events in quadrant D1,723,1341,350,220

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07700
B07700
C07700
D07700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01261850
B0960860
C0963940
D01220290

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A37985674917.767540%
B3798521685.707516%
C3798526256.910623%
D37985422511.122812%

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 43315 37536 0 0 0.00% 0.00%
B 43315 37984 0 0 0.00% 0.00%
C 43315 37985 0 0 0.00% 0.00%
D 43315 37660 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 1897 10.99 507 474 129.5
A 7 110 1621 8.86 507 474 129.5
A 9 19 1470 7.69 507 474 129.5
B 2 9 1861 12.08 547 520 111.0
B 5 225 1442 8.31 547 520 111.0
B 3 17 1396 7.89 547 520 111.0
C 12 241 1522 7.0 550 509 144.7
C 3 158 1375 5.99 550 509 144.7
C 2 191 1371 5.96 550 509 144.7
D 3 14 1366 6.89 491 446 133.5
D 6 231 1277 6.22 491 446 133.5
D 7 3 1234 5.9 491 446 133.5

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