ASTROSAT CZTI

Data Quality Report

Orbit 20181120_A05_225T02_9000002526_level2

Creation date: 2025-11-25T23:21:31.837559
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/AS1A05_225T02_9000002526cztM0_level2.fits modeM0/AS1A05_225T02_9000002526cztM0_level2_quad_clean.evt
Size (bytes)176,814,720190,080,000
Size168.6 MB 181.3 MB
Events in quadrant A1,106,9761,196,196
Events in quadrant B1,049,8821,197,992
Events in quadrant C1,062,2741,121,484
Events in quadrant D911,8481,016,231

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380
B0380
C0380
D0380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03600
B03600
C03600
D03600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0368130
B0388540
C0414480
D0472920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A177621170.658710%
B177622281.283639%
C177622401.351199%
D177617544.245256%

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 21507 17761 0 0 0.00% 0.00%
B 21507 17761 0 0 0.00% 0.00%
C 21507 17762 0 0 0.00% 0.00%
D 21507 17754 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 1090 11.3 288 274 72.2
A 7 110 928 9.06 288 274 72.2
A 9 19 838 7.81 288 274 72.2
B 2 9 860 10.65 278 268 55.6
B 2 8 711 7.97 278 268 55.6
B 5 128 691 7.61 278 268 55.6
C 12 241 761 6.69 281 265 74.2
C 2 191 727 6.23 281 265 74.2
C 3 126 708 5.97 281 265 74.2
D 10 189 668 6.0 261 239 71.5
D 3 14 650 5.75 261 239 71.5
D 6 231 648 5.72 261 239 71.5

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