ASTROSAT CZTI

Data Quality Report

Orbit 20171124_T01_207T01_9000001720_level2

Creation date: 2025-11-18T16:58:05.782686
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/AS1T01_207T01_9000001720cztM0_level2.fits modeM0/AS1T01_207T01_9000001720cztM0_level2_quad_clean.evt
Size (bytes)572,857,920545,693,760
Size546.3 MB 520.4 MB
Events in quadrant A3,325,8043,127,285
Events in quadrant B3,337,5003,208,229
Events in quadrant C3,527,8143,154,669
Events in quadrant D3,007,8002,889,509

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01874480
B01502760
C01243250
D01459320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0880
B0880
C0880
D0880

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012300
B012300
C012300
D012300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6044455919.249884%
B6044429954.955000%
C604446341.048905%
D6044417692.926676%

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 69330 60407 0 0 0.00% 0.00%
B 69330 60374 0 0 0.00% 0.00%
C 69330 60445 0 0 0.00% 0.00%
D 69330 60439 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 3157 11.03 867 815 212.3
A 7 110 2722 8.98 867 815 212.3
A 9 19 2549 8.17 867 815 212.3
B 2 9 2874 11.68 881 841 174.1
B 3 17 2249 8.09 881 841 174.1
B 5 128 2178 7.68 881 841 174.1
C 1 80 2613 7.17 931 866 243.7
C 1 81 2579 7.03 931 866 243.7
C 12 241 2444 6.47 931 866 243.7
D 7 3 2169 6.09 859 781 227.7
D 6 67 2118 5.87 859 781 227.7
D 6 231 2116 5.86 859 781 227.7

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