ASTROSAT CZTI

Data Quality Report

Orbit 50551

Creation date: 2025-02-01T07:37:38.171650
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/AS1T05_239T01_9000006444_50551cztM0_level2.fits modeM0/AS1T05_239T01_9000006444_50551cztM0_level2_quad_clean.evt
Size (bytes)1,179,164,160156,185,280
Size1.1 GB 148.9 MB
Events in quadrant A8,864,9831,070,475
Events in quadrant B7,830,6561,178,968
Events in quadrant C17,204,278687,047
Events in quadrant D8,848,704987,032

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0341363
B0314893
C0590903
D0344824

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0340
D0340

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02360
B02360
C02360
D02360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A116418367.181514%
B116417026.030410%
C11641488341.946568%
D116407416.365979%

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 14011 11643 632 632 4.51% 5.43%
B 14011 11642 373 373 2.66% 3.20%
C 14011 11643 3522 3522 25.14% 30.25%
D 14010 11642 600 600 4.28% 5.15%

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 12 250 1256178 4064.68 1244 1212 308.7
A 8 247 518684 1676.03 1244 1212 308.7
A 12 80 348493 1124.8 1244 1212 308.7
B 4 170 824710 3182.04 1241 1200 258.8
B 5 172 439914 1695.19 1241 1200 258.8
B 12 0 328026 1262.85 1241 1200 258.8
C 15 214 4395521 16687.42 944 935 263.3
C 15 178 2755933 10461.47 944 935 263.3
C 10 69 1415999 5373.38 944 935 263.3
D 6 42 917813 2739.26 1198 1153 334.6
D 8 48 723983 2160.04 1198 1153 334.6
D 2 165 409372 1219.88 1198 1153 334.6

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